./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label48.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label48.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8 --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 7a889f150dc2c455e03355eaf9dfccf3bdcd55e31f50409b2096126a8e217346 --- 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-e04fb08 [2022-11-16 11:55:37,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:55:37,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:55:37,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:55:37,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:55:37,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:55:37,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:55:37,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:55:37,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:55:37,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:55:37,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:55:37,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:55:37,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:55:37,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:55:37,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:55:37,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:55:37,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:55:37,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:55:37,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:55:37,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:55:37,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:55:37,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:55:37,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:55:37,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:55:37,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:55:37,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:55:37,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:55:37,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:55:37,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:55:37,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:55:37,889 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:55:37,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:55:37,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:55:37,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:55:37,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:55:37,896 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:55:37,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:55:37,897 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:55:37,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:55:37,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:55:37,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:55:37,900 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:55:37,941 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:55:37,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:55:37,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:55:37,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:55:37,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:55:37,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:55:37,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:55:37,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:55:37,944 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:55:37,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:55:37,946 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:55:37,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:55:37,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:55:37,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:55:37,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:55:37,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:55:37,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:55:37,947 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:55:37,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:55:37,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:55:37,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:55:37,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:55:37,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:55:37,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:55:37,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:55:37,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:55:37,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:55:37,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:55:37,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:55:37,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:55:37,952 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:55:37,952 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:55:37,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:55:37,952 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_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a889f150dc2c455e03355eaf9dfccf3bdcd55e31f50409b2096126a8e217346 [2022-11-16 11:55:38,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:55:38,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:55:38,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:55:38,295 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:55:38,295 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:55:38,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/eca-rers2012/Problem11_label48.c [2022-11-16 11:55:38,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/data/0771fa20c/76595ddf5d2f4811abd1f3d586af814b/FLAG2df73f984 [2022-11-16 11:55:38,970 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:55:38,970 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/sv-benchmarks/c/eca-rers2012/Problem11_label48.c [2022-11-16 11:55:38,984 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/data/0771fa20c/76595ddf5d2f4811abd1f3d586af814b/FLAG2df73f984 [2022-11-16 11:55:39,206 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/data/0771fa20c/76595ddf5d2f4811abd1f3d586af814b [2022-11-16 11:55:39,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:55:39,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:55:39,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:55:39,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:55:39,219 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:55:39,220 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:55:39" (1/1) ... [2022-11-16 11:55:39,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3af41e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:39, skipping insertion in model container [2022-11-16 11:55:39,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:55:39" (1/1) ... [2022-11-16 11:55:39,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:55:39,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:55:39,634 WARN L229 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_c520b273-03a4-4d3e-ab37-4c398c8f1135/sv-benchmarks/c/eca-rers2012/Problem11_label48.c[7294,7307] [2022-11-16 11:55:39,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:55:39,897 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:55:39,937 WARN L229 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_c520b273-03a4-4d3e-ab37-4c398c8f1135/sv-benchmarks/c/eca-rers2012/Problem11_label48.c[7294,7307] [2022-11-16 11:55:40,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:55:40,123 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:55:40,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40 WrapperNode [2022-11-16 11:55:40,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:55:40,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:55:40,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:55:40,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:55:40,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,293 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2022-11-16 11:55:40,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:55:40,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:55:40,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:55:40,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:55:40,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,422 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:55:40,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:55:40,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:55:40,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:55:40,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (1/1) ... [2022-11-16 11:55:40,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:55:40,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:40,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:55:40,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:55:40,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:55:40,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:55:40,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:55:40,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:55:40,657 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:55:40,660 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:55:42,463 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:55:42,481 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:55:42,481 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:55:42,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:55:42 BoogieIcfgContainer [2022-11-16 11:55:42,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:55:42,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:55:42,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:55:42,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:55:42,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:55:39" (1/3) ... [2022-11-16 11:55:42,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3aebd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:55:42, skipping insertion in model container [2022-11-16 11:55:42,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:40" (2/3) ... [2022-11-16 11:55:42,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3aebd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:55:42, skipping insertion in model container [2022-11-16 11:55:42,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:55:42" (3/3) ... [2022-11-16 11:55:42,501 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label48.c [2022-11-16 11:55:42,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:55:42,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:55:42,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:55:42,587 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;@792ec4f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:55:42,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:55:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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) [2022-11-16 11:55:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 11:55:42,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:42,602 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] [2022-11-16 11:55:42,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:42,608 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2022-11-16 11:55:42,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:42,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93317140] [2022-11-16 11:55:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:42,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:43,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:43,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93317140] [2022-11-16 11:55:43,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93317140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:43,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:43,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:55:43,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391003854] [2022-11-16 11:55:43,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:43,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:43,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:43,141 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2022-11-16 11:55:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:44,485 INFO L93 Difference]: Finished difference Result 769 states and 1360 transitions. [2022-11-16 11:55:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:44,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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 50 [2022-11-16 11:55:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:44,501 INFO L225 Difference]: With dead ends: 769 [2022-11-16 11:55:44,501 INFO L226 Difference]: Without dead ends: 422 [2022-11-16 11:55:44,505 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 [2022-11-16 11:55:44,509 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 190 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:44,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 163 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:55:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-16 11:55:44,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2022-11-16 11:55:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5231143552311435) internal successors, (626), 411 states have internal predecessors, (626), 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) [2022-11-16 11:55:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 626 transitions. [2022-11-16 11:55:44,570 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 626 transitions. Word has length 50 [2022-11-16 11:55:44,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:44,571 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 626 transitions. [2022-11-16 11:55:44,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 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) [2022-11-16 11:55:44,571 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 626 transitions. [2022-11-16 11:55:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 11:55:44,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:44,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:44,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:55:44,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:44,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1807266807, now seen corresponding path program 1 times [2022-11-16 11:55:44,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:44,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556665095] [2022-11-16 11:55:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:44,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:44,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:44,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556665095] [2022-11-16 11:55:44,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556665095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:44,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:44,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:55:44,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034787149] [2022-11-16 11:55:44,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:44,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:44,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:44,746 INFO L87 Difference]: Start difference. First operand 412 states and 626 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2022-11-16 11:55:45,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:45,741 INFO L93 Difference]: Finished difference Result 1194 states and 1821 transitions. [2022-11-16 11:55:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:45,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 116 [2022-11-16 11:55:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:45,752 INFO L225 Difference]: With dead ends: 1194 [2022-11-16 11:55:45,752 INFO L226 Difference]: Without dead ends: 784 [2022-11-16 11:55:45,754 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 [2022-11-16 11:55:45,755 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:45,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 154 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:55:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-11-16 11:55:45,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2022-11-16 11:55:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.3742017879948913) internal successors, (1076), 783 states have internal predecessors, (1076), 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) [2022-11-16 11:55:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1076 transitions. [2022-11-16 11:55:45,819 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1076 transitions. Word has length 116 [2022-11-16 11:55:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:45,819 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 1076 transitions. [2022-11-16 11:55:45,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2022-11-16 11:55:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1076 transitions. [2022-11-16 11:55:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-16 11:55:45,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:45,831 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:45,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:55:45,832 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:45,833 INFO L85 PathProgramCache]: Analyzing trace with hash -66853459, now seen corresponding path program 1 times [2022-11-16 11:55:45,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:45,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665872708] [2022-11-16 11:55:45,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:45,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:45,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:46,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665872708] [2022-11-16 11:55:46,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665872708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:46,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:46,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:55:46,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051428141] [2022-11-16 11:55:46,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:46,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:46,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:46,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:46,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:46,223 INFO L87 Difference]: Start difference. First operand 784 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2022-11-16 11:55:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:47,225 INFO L93 Difference]: Finished difference Result 1936 states and 2599 transitions. [2022-11-16 11:55:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:47,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 120 [2022-11-16 11:55:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:47,230 INFO L225 Difference]: With dead ends: 1936 [2022-11-16 11:55:47,230 INFO L226 Difference]: Without dead ends: 1154 [2022-11-16 11:55:47,232 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 [2022-11-16 11:55:47,233 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:47,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 190 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:55:47,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-11-16 11:55:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1153. [2022-11-16 11:55:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.2699652777777777) internal successors, (1463), 1152 states have internal predecessors, (1463), 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) [2022-11-16 11:55:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1463 transitions. [2022-11-16 11:55:47,262 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1463 transitions. Word has length 120 [2022-11-16 11:55:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:47,263 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 1463 transitions. [2022-11-16 11:55:47,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2022-11-16 11:55:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1463 transitions. [2022-11-16 11:55:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-16 11:55:47,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:47,268 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:47,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:55:47,269 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:47,270 INFO L85 PathProgramCache]: Analyzing trace with hash -2125699946, now seen corresponding path program 1 times [2022-11-16 11:55:47,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:47,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703626547] [2022-11-16 11:55:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:47,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:47,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:47,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703626547] [2022-11-16 11:55:47,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703626547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:47,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:47,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:55:47,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118054750] [2022-11-16 11:55:47,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:47,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:47,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:47,571 INFO L87 Difference]: Start difference. First operand 1153 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2022-11-16 11:55:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:48,556 INFO L93 Difference]: Finished difference Result 2679 states and 3481 transitions. [2022-11-16 11:55:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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 162 [2022-11-16 11:55:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:48,564 INFO L225 Difference]: With dead ends: 2679 [2022-11-16 11:55:48,564 INFO L226 Difference]: Without dead ends: 1712 [2022-11-16 11:55:48,565 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 [2022-11-16 11:55:48,567 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 156 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:48,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 332 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:55:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-11-16 11:55:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1521. [2022-11-16 11:55:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 1.255921052631579) internal successors, (1909), 1520 states have internal predecessors, (1909), 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) [2022-11-16 11:55:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1909 transitions. [2022-11-16 11:55:48,603 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1909 transitions. Word has length 162 [2022-11-16 11:55:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:48,604 INFO L495 AbstractCegarLoop]: Abstraction has 1521 states and 1909 transitions. [2022-11-16 11:55:48,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2022-11-16 11:55:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1909 transitions. [2022-11-16 11:55:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-16 11:55:48,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:48,609 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:48,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:55:48,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:48,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1101521033, now seen corresponding path program 1 times [2022-11-16 11:55:48,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:48,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125401428] [2022-11-16 11:55:48,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:48,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-16 11:55:48,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:48,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125401428] [2022-11-16 11:55:48,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125401428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:48,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:48,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:55:48,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064028478] [2022-11-16 11:55:48,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:48,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:48,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:48,913 INFO L87 Difference]: Start difference. First operand 1521 states and 1909 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2022-11-16 11:55:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:49,935 INFO L93 Difference]: Finished difference Result 3597 states and 4559 transitions. [2022-11-16 11:55:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:49,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 232 [2022-11-16 11:55:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:49,943 INFO L225 Difference]: With dead ends: 3597 [2022-11-16 11:55:49,943 INFO L226 Difference]: Without dead ends: 2078 [2022-11-16 11:55:49,945 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 [2022-11-16 11:55:49,947 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 147 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:49,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 391 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:55:49,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2022-11-16 11:55:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1889. [2022-11-16 11:55:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 1.2473516949152543) internal successors, (2355), 1888 states have internal predecessors, (2355), 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) [2022-11-16 11:55:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2355 transitions. [2022-11-16 11:55:50,014 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2355 transitions. Word has length 232 [2022-11-16 11:55:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:50,017 INFO L495 AbstractCegarLoop]: Abstraction has 1889 states and 2355 transitions. [2022-11-16 11:55:50,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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) [2022-11-16 11:55:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2355 transitions. [2022-11-16 11:55:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-16 11:55:50,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:50,027 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:50,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:55:50,028 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash 697992722, now seen corresponding path program 1 times [2022-11-16 11:55:50,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:50,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162182728] [2022-11-16 11:55:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:50,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:50,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:50,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162182728] [2022-11-16 11:55:50,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162182728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:50,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:50,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:55:50,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630527637] [2022-11-16 11:55:50,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:50,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:50,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:50,506 INFO L87 Difference]: Start difference. First operand 1889 states and 2355 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2022-11-16 11:55:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:51,567 INFO L93 Difference]: Finished difference Result 5077 states and 6327 transitions. [2022-11-16 11:55:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 259 [2022-11-16 11:55:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:51,578 INFO L225 Difference]: With dead ends: 5077 [2022-11-16 11:55:51,578 INFO L226 Difference]: Without dead ends: 3190 [2022-11-16 11:55:51,581 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 [2022-11-16 11:55:51,581 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 123 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:51,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 141 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:55:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2022-11-16 11:55:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 3186. [2022-11-16 11:55:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 1.2160125588697017) internal successors, (3873), 3185 states have internal predecessors, (3873), 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) [2022-11-16 11:55:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 3873 transitions. [2022-11-16 11:55:51,651 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 3873 transitions. Word has length 259 [2022-11-16 11:55:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:51,652 INFO L495 AbstractCegarLoop]: Abstraction has 3186 states and 3873 transitions. [2022-11-16 11:55:51,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2022-11-16 11:55:51,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 3873 transitions. [2022-11-16 11:55:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-11-16 11:55:51,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:51,658 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:51,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:55:51,659 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash 387212821, now seen corresponding path program 1 times [2022-11-16 11:55:51,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:51,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937265310] [2022-11-16 11:55:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:51,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:52,194 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-16 11:55:52,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937265310] [2022-11-16 11:55:52,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937265310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:52,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:52,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:55:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522371283] [2022-11-16 11:55:52,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:52,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:52,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:52,198 INFO L87 Difference]: Start difference. First operand 3186 states and 3873 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-16 11:55:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:53,150 INFO L93 Difference]: Finished difference Result 8220 states and 9834 transitions. [2022-11-16 11:55:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:53,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 265 [2022-11-16 11:55:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:53,166 INFO L225 Difference]: With dead ends: 8220 [2022-11-16 11:55:53,166 INFO L226 Difference]: Without dead ends: 5036 [2022-11-16 11:55:53,170 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 [2022-11-16 11:55:53,174 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 171 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:53,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 392 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:55:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2022-11-16 11:55:53,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 5035. [2022-11-16 11:55:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 5034 states have (on average 1.1835518474374256) internal successors, (5958), 5034 states have internal predecessors, (5958), 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) [2022-11-16 11:55:53,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 5958 transitions. [2022-11-16 11:55:53,282 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 5958 transitions. Word has length 265 [2022-11-16 11:55:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:53,283 INFO L495 AbstractCegarLoop]: Abstraction has 5035 states and 5958 transitions. [2022-11-16 11:55:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-16 11:55:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 5958 transitions. [2022-11-16 11:55:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-16 11:55:53,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:53,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:53,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:55:53,290 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:53,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -914056920, now seen corresponding path program 1 times [2022-11-16 11:55:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:53,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992821192] [2022-11-16 11:55:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:53,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 137 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:54,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992821192] [2022-11-16 11:55:54,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992821192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:55:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331583695] [2022-11-16 11:55:54,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:54,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:55:54,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:54,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:55:54,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:55:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:55:54,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:55:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-16 11:55:55,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:55:55,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331583695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:55,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:55:55,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-16 11:55:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706386491] [2022-11-16 11:55:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:55,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:55:55,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:55:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:55:55,465 INFO L87 Difference]: Start difference. First operand 5035 states and 5958 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2022-11-16 11:55:56,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:56,918 INFO L93 Difference]: Finished difference Result 13958 states and 16430 transitions. [2022-11-16 11:55:56,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:55:56,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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 268 [2022-11-16 11:55:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:56,949 INFO L225 Difference]: With dead ends: 13958 [2022-11-16 11:55:56,949 INFO L226 Difference]: Without dead ends: 9293 [2022-11-16 11:55:56,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:55:56,955 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 274 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:56,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 192 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:55:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2022-11-16 11:55:57,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 4667. [2022-11-16 11:55:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 1.1941705957994) internal successors, (5572), 4666 states have internal predecessors, (5572), 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) [2022-11-16 11:55:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 5572 transitions. [2022-11-16 11:55:57,118 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 5572 transitions. Word has length 268 [2022-11-16 11:55:57,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:57,118 INFO L495 AbstractCegarLoop]: Abstraction has 4667 states and 5572 transitions. [2022-11-16 11:55:57,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 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) [2022-11-16 11:55:57,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 5572 transitions. [2022-11-16 11:55:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-11-16 11:55:57,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:57,125 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-16 11:55:57,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:55:57,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:55:57,331 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:57,331 INFO L85 PathProgramCache]: Analyzing trace with hash 448170155, now seen corresponding path program 1 times [2022-11-16 11:55:57,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:57,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632432798] [2022-11-16 11:55:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:57,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:58,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:58,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632432798] [2022-11-16 11:55:58,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632432798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:58,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:58,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:55:58,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689633818] [2022-11-16 11:55:58,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:58,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:55:58,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:58,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:55:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:55:58,095 INFO L87 Difference]: Start difference. First operand 4667 states and 5572 transitions. Second operand has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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) [2022-11-16 11:56:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:00,786 INFO L93 Difference]: Finished difference Result 15972 states and 19215 transitions. [2022-11-16 11:56:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:56:00,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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 269 [2022-11-16 11:56:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:00,831 INFO L225 Difference]: With dead ends: 15972 [2022-11-16 11:56:00,831 INFO L226 Difference]: Without dead ends: 11307 [2022-11-16 11:56:00,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:56:00,841 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 376 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:00,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 152 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 11:56:00,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11307 states. [2022-11-16 11:56:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11307 to 10930. [2022-11-16 11:56:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10930 states, 10929 states have (on average 1.1707384024155916) internal successors, (12795), 10929 states have internal predecessors, (12795), 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) [2022-11-16 11:56:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10930 states to 10930 states and 12795 transitions. [2022-11-16 11:56:01,081 INFO L78 Accepts]: Start accepts. Automaton has 10930 states and 12795 transitions. Word has length 269 [2022-11-16 11:56:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:01,082 INFO L495 AbstractCegarLoop]: Abstraction has 10930 states and 12795 transitions. [2022-11-16 11:56:01,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.8) internal successors, (269), 4 states have internal predecessors, (269), 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) [2022-11-16 11:56:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10930 states and 12795 transitions. [2022-11-16 11:56:01,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-11-16 11:56:01,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:01,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-16 11:56:01,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:56:01,095 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash 510762410, now seen corresponding path program 1 times [2022-11-16 11:56:01,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946598853] [2022-11-16 11:56:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:01,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-16 11:56:01,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:01,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946598853] [2022-11-16 11:56:01,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946598853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:01,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:01,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:01,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056046836] [2022-11-16 11:56:01,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:01,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:01,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:01,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:01,353 INFO L87 Difference]: Start difference. First operand 10930 states and 12795 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-16 11:56:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:02,293 INFO L93 Difference]: Finished difference Result 21488 states and 25200 transitions. [2022-11-16 11:56:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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 280 [2022-11-16 11:56:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:02,314 INFO L225 Difference]: With dead ends: 21488 [2022-11-16 11:56:02,314 INFO L226 Difference]: Without dead ends: 10928 [2022-11-16 11:56:02,325 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 [2022-11-16 11:56:02,326 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 185 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:02,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 304 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:56:02,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10928 states. [2022-11-16 11:56:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 10744. [2022-11-16 11:56:02,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10744 states, 10743 states have (on average 1.141952899562506) internal successors, (12268), 10743 states have internal predecessors, (12268), 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) [2022-11-16 11:56:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10744 states to 10744 states and 12268 transitions. [2022-11-16 11:56:02,514 INFO L78 Accepts]: Start accepts. Automaton has 10744 states and 12268 transitions. Word has length 280 [2022-11-16 11:56:02,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:02,515 INFO L495 AbstractCegarLoop]: Abstraction has 10744 states and 12268 transitions. [2022-11-16 11:56:02,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 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) [2022-11-16 11:56:02,515 INFO L276 IsEmpty]: Start isEmpty. Operand 10744 states and 12268 transitions. [2022-11-16 11:56:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-11-16 11:56:02,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:02,523 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-16 11:56:02,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:56:02,523 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:02,524 INFO L85 PathProgramCache]: Analyzing trace with hash 577294273, now seen corresponding path program 1 times [2022-11-16 11:56:02,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:02,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718371037] [2022-11-16 11:56:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:02,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 95 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:02,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:02,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718371037] [2022-11-16 11:56:02,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718371037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:02,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599376236] [2022-11-16 11:56:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:02,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:02,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:02,984 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:03,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:56:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:03,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:56:03,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:03,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:56:03,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599376236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:03,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:56:03,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 11:56:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222166632] [2022-11-16 11:56:03,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:03,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:03,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:03,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:03,605 INFO L87 Difference]: Start difference. First operand 10744 states and 12268 transitions. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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) [2022-11-16 11:56:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:04,636 INFO L93 Difference]: Finished difference Result 22426 states and 25761 transitions. [2022-11-16 11:56:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:04,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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 283 [2022-11-16 11:56:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:04,658 INFO L225 Difference]: With dead ends: 22426 [2022-11-16 11:56:04,659 INFO L226 Difference]: Without dead ends: 12052 [2022-11-16 11:56:04,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:04,669 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 99 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:04,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 342 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:56:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12052 states. [2022-11-16 11:56:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12052 to 12043. [2022-11-16 11:56:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12043 states, 12042 states have (on average 1.143996013951171) internal successors, (13776), 12042 states have internal predecessors, (13776), 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) [2022-11-16 11:56:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12043 states to 12043 states and 13776 transitions. [2022-11-16 11:56:04,870 INFO L78 Accepts]: Start accepts. Automaton has 12043 states and 13776 transitions. Word has length 283 [2022-11-16 11:56:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:04,870 INFO L495 AbstractCegarLoop]: Abstraction has 12043 states and 13776 transitions. [2022-11-16 11:56:04,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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) [2022-11-16 11:56:04,871 INFO L276 IsEmpty]: Start isEmpty. Operand 12043 states and 13776 transitions. [2022-11-16 11:56:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-11-16 11:56:04,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:04,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-16 11:56:04,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:56:05,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:05,084 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:05,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1277495970, now seen corresponding path program 1 times [2022-11-16 11:56:05,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:05,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327640993] [2022-11-16 11:56:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:05,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:05,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:05,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327640993] [2022-11-16 11:56:05,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327640993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:05,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:05,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:56:05,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110727398] [2022-11-16 11:56:05,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:05,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:05,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:05,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:05,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:56:05,715 INFO L87 Difference]: Start difference. First operand 12043 states and 13776 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 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) [2022-11-16 11:56:07,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:07,355 INFO L93 Difference]: Finished difference Result 26298 states and 30094 transitions. [2022-11-16 11:56:07,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:07,356 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 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 286 [2022-11-16 11:56:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:07,381 INFO L225 Difference]: With dead ends: 26298 [2022-11-16 11:56:07,381 INFO L226 Difference]: Without dead ends: 14625 [2022-11-16 11:56:07,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:56:07,391 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 267 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:07,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 97 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 11:56:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14625 states. [2022-11-16 11:56:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14625 to 14619. [2022-11-16 11:56:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14619 states, 14618 states have (on average 1.1313449172253387) internal successors, (16538), 14618 states have internal predecessors, (16538), 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) [2022-11-16 11:56:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14619 states to 14619 states and 16538 transitions. [2022-11-16 11:56:07,595 INFO L78 Accepts]: Start accepts. Automaton has 14619 states and 16538 transitions. Word has length 286 [2022-11-16 11:56:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:07,596 INFO L495 AbstractCegarLoop]: Abstraction has 14619 states and 16538 transitions. [2022-11-16 11:56:07,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 4 states have internal predecessors, (286), 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) [2022-11-16 11:56:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 14619 states and 16538 transitions. [2022-11-16 11:56:07,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-16 11:56:07,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:07,607 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-11-16 11:56:07,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:56:07,607 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1227652913, now seen corresponding path program 1 times [2022-11-16 11:56:07,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:07,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232460182] [2022-11-16 11:56:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:08,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:08,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232460182] [2022-11-16 11:56:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232460182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:08,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:08,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:56:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602329670] [2022-11-16 11:56:08,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:08,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:08,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:08,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:56:08,352 INFO L87 Difference]: Start difference. First operand 14619 states and 16538 transitions. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2022-11-16 11:56:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:09,993 INFO L93 Difference]: Finished difference Result 30912 states and 35030 transitions. [2022-11-16 11:56:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:09,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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 288 [2022-11-16 11:56:09,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:10,021 INFO L225 Difference]: With dead ends: 30912 [2022-11-16 11:56:10,021 INFO L226 Difference]: Without dead ends: 16663 [2022-11-16 11:56:10,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:56:10,032 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 252 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:10,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 178 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:56:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16663 states. [2022-11-16 11:56:10,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16663 to 15550. [2022-11-16 11:56:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15550 states, 15549 states have (on average 1.1291401376294294) internal successors, (17557), 15549 states have internal predecessors, (17557), 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) [2022-11-16 11:56:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15550 states to 15550 states and 17557 transitions. [2022-11-16 11:56:10,237 INFO L78 Accepts]: Start accepts. Automaton has 15550 states and 17557 transitions. Word has length 288 [2022-11-16 11:56:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:10,237 INFO L495 AbstractCegarLoop]: Abstraction has 15550 states and 17557 transitions. [2022-11-16 11:56:10,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 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) [2022-11-16 11:56:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 15550 states and 17557 transitions. [2022-11-16 11:56:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-11-16 11:56:10,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:10,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 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] [2022-11-16 11:56:10,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:56:10,249 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:10,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 100748151, now seen corresponding path program 1 times [2022-11-16 11:56:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:10,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159161321] [2022-11-16 11:56:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:10,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-16 11:56:10,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:10,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159161321] [2022-11-16 11:56:10,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159161321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:10,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:10,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:10,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216327251] [2022-11-16 11:56:10,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:10,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:10,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:10,519 INFO L87 Difference]: Start difference. First operand 15550 states and 17557 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2022-11-16 11:56:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:11,668 INFO L93 Difference]: Finished difference Result 33857 states and 38353 transitions. [2022-11-16 11:56:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:11,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 312 [2022-11-16 11:56:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:11,706 INFO L225 Difference]: With dead ends: 33857 [2022-11-16 11:56:11,706 INFO L226 Difference]: Without dead ends: 18677 [2022-11-16 11:56:11,717 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 [2022-11-16 11:56:11,718 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 152 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:11,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 357 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:56:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18677 states. [2022-11-16 11:56:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18677 to 17573. [2022-11-16 11:56:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17573 states, 17572 states have (on average 1.1226951969041656) internal successors, (19728), 17572 states have internal predecessors, (19728), 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) [2022-11-16 11:56:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17573 states to 17573 states and 19728 transitions. [2022-11-16 11:56:11,996 INFO L78 Accepts]: Start accepts. Automaton has 17573 states and 19728 transitions. Word has length 312 [2022-11-16 11:56:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:11,996 INFO L495 AbstractCegarLoop]: Abstraction has 17573 states and 19728 transitions. [2022-11-16 11:56:11,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2022-11-16 11:56:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 17573 states and 19728 transitions. [2022-11-16 11:56:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-11-16 11:56:12,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:12,005 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:12,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:56:12,006 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1462001354, now seen corresponding path program 1 times [2022-11-16 11:56:12,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:12,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914183933] [2022-11-16 11:56:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:12,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 221 proven. 72 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 11:56:13,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:13,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914183933] [2022-11-16 11:56:13,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914183933] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:13,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102337089] [2022-11-16 11:56:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:13,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:13,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:13,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:13,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:56:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:13,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:56:13,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 11:56:13,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:56:13,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102337089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:13,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:56:13,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 11:56:13,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337187314] [2022-11-16 11:56:13,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:13,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:13,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:13,721 INFO L87 Difference]: Start difference. First operand 17573 states and 19728 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-11-16 11:56:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:14,604 INFO L93 Difference]: Finished difference Result 37361 states and 41940 transitions. [2022-11-16 11:56:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:14,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 [2022-11-16 11:56:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:14,641 INFO L225 Difference]: With dead ends: 37361 [2022-11-16 11:56:14,642 INFO L226 Difference]: Without dead ends: 19974 [2022-11-16 11:56:14,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:14,655 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 84 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:14,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 365 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:56:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19974 states. [2022-11-16 11:56:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19974 to 19235. [2022-11-16 11:56:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19235 states, 19234 states have (on average 1.116928356036186) internal successors, (21483), 19234 states have internal predecessors, (21483), 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) [2022-11-16 11:56:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19235 states to 19235 states and 21483 transitions. [2022-11-16 11:56:14,916 INFO L78 Accepts]: Start accepts. Automaton has 19235 states and 21483 transitions. Word has length 337 [2022-11-16 11:56:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:14,917 INFO L495 AbstractCegarLoop]: Abstraction has 19235 states and 21483 transitions. [2022-11-16 11:56:14,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-11-16 11:56:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 19235 states and 21483 transitions. [2022-11-16 11:56:14,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-11-16 11:56:14,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:14,929 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 11:56:14,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:15,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:15,135 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1351852439, now seen corresponding path program 1 times [2022-11-16 11:56:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:15,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455966535] [2022-11-16 11:56:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:15,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 254 proven. 54 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-16 11:56:16,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455966535] [2022-11-16 11:56:16,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455966535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139254642] [2022-11-16 11:56:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:16,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:16,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:16,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:56:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:56:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-11-16 11:56:16,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:56:16,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139254642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:16,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:56:16,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 11:56:16,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546127698] [2022-11-16 11:56:16,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:16,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:16,871 INFO L87 Difference]: Start difference. First operand 19235 states and 21483 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-11-16 11:56:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:17,771 INFO L93 Difference]: Finished difference Result 39389 states and 43927 transitions. [2022-11-16 11:56:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:17,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 358 [2022-11-16 11:56:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:17,795 INFO L225 Difference]: With dead ends: 39389 [2022-11-16 11:56:17,795 INFO L226 Difference]: Without dead ends: 20156 [2022-11-16 11:56:17,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:17,807 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 91 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:17,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 170 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:56:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2022-11-16 11:56:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 17753. [2022-11-16 11:56:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17753 states, 17752 states have (on average 1.1128323569175305) internal successors, (19755), 17752 states have internal predecessors, (19755), 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) [2022-11-16 11:56:18,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17753 states to 17753 states and 19755 transitions. [2022-11-16 11:56:18,052 INFO L78 Accepts]: Start accepts. Automaton has 17753 states and 19755 transitions. Word has length 358 [2022-11-16 11:56:18,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:18,053 INFO L495 AbstractCegarLoop]: Abstraction has 17753 states and 19755 transitions. [2022-11-16 11:56:18,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2022-11-16 11:56:18,053 INFO L276 IsEmpty]: Start isEmpty. Operand 17753 states and 19755 transitions. [2022-11-16 11:56:18,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-11-16 11:56:18,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:18,066 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:18,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:18,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:18,272 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:18,272 INFO L85 PathProgramCache]: Analyzing trace with hash -93934851, now seen corresponding path program 1 times [2022-11-16 11:56:18,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:18,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742540847] [2022-11-16 11:56:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:18,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 267 proven. 78 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-16 11:56:19,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:19,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742540847] [2022-11-16 11:56:19,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742540847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720957308] [2022-11-16 11:56:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:19,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:19,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:19,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:19,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:56:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:19,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:56:19,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-11-16 11:56:20,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-11-16 11:56:20,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720957308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:20,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:20,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2022-11-16 11:56:20,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787487811] [2022-11-16 11:56:20,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:20,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:56:20,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:56:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:56:20,787 INFO L87 Difference]: Start difference. First operand 17753 states and 19755 transitions. Second operand has 9 states, 9 states have (on average 55.888888888888886) internal successors, (503), 8 states have internal predecessors, (503), 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) [2022-11-16 11:56:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:25,860 INFO L93 Difference]: Finished difference Result 46952 states and 52194 transitions. [2022-11-16 11:56:25,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:56:25,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 55.888888888888886) internal successors, (503), 8 states have internal predecessors, (503), 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 375 [2022-11-16 11:56:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:25,894 INFO L225 Difference]: With dead ends: 46952 [2022-11-16 11:56:25,894 INFO L226 Difference]: Without dead ends: 28833 [2022-11-16 11:56:25,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 746 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:56:25,905 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1516 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5249 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 5747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 5249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:25,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 218 Invalid, 5747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 5249 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-16 11:56:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28833 states. [2022-11-16 11:56:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28833 to 13879. [2022-11-16 11:56:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13879 states, 13878 states have (on average 1.1119757890185906) internal successors, (15432), 13878 states have internal predecessors, (15432), 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) [2022-11-16 11:56:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13879 states to 13879 states and 15432 transitions. [2022-11-16 11:56:26,181 INFO L78 Accepts]: Start accepts. Automaton has 13879 states and 15432 transitions. Word has length 375 [2022-11-16 11:56:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:26,182 INFO L495 AbstractCegarLoop]: Abstraction has 13879 states and 15432 transitions. [2022-11-16 11:56:26,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.888888888888886) internal successors, (503), 8 states have internal predecessors, (503), 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) [2022-11-16 11:56:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13879 states and 15432 transitions. [2022-11-16 11:56:26,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-11-16 11:56:26,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:26,192 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:26,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:26,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:56:26,399 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:26,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1257108569, now seen corresponding path program 1 times [2022-11-16 11:56:26,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:26,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011565651] [2022-11-16 11:56:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:26,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 143 proven. 202 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-16 11:56:26,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:26,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011565651] [2022-11-16 11:56:26,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011565651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:26,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891014735] [2022-11-16 11:56:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:26,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:26,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:26,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:26,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:56:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:27,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:56:27,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 11:56:27,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:56:27,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891014735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:27,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:56:27,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 11:56:27,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848511118] [2022-11-16 11:56:27,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:27,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:27,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:27,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:56:27,558 INFO L87 Difference]: Start difference. First operand 13879 states and 15432 transitions. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 3 states have internal predecessors, (334), 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) [2022-11-16 11:56:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:29,002 INFO L93 Difference]: Finished difference Result 28868 states and 32094 transitions. [2022-11-16 11:56:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 3 states have internal predecessors, (334), 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 381 [2022-11-16 11:56:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:29,015 INFO L225 Difference]: With dead ends: 28868 [2022-11-16 11:56:29,015 INFO L226 Difference]: Without dead ends: 15359 [2022-11-16 11:56:29,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:56:29,023 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 222 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:29,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 112 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:56:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15359 states. [2022-11-16 11:56:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15359 to 14249. [2022-11-16 11:56:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14249 states, 14248 states have (on average 1.1099803481190342) internal successors, (15815), 14248 states have internal predecessors, (15815), 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) [2022-11-16 11:56:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14249 states to 14249 states and 15815 transitions. [2022-11-16 11:56:29,206 INFO L78 Accepts]: Start accepts. Automaton has 14249 states and 15815 transitions. Word has length 381 [2022-11-16 11:56:29,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:29,207 INFO L495 AbstractCegarLoop]: Abstraction has 14249 states and 15815 transitions. [2022-11-16 11:56:29,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 3 states have internal predecessors, (334), 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) [2022-11-16 11:56:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 14249 states and 15815 transitions. [2022-11-16 11:56:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-11-16 11:56:29,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:29,216 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:29,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:29,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:56:29,422 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:29,422 INFO L85 PathProgramCache]: Analyzing trace with hash 431909693, now seen corresponding path program 1 times [2022-11-16 11:56:29,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:29,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901984192] [2022-11-16 11:56:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:29,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 143 proven. 211 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-16 11:56:29,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:29,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901984192] [2022-11-16 11:56:29,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901984192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:29,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940065411] [2022-11-16 11:56:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:29,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:29,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:29,888 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:29,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:56:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:30,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:56:30,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 354 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-16 11:56:30,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:56:30,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940065411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:30,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:56:30,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-16 11:56:30,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692127351] [2022-11-16 11:56:30,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:30,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:30,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:30,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:30,449 INFO L87 Difference]: Start difference. First operand 14249 states and 15815 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-11-16 11:56:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:31,328 INFO L93 Difference]: Finished difference Result 32211 states and 35917 transitions. [2022-11-16 11:56:31,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:31,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 395 [2022-11-16 11:56:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:31,344 INFO L225 Difference]: With dead ends: 32211 [2022-11-16 11:56:31,344 INFO L226 Difference]: Without dead ends: 18332 [2022-11-16 11:56:31,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:31,352 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 104 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:31,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 321 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:56:31,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18332 states. [2022-11-16 11:56:31,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18332 to 17586. [2022-11-16 11:56:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17586 states, 17585 states have (on average 1.1144725618424793) internal successors, (19598), 17585 states have internal predecessors, (19598), 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) [2022-11-16 11:56:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17586 states to 17586 states and 19598 transitions. [2022-11-16 11:56:31,562 INFO L78 Accepts]: Start accepts. Automaton has 17586 states and 19598 transitions. Word has length 395 [2022-11-16 11:56:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:31,562 INFO L495 AbstractCegarLoop]: Abstraction has 17586 states and 19598 transitions. [2022-11-16 11:56:31,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2022-11-16 11:56:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 17586 states and 19598 transitions. [2022-11-16 11:56:31,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-11-16 11:56:31,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:31,571 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:31,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:31,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:31,777 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1465243018, now seen corresponding path program 1 times [2022-11-16 11:56:31,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:31,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263252265] [2022-11-16 11:56:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-16 11:56:32,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:32,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263252265] [2022-11-16 11:56:32,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263252265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:32,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:32,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:32,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123906941] [2022-11-16 11:56:32,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:32,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:32,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:56:32,185 INFO L87 Difference]: Start difference. First operand 17586 states and 19598 transitions. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 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) [2022-11-16 11:56:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:33,493 INFO L93 Difference]: Finished difference Result 40697 states and 45251 transitions. [2022-11-16 11:56:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:33,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 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 414 [2022-11-16 11:56:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:33,513 INFO L225 Difference]: With dead ends: 40697 [2022-11-16 11:56:33,513 INFO L226 Difference]: Without dead ends: 23481 [2022-11-16 11:56:33,521 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 [2022-11-16 11:56:33,522 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 197 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:33,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 68 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:56:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23481 states. [2022-11-16 11:56:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23481 to 22188. [2022-11-16 11:56:33,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22188 states, 22187 states have (on average 1.1116870239329337) internal successors, (24665), 22187 states have internal predecessors, (24665), 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) [2022-11-16 11:56:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22188 states to 22188 states and 24665 transitions. [2022-11-16 11:56:33,744 INFO L78 Accepts]: Start accepts. Automaton has 22188 states and 24665 transitions. Word has length 414 [2022-11-16 11:56:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:33,744 INFO L495 AbstractCegarLoop]: Abstraction has 22188 states and 24665 transitions. [2022-11-16 11:56:33,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 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) [2022-11-16 11:56:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 22188 states and 24665 transitions. [2022-11-16 11:56:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2022-11-16 11:56:33,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:33,755 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:33,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:56:33,756 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:33,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1627853402, now seen corresponding path program 1 times [2022-11-16 11:56:33,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:33,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940308615] [2022-11-16 11:56:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:33,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 143 proven. 229 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-16 11:56:34,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:34,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940308615] [2022-11-16 11:56:34,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940308615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:34,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866390464] [2022-11-16 11:56:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:34,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:34,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:34,267 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:34,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:56:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:34,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:56:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 248 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:36,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 248 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:39,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866390464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:39,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:39,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-11-16 11:56:39,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52487023] [2022-11-16 11:56:39,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:39,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:56:39,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:39,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:56:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:56:39,864 INFO L87 Difference]: Start difference. First operand 22188 states and 24665 transitions. Second operand has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 11 states have internal predecessors, (970), 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) [2022-11-16 11:56:48,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:48,046 INFO L93 Difference]: Finished difference Result 59594 states and 65952 transitions. [2022-11-16 11:56:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:56:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 11 states have internal predecessors, (970), 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 417 [2022-11-16 11:56:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:48,081 INFO L225 Difference]: With dead ends: 59594 [2022-11-16 11:56:48,082 INFO L226 Difference]: Without dead ends: 37408 [2022-11-16 11:56:48,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=1011, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:56:48,095 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4973 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 5984 mSolverCounterSat, 1128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4973 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 7112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1128 IncrementalHoareTripleChecker+Valid, 5984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:48,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4973 Valid, 163 Invalid, 7112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1128 Valid, 5984 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-16 11:56:48,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37408 states. [2022-11-16 11:56:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37408 to 24197. [2022-11-16 11:56:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24197 states, 24196 states have (on average 1.0857993056703588) internal successors, (26272), 24196 states have internal predecessors, (26272), 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) [2022-11-16 11:56:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24197 states to 24197 states and 26272 transitions. [2022-11-16 11:56:48,493 INFO L78 Accepts]: Start accepts. Automaton has 24197 states and 26272 transitions. Word has length 417 [2022-11-16 11:56:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:48,493 INFO L495 AbstractCegarLoop]: Abstraction has 24197 states and 26272 transitions. [2022-11-16 11:56:48,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 80.83333333333333) internal successors, (970), 11 states have internal predecessors, (970), 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) [2022-11-16 11:56:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 24197 states and 26272 transitions. [2022-11-16 11:56:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-11-16 11:56:48,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:48,507 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:48,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:48,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:48,713 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:48,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1101386183, now seen corresponding path program 1 times [2022-11-16 11:56:48,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:48,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617221829] [2022-11-16 11:56:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:48,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 517 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-16 11:56:49,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:49,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617221829] [2022-11-16 11:56:49,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617221829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:49,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:49,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:49,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144931967] [2022-11-16 11:56:49,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:49,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:49,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:49,306 INFO L87 Difference]: Start difference. First operand 24197 states and 26272 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2022-11-16 11:56:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:50,245 INFO L93 Difference]: Finished difference Result 47669 states and 51805 transitions. [2022-11-16 11:56:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:50,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 511 [2022-11-16 11:56:50,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:50,289 INFO L225 Difference]: With dead ends: 47669 [2022-11-16 11:56:50,289 INFO L226 Difference]: Without dead ends: 25316 [2022-11-16 11:56:50,300 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 [2022-11-16 11:56:50,301 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 66 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:50,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 158 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:56:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25316 states. [2022-11-16 11:56:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25316 to 23451. [2022-11-16 11:56:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23451 states, 23450 states have (on average 1.0833262260127932) internal successors, (25404), 23450 states have internal predecessors, (25404), 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) [2022-11-16 11:56:50,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 25404 transitions. [2022-11-16 11:56:50,637 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 25404 transitions. Word has length 511 [2022-11-16 11:56:50,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:50,638 INFO L495 AbstractCegarLoop]: Abstraction has 23451 states and 25404 transitions. [2022-11-16 11:56:50,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2022-11-16 11:56:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 25404 transitions. [2022-11-16 11:56:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-11-16 11:56:50,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:50,647 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:50,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 11:56:50,647 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:50,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1677270036, now seen corresponding path program 1 times [2022-11-16 11:56:50,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:50,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877322408] [2022-11-16 11:56:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:50,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 514 proven. 3 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-16 11:56:51,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:51,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877322408] [2022-11-16 11:56:51,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877322408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276070086] [2022-11-16 11:56:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:51,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:51,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:51,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:51,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:56:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:56:51,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 517 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-11-16 11:56:52,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:56:52,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276070086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:52,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:56:52,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-16 11:56:52,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873183225] [2022-11-16 11:56:52,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:52,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:56:52,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:52,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:56:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:56:52,160 INFO L87 Difference]: Start difference. First operand 23451 states and 25404 transitions. Second operand has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 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) [2022-11-16 11:56:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:53,439 INFO L93 Difference]: Finished difference Result 47443 states and 51428 transitions. [2022-11-16 11:56:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:56:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 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 512 [2022-11-16 11:56:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:53,460 INFO L225 Difference]: With dead ends: 47443 [2022-11-16 11:56:53,460 INFO L226 Difference]: Without dead ends: 24178 [2022-11-16 11:56:53,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:56:53,469 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 261 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:53,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 140 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:56:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24178 states. [2022-11-16 11:56:53,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24178 to 22149. [2022-11-16 11:56:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22149 states, 22148 states have (on average 1.0789236048401663) internal successors, (23896), 22148 states have internal predecessors, (23896), 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) [2022-11-16 11:56:53,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22149 states to 22149 states and 23896 transitions. [2022-11-16 11:56:53,821 INFO L78 Accepts]: Start accepts. Automaton has 22149 states and 23896 transitions. Word has length 512 [2022-11-16 11:56:53,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:53,821 INFO L495 AbstractCegarLoop]: Abstraction has 22149 states and 23896 transitions. [2022-11-16 11:56:53,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.75) internal successors, (311), 4 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) [2022-11-16 11:56:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 22149 states and 23896 transitions. [2022-11-16 11:56:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-11-16 11:56:53,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:53,831 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:53,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:54,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 11:56:54,032 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:54,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:54,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1808437552, now seen corresponding path program 1 times [2022-11-16 11:56:54,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:54,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016277207] [2022-11-16 11:56:54,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:54,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 609 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:55,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:55,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016277207] [2022-11-16 11:56:55,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016277207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:55,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230770695] [2022-11-16 11:56:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:55,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:55,839 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:55,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:56:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:56:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 696 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-16 11:56:56,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:56:56,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230770695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:56,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:56:56,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-11-16 11:56:56,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337930601] [2022-11-16 11:56:56,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:56,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:56,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:56:56,239 INFO L87 Difference]: Start difference. First operand 22149 states and 23896 transitions. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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) [2022-11-16 11:56:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:57,166 INFO L93 Difference]: Finished difference Result 44489 states and 47969 transitions. [2022-11-16 11:56:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 539 [2022-11-16 11:56:57,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:57,187 INFO L225 Difference]: With dead ends: 44489 [2022-11-16 11:56:57,187 INFO L226 Difference]: Without dead ends: 24184 [2022-11-16 11:56:57,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:56:57,195 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 91 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:57,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 338 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:56:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24184 states. [2022-11-16 11:56:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24184 to 21781. [2022-11-16 11:56:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21781 states, 21780 states have (on average 1.0793388429752067) internal successors, (23508), 21780 states have internal predecessors, (23508), 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) [2022-11-16 11:56:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21781 states to 21781 states and 23508 transitions. [2022-11-16 11:56:57,540 INFO L78 Accepts]: Start accepts. Automaton has 21781 states and 23508 transitions. Word has length 539 [2022-11-16 11:56:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:57,540 INFO L495 AbstractCegarLoop]: Abstraction has 21781 states and 23508 transitions. [2022-11-16 11:56:57,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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) [2022-11-16 11:56:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 21781 states and 23508 transitions. [2022-11-16 11:56:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-11-16 11:56:57,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:57,557 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:57,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-16 11:56:57,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:57,762 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:57,763 INFO L85 PathProgramCache]: Analyzing trace with hash 27903080, now seen corresponding path program 1 times [2022-11-16 11:56:57,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:57,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653489961] [2022-11-16 11:56:57,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:57,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 191 proven. 406 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-11-16 11:56:58,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:58,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653489961] [2022-11-16 11:56:58,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653489961] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:58,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351886440] [2022-11-16 11:56:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:58,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:58,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:58,439 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:58,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:56:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:56:58,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 241 proven. 454 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-16 11:56:59,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 191 proven. 406 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-11-16 11:57:01,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351886440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:01,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:01,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2022-11-16 11:57:01,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893752780] [2022-11-16 11:57:01,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:01,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:01,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:01,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:01,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:01,705 INFO L87 Difference]: Start difference. First operand 21781 states and 23508 transitions. Second operand has 10 states, 10 states have (on average 80.6) internal successors, (806), 9 states have internal predecessors, (806), 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) [2022-11-16 11:57:05,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:05,514 INFO L93 Difference]: Finished difference Result 39484 states and 42402 transitions. [2022-11-16 11:57:05,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:57:05,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 80.6) internal successors, (806), 9 states have internal predecessors, (806), 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 572 [2022-11-16 11:57:05,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:05,543 INFO L225 Difference]: With dead ends: 39484 [2022-11-16 11:57:05,543 INFO L226 Difference]: Without dead ends: 39482 [2022-11-16 11:57:05,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:05,551 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 983 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 4160 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 4517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 4160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:05,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 174 Invalid, 4517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 4160 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:57:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39482 states. [2022-11-16 11:57:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39482 to 14037. [2022-11-16 11:57:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14037 states, 14036 states have (on average 1.0807922485038473) internal successors, (15170), 14036 states have internal predecessors, (15170), 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) [2022-11-16 11:57:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14037 states to 14037 states and 15170 transitions. [2022-11-16 11:57:05,955 INFO L78 Accepts]: Start accepts. Automaton has 14037 states and 15170 transitions. Word has length 572 [2022-11-16 11:57:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:05,956 INFO L495 AbstractCegarLoop]: Abstraction has 14037 states and 15170 transitions. [2022-11-16 11:57:05,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.6) internal successors, (806), 9 states have internal predecessors, (806), 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) [2022-11-16 11:57:05,956 INFO L276 IsEmpty]: Start isEmpty. Operand 14037 states and 15170 transitions. [2022-11-16 11:57:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2022-11-16 11:57:05,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:05,972 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:05,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:06,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:06,178 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:06,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1930042227, now seen corresponding path program 1 times [2022-11-16 11:57:06,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:06,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213572626] [2022-11-16 11:57:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 902 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-16 11:57:06,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:06,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213572626] [2022-11-16 11:57:06,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213572626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:06,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:06,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:06,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606378193] [2022-11-16 11:57:06,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:06,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:06,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:06,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:06,912 INFO L87 Difference]: Start difference. First operand 14037 states and 15170 transitions. Second operand has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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) [2022-11-16 11:57:08,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:08,254 INFO L93 Difference]: Finished difference Result 31214 states and 33634 transitions. [2022-11-16 11:57:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:08,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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 586 [2022-11-16 11:57:08,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:08,266 INFO L225 Difference]: With dead ends: 31214 [2022-11-16 11:57:08,267 INFO L226 Difference]: Without dead ends: 16441 [2022-11-16 11:57:08,272 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 [2022-11-16 11:57:08,273 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 198 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:08,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 63 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:57:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16441 states. [2022-11-16 11:57:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16441 to 14221. [2022-11-16 11:57:08,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14221 states, 14220 states have (on average 1.0791139240506329) internal successors, (15345), 14220 states have internal predecessors, (15345), 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) [2022-11-16 11:57:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14221 states to 14221 states and 15345 transitions. [2022-11-16 11:57:08,508 INFO L78 Accepts]: Start accepts. Automaton has 14221 states and 15345 transitions. Word has length 586 [2022-11-16 11:57:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:08,509 INFO L495 AbstractCegarLoop]: Abstraction has 14221 states and 15345 transitions. [2022-11-16 11:57:08,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.0) internal successors, (364), 3 states have internal predecessors, (364), 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) [2022-11-16 11:57:08,509 INFO L276 IsEmpty]: Start isEmpty. Operand 14221 states and 15345 transitions. [2022-11-16 11:57:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 705 [2022-11-16 11:57:08,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:08,521 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:08,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 11:57:08,521 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:08,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1100874474, now seen corresponding path program 1 times [2022-11-16 11:57:08,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:08,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207253635] [2022-11-16 11:57:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:08,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 890 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2022-11-16 11:57:09,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:09,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207253635] [2022-11-16 11:57:09,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207253635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:09,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:09,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:09,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625813250] [2022-11-16 11:57:09,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:09,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:09,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:09,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:09,265 INFO L87 Difference]: Start difference. First operand 14221 states and 15345 transitions. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2022-11-16 11:57:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:10,189 INFO L93 Difference]: Finished difference Result 28994 states and 31152 transitions. [2022-11-16 11:57:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 704 [2022-11-16 11:57:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:10,203 INFO L225 Difference]: With dead ends: 28994 [2022-11-16 11:57:10,203 INFO L226 Difference]: Without dead ends: 14775 [2022-11-16 11:57:10,209 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 [2022-11-16 11:57:10,210 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 123 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:10,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 63 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:57:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2022-11-16 11:57:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 12747. [2022-11-16 11:57:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12747 states, 12746 states have (on average 1.0731994351168994) internal successors, (13679), 12746 states have internal predecessors, (13679), 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) [2022-11-16 11:57:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12747 states to 12747 states and 13679 transitions. [2022-11-16 11:57:10,370 INFO L78 Accepts]: Start accepts. Automaton has 12747 states and 13679 transitions. Word has length 704 [2022-11-16 11:57:10,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:10,371 INFO L495 AbstractCegarLoop]: Abstraction has 12747 states and 13679 transitions. [2022-11-16 11:57:10,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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) [2022-11-16 11:57:10,371 INFO L276 IsEmpty]: Start isEmpty. Operand 12747 states and 13679 transitions. [2022-11-16 11:57:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 802 [2022-11-16 11:57:10,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:10,384 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:10,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 11:57:10,384 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:10,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1575602108, now seen corresponding path program 1 times [2022-11-16 11:57:10,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:10,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771236632] [2022-11-16 11:57:10,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:10,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 1539 proven. 237 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2022-11-16 11:57:11,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:11,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771236632] [2022-11-16 11:57:11,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771236632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:11,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749110264] [2022-11-16 11:57:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:11,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:11,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:11,567 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:11,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:57:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:11,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:57:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2319 backedges. 1632 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2022-11-16 11:57:12,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:57:12,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749110264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:12,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:57:12,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-16 11:57:12,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833257289] [2022-11-16 11:57:12,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:12,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:12,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:12,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:12,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:12,035 INFO L87 Difference]: Start difference. First operand 12747 states and 13679 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2022-11-16 11:57:12,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:12,862 INFO L93 Difference]: Finished difference Result 25495 states and 27359 transitions. [2022-11-16 11:57:12,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:12,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 801 [2022-11-16 11:57:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:12,872 INFO L225 Difference]: With dead ends: 25495 [2022-11-16 11:57:12,872 INFO L226 Difference]: Without dead ends: 12750 [2022-11-16 11:57:12,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:12,877 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:12,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 320 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:57:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12750 states. [2022-11-16 11:57:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12750 to 12747. [2022-11-16 11:57:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12747 states, 12746 states have (on average 1.0620586850776714) internal successors, (13537), 12746 states have internal predecessors, (13537), 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) [2022-11-16 11:57:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12747 states to 12747 states and 13537 transitions. [2022-11-16 11:57:13,021 INFO L78 Accepts]: Start accepts. Automaton has 12747 states and 13537 transitions. Word has length 801 [2022-11-16 11:57:13,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:13,021 INFO L495 AbstractCegarLoop]: Abstraction has 12747 states and 13537 transitions. [2022-11-16 11:57:13,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2022-11-16 11:57:13,022 INFO L276 IsEmpty]: Start isEmpty. Operand 12747 states and 13537 transitions. [2022-11-16 11:57:13,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2022-11-16 11:57:13,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:13,031 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 5, 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, 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] [2022-11-16 11:57:13,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:13,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 11:57:13,232 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1565644488, now seen corresponding path program 1 times [2022-11-16 11:57:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:13,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933861336] [2022-11-16 11:57:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:13,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:13,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 1314 proven. 73 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-11-16 11:57:14,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:14,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933861336] [2022-11-16 11:57:14,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933861336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:14,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970133259] [2022-11-16 11:57:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:14,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:14,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:14,765 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:14,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:57:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:15,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:57:15,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 975 proven. 496 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2022-11-16 11:57:17,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 975 proven. 496 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2022-11-16 11:57:21,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970133259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:21,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:21,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2022-11-16 11:57:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028072525] [2022-11-16 11:57:21,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:21,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:57:21,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:57:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:57:21,258 INFO L87 Difference]: Start difference. First operand 12747 states and 13537 transitions. Second operand has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 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) [2022-11-16 11:57:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:29,441 INFO L93 Difference]: Finished difference Result 32910 states and 34907 transitions. [2022-11-16 11:57:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-16 11:57:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 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 835 [2022-11-16 11:57:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:29,454 INFO L225 Difference]: With dead ends: 32910 [2022-11-16 11:57:29,454 INFO L226 Difference]: Without dead ends: 20165 [2022-11-16 11:57:29,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1725 GetRequests, 1686 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1191, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:57:29,458 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 5785 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 7861 mSolverCounterSat, 1116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5785 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 8977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1116 IncrementalHoareTripleChecker+Valid, 7861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:29,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5785 Valid, 196 Invalid, 8977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1116 Valid, 7861 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-16 11:57:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20165 states. [2022-11-16 11:57:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20165 to 9605. [2022-11-16 11:57:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 1.0599750104123282) internal successors, (10180), 9604 states have internal predecessors, (10180), 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) [2022-11-16 11:57:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 10180 transitions. [2022-11-16 11:57:29,618 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 10180 transitions. Word has length 835 [2022-11-16 11:57:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:29,619 INFO L495 AbstractCegarLoop]: Abstraction has 9605 states and 10180 transitions. [2022-11-16 11:57:29,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.53846153846153) internal successors, (1281), 13 states have internal predecessors, (1281), 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) [2022-11-16 11:57:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 10180 transitions. [2022-11-16 11:57:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2022-11-16 11:57:29,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:29,629 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 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, 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] [2022-11-16 11:57:29,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:29,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c520b273-03a4-4d3e-ab37-4c398c8f1135/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:57:29,830 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1907753503, now seen corresponding path program 1 times [2022-11-16 11:57:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:29,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013215593] [2022-11-16 11:57:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:29,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2440 backedges. 1638 proven. 0 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2022-11-16 11:57:30,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:30,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013215593] [2022-11-16 11:57:30,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013215593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:30,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:30,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:30,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638165780] [2022-11-16 11:57:30,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:30,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:30,843 INFO L87 Difference]: Start difference. First operand 9605 states and 10180 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2022-11-16 11:57:31,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:31,694 INFO L93 Difference]: Finished difference Result 19394 states and 20565 transitions. [2022-11-16 11:57:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:31,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 892 [2022-11-16 11:57:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:31,702 INFO L225 Difference]: With dead ends: 19394 [2022-11-16 11:57:31,702 INFO L226 Difference]: Without dead ends: 10343 [2022-11-16 11:57:31,706 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 [2022-11-16 11:57:31,707 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 123 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:31,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 122 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:57:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10343 states. [2022-11-16 11:57:31,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10343 to 9605. [2022-11-16 11:57:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9605 states, 9604 states have (on average 1.059454394002499) internal successors, (10175), 9604 states have internal predecessors, (10175), 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) [2022-11-16 11:57:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9605 states to 9605 states and 10175 transitions. [2022-11-16 11:57:31,831 INFO L78 Accepts]: Start accepts. Automaton has 9605 states and 10175 transitions. Word has length 892 [2022-11-16 11:57:31,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:31,831 INFO L495 AbstractCegarLoop]: Abstraction has 9605 states and 10175 transitions. [2022-11-16 11:57:31,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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) [2022-11-16 11:57:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 9605 states and 10175 transitions. [2022-11-16 11:57:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2022-11-16 11:57:31,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:31,843 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-11-16 11:57:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-16 11:57:31,844 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1710428929, now seen corresponding path program 1 times [2022-11-16 11:57:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:31,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641145922] [2022-11-16 11:57:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3097 backedges. 2039 proven. 0 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2022-11-16 11:57:32,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:32,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641145922] [2022-11-16 11:57:32,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641145922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:32,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:32,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:32,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690036968] [2022-11-16 11:57:32,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:32,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:32,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:32,347 INFO L87 Difference]: Start difference. First operand 9605 states and 10175 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) [2022-11-16 11:57:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:33,132 INFO L93 Difference]: Finished difference Result 19027 states and 20154 transitions. [2022-11-16 11:57:33,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:33,135 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 915 [2022-11-16 11:57:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:33,145 INFO L225 Difference]: With dead ends: 19027 [2022-11-16 11:57:33,145 INFO L226 Difference]: Without dead ends: 9792 [2022-11-16 11:57:33,150 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 [2022-11-16 11:57:33,151 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 112 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:33,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 335 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:57:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2022-11-16 11:57:33,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8685. [2022-11-16 11:57:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8685 states, 8684 states have (on average 1.0586135421464762) internal successors, (9193), 8684 states have internal predecessors, (9193), 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) [2022-11-16 11:57:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8685 states to 8685 states and 9193 transitions. [2022-11-16 11:57:33,272 INFO L78 Accepts]: Start accepts. Automaton has 8685 states and 9193 transitions. Word has length 915 [2022-11-16 11:57:33,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:33,273 INFO L495 AbstractCegarLoop]: Abstraction has 8685 states and 9193 transitions. [2022-11-16 11:57:33,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-16 11:57:33,273 INFO L276 IsEmpty]: Start isEmpty. Operand 8685 states and 9193 transitions. [2022-11-16 11:57:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2022-11-16 11:57:33,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:33,284 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:33,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 11:57:33,285 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:33,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1236626021, now seen corresponding path program 1 times [2022-11-16 11:57:33,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:33,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522669927] [2022-11-16 11:57:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:33,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:33,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4128 backedges. 2832 proven. 0 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2022-11-16 11:57:34,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:34,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522669927] [2022-11-16 11:57:34,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522669927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:34,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:34,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:57:34,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517226546] [2022-11-16 11:57:34,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:34,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:34,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:34,665 INFO L87 Difference]: Start difference. First operand 8685 states and 9193 transitions. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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) [2022-11-16 11:57:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:35,964 INFO L93 Difference]: Finished difference Result 19766 states and 20952 transitions. [2022-11-16 11:57:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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 1067 [2022-11-16 11:57:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:35,973 INFO L225 Difference]: With dead ends: 19766 [2022-11-16 11:57:35,973 INFO L226 Difference]: Without dead ends: 11635 [2022-11-16 11:57:35,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:35,978 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 182 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:35,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 102 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:57:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11635 states. [2022-11-16 11:57:36,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11635 to 10529. [2022-11-16 11:57:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10529 states, 10528 states have (on average 1.059365501519757) internal successors, (11153), 10528 states have internal predecessors, (11153), 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) [2022-11-16 11:57:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10529 states to 10529 states and 11153 transitions. [2022-11-16 11:57:36,182 INFO L78 Accepts]: Start accepts. Automaton has 10529 states and 11153 transitions. Word has length 1067 [2022-11-16 11:57:36,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:36,182 INFO L495 AbstractCegarLoop]: Abstraction has 10529 states and 11153 transitions. [2022-11-16 11:57:36,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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) [2022-11-16 11:57:36,182 INFO L276 IsEmpty]: Start isEmpty. Operand 10529 states and 11153 transitions. [2022-11-16 11:57:36,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1075 [2022-11-16 11:57:36,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:36,194 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 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, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:36,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-16 11:57:36,194 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:36,195 INFO L85 PathProgramCache]: Analyzing trace with hash -89935406, now seen corresponding path program 1 times [2022-11-16 11:57:36,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:36,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178044931] [2022-11-16 11:57:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:36,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3397 backedges. 2489 proven. 0 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2022-11-16 11:57:37,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:37,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178044931] [2022-11-16 11:57:37,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178044931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:37,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:37,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:57:37,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368582921] [2022-11-16 11:57:37,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:37,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:37,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:37,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:37,486 INFO L87 Difference]: Start difference. First operand 10529 states and 11153 transitions. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 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) [2022-11-16 11:57:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:38,523 INFO L93 Difference]: Finished difference Result 17175 states and 18177 transitions. [2022-11-16 11:57:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 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 1074 [2022-11-16 11:57:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:38,525 INFO L225 Difference]: With dead ends: 17175 [2022-11-16 11:57:38,525 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 11:57:38,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:38,530 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 202 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:38,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 33 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:57:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 11:57:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 11:57:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-11-16 11:57:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 11:57:38,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1074 [2022-11-16 11:57:38,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:38,531 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 11:57:38,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 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) [2022-11-16 11:57:38,532 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 11:57:38,532 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 11:57:38,534 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 11:57:38,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-16 11:57:38,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.