./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label56.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_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/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_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label56.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/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_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/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 6817325bf2ee6430e3e6b828534a0d98b8fcced6b8f752a4847958e1d99aaba4 --- 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 11:53:29,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:53:29,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:53:29,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:53:29,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:53:29,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:53:29,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:53:29,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:53:29,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:53:29,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:53:29,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:53:29,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:53:29,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:53:29,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:53:29,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:53:29,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:53:29,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:53:29,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:53:29,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:53:29,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:53:29,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:53:29,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:53:29,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:53:29,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:53:29,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:53:29,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:53:29,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:53:29,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:53:29,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:53:29,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:53:29,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:53:29,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:53:29,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:53:29,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:53:29,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:53:29,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:53:29,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:53:29,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:53:29,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:53:29,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:53:29,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:53:29,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:53:29,994 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:53:29,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:53:29,997 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:53:29,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:53:29,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:53:29,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:53:29,999 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:53:30,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:53:30,000 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:53:30,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:53:30,001 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:53:30,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:53:30,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:53:30,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:53:30,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:53:30,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:53:30,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:53:30,003 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:53:30,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:53:30,003 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:53:30,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:53:30,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:53:30,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:53:30,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:53:30,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:53:30,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:53:30,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:53:30,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:53:30,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:53:30,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:53:30,007 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:53:30,008 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:53:30,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:53:30,008 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_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6817325bf2ee6430e3e6b828534a0d98b8fcced6b8f752a4847958e1d99aaba4 [2022-11-16 11:53:30,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:53:30,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:53:30,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:53:30,339 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:53:30,339 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:53:30,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/eca-rers2012/Problem17_label56.c [2022-11-16 11:53:30,409 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/data/03795ea85/9e1347f410ff4459bf915ffd7bbba473/FLAGe0f6fefc4 [2022-11-16 11:53:31,175 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:53:31,176 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/sv-benchmarks/c/eca-rers2012/Problem17_label56.c [2022-11-16 11:53:31,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/data/03795ea85/9e1347f410ff4459bf915ffd7bbba473/FLAGe0f6fefc4 [2022-11-16 11:53:31,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/data/03795ea85/9e1347f410ff4459bf915ffd7bbba473 [2022-11-16 11:53:31,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:53:31,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:53:31,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:53:31,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:53:31,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:53:31,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:53:31" (1/1) ... [2022-11-16 11:53:31,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d1f659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:31, skipping insertion in model container [2022-11-16 11:53:31,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:53:31" (1/1) ... [2022-11-16 11:53:31,334 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:53:31,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:53:31,807 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_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/sv-benchmarks/c/eca-rers2012/Problem17_label56.c[9824,9837] [2022-11-16 11:53:32,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:53:32,631 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:53:32,669 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_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/sv-benchmarks/c/eca-rers2012/Problem17_label56.c[9824,9837] [2022-11-16 11:53:33,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:53:33,063 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:53:33,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33 WrapperNode [2022-11-16 11:53:33,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:53:33,066 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:53:33,066 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:53:33,066 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:53:33,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,429 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-11-16 11:53:33,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:53:33,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:53:33,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:53:33,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:53:33,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,750 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:53:33,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:53:33,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:53:33,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:53:33,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (1/1) ... [2022-11-16 11:53:33,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:53:33,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:53:33,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:53:33,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:53:33,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:53:33,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:53:33,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:53:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:53:33,948 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:53:33,950 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:53:38,344 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:53:38,356 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:53:38,356 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:53:38,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:53:38 BoogieIcfgContainer [2022-11-16 11:53:38,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:53:38,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:53:38,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:53:38,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:53:38,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:53:31" (1/3) ... [2022-11-16 11:53:38,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f59316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:53:38, skipping insertion in model container [2022-11-16 11:53:38,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:53:33" (2/3) ... [2022-11-16 11:53:38,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f59316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:53:38, skipping insertion in model container [2022-11-16 11:53:38,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:53:38" (3/3) ... [2022-11-16 11:53:38,369 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label56.c [2022-11-16 11:53:38,388 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:53:38,389 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:53:38,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:53:38,460 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;@a255686, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:53:38,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:53:38,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 11:53:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 11:53:38,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:38,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:38,477 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:38,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash -215114758, now seen corresponding path program 1 times [2022-11-16 11:53:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:38,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237135258] [2022-11-16 11:53:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:39,014 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 11:53:39,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:39,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237135258] [2022-11-16 11:53:39,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237135258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:53:39,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:53:39,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:53:39,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747321733] [2022-11-16 11:53:39,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:39,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:53:39,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:39,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:53:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:53:39,068 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 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 11:53:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:42,616 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2022-11-16 11:53:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:53:42,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2022-11-16 11:53:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:42,637 INFO L225 Difference]: With dead ends: 1644 [2022-11-16 11:53:42,637 INFO L226 Difference]: Without dead ends: 977 [2022-11-16 11:53:42,642 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 11:53:42,645 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 422 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:42,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-16 11:53:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-11-16 11:53:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2022-11-16 11:53:42,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 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 11:53:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2022-11-16 11:53:42,731 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 66 [2022-11-16 11:53:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:42,731 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2022-11-16 11:53:42,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 0 states have call successors, (0), 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 11:53:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2022-11-16 11:53:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-16 11:53:42,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:42,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:42,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:53:42,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:42,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:42,737 INFO L85 PathProgramCache]: Analyzing trace with hash -181115598, now seen corresponding path program 1 times [2022-11-16 11:53:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:42,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144223889] [2022-11-16 11:53:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:42,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:53:43,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:43,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144223889] [2022-11-16 11:53:43,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144223889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:53:43,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:53:43,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:53:43,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160209634] [2022-11-16 11:53:43,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:43,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:53:43,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:53:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:53:43,036 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 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 11:53:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:46,682 INFO L93 Difference]: Finished difference Result 2815 states and 4382 transitions. [2022-11-16 11:53:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:53:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2022-11-16 11:53:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:46,690 INFO L225 Difference]: With dead ends: 2815 [2022-11-16 11:53:46,690 INFO L226 Difference]: Without dead ends: 1846 [2022-11-16 11:53:46,693 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 11:53:46,695 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:46,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 580 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 1382 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-16 11:53:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2022-11-16 11:53:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1841. [2022-11-16 11:53:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.3505434782608696) internal successors, (2485), 1840 states have internal predecessors, (2485), 0 states have call successors, (0), 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 11:53:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2485 transitions. [2022-11-16 11:53:46,745 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2485 transitions. Word has length 133 [2022-11-16 11:53:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:46,746 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2485 transitions. [2022-11-16 11:53:46,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 2 states have internal predecessors, (133), 0 states have call successors, (0), 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 11:53:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2485 transitions. [2022-11-16 11:53:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-16 11:53:46,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:46,751 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:46,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:53:46,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:46,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:46,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1697817478, now seen corresponding path program 1 times [2022-11-16 11:53:46,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:46,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872902124] [2022-11-16 11:53:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:46,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:53:47,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:47,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872902124] [2022-11-16 11:53:47,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872902124] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:53:47,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:53:47,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:53:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830343739] [2022-11-16 11:53:47,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:47,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:53:47,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:53:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:53:47,029 INFO L87 Difference]: Start difference. First operand 1841 states and 2485 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 11:53:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:50,076 INFO L93 Difference]: Finished difference Result 4552 states and 6285 transitions. [2022-11-16 11:53:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:53:50,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2022-11-16 11:53:50,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:50,087 INFO L225 Difference]: With dead ends: 4552 [2022-11-16 11:53:50,087 INFO L226 Difference]: Without dead ends: 2713 [2022-11-16 11:53:50,090 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 11:53:50,091 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 441 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:50,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 11:53:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-11-16 11:53:50,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2022-11-16 11:53:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3007380073800738) internal successors, (3525), 2710 states have internal predecessors, (3525), 0 states have call successors, (0), 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 11:53:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3525 transitions. [2022-11-16 11:53:50,146 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3525 transitions. Word has length 136 [2022-11-16 11:53:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:50,147 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3525 transitions. [2022-11-16 11:53:50,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 11:53:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3525 transitions. [2022-11-16 11:53:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-16 11:53:50,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:50,151 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, 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] [2022-11-16 11:53:50,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:53:50,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:50,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:50,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2021649633, now seen corresponding path program 1 times [2022-11-16 11:53:50,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:50,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158965555] [2022-11-16 11:53:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:50,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:50,399 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 11:53:50,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:50,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158965555] [2022-11-16 11:53:50,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158965555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:53:50,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:53:50,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:53:50,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503405303] [2022-11-16 11:53:50,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:50,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:53:50,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:50,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:53:50,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:53:50,403 INFO L87 Difference]: Start difference. First operand 2711 states and 3525 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 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 11:53:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:53,157 INFO L93 Difference]: Finished difference Result 7984 states and 10364 transitions. [2022-11-16 11:53:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:53:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 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 205 [2022-11-16 11:53:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:53,172 INFO L225 Difference]: With dead ends: 7984 [2022-11-16 11:53:53,172 INFO L226 Difference]: Without dead ends: 4421 [2022-11-16 11:53:53,177 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 11:53:53,178 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:53,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 11:53:53,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2022-11-16 11:53:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3566. [2022-11-16 11:53:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 1.1778401122019635) internal successors, (4199), 3565 states have internal predecessors, (4199), 0 states have call successors, (0), 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 11:53:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 4199 transitions. [2022-11-16 11:53:53,253 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 4199 transitions. Word has length 205 [2022-11-16 11:53:53,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:53,254 INFO L495 AbstractCegarLoop]: Abstraction has 3566 states and 4199 transitions. [2022-11-16 11:53:53,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 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 11:53:53,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 4199 transitions. [2022-11-16 11:53:53,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-11-16 11:53:53,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:53,257 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, 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] [2022-11-16 11:53:53,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:53:53,258 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:53,259 INFO L85 PathProgramCache]: Analyzing trace with hash 546947933, now seen corresponding path program 1 times [2022-11-16 11:53:53,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:53,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675017486] [2022-11-16 11:53:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:53:53,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:53,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675017486] [2022-11-16 11:53:53,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675017486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:53:53,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:53:53,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:53:53,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737089083] [2022-11-16 11:53:53,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:53,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:53:53,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:53:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:53:53,543 INFO L87 Difference]: Start difference. First operand 3566 states and 4199 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 11:53:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:55,956 INFO L93 Difference]: Finished difference Result 9263 states and 11078 transitions. [2022-11-16 11:53:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:53:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 218 [2022-11-16 11:53:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:55,974 INFO L225 Difference]: With dead ends: 9263 [2022-11-16 11:53:55,975 INFO L226 Difference]: Without dead ends: 5699 [2022-11-16 11:53:55,979 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 11:53:55,980 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:55,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-16 11:53:55,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5699 states. [2022-11-16 11:53:56,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5699 to 5699. [2022-11-16 11:53:56,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5699 states, 5698 states have (on average 1.1597051597051597) internal successors, (6608), 5698 states have internal predecessors, (6608), 0 states have call successors, (0), 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 11:53:56,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5699 states to 5699 states and 6608 transitions. [2022-11-16 11:53:56,109 INFO L78 Accepts]: Start accepts. Automaton has 5699 states and 6608 transitions. Word has length 218 [2022-11-16 11:53:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:56,111 INFO L495 AbstractCegarLoop]: Abstraction has 5699 states and 6608 transitions. [2022-11-16 11:53:56,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 11:53:56,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5699 states and 6608 transitions. [2022-11-16 11:53:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-11-16 11:53:56,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:56,118 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, 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] [2022-11-16 11:53:56,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:53:56,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:53:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash 754737944, now seen corresponding path program 1 times [2022-11-16 11:53:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:56,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162106919] [2022-11-16 11:53:56,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:56,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:56,649 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:53:56,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162106919] [2022-11-16 11:53:56,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162106919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:53:56,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961926665] [2022-11-16 11:53:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:56,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:53:56,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:53:56,656 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:53:56,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:53:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:56,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:53:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:53:57,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:53:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:53:57,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961926665] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:53:57,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:53:57,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-11-16 11:53:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335575911] [2022-11-16 11:53:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:57,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:53:57,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:53:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:53:57,781 INFO L87 Difference]: Start difference. First operand 5699 states and 6608 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 11:54:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:02,449 INFO L93 Difference]: Finished difference Result 16961 states and 19953 transitions. [2022-11-16 11:54:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:54:02,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2022-11-16 11:54:02,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:02,478 INFO L225 Difference]: With dead ends: 16961 [2022-11-16 11:54:02,478 INFO L226 Difference]: Without dead ends: 10384 [2022-11-16 11:54:02,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 435 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:54:02,488 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1049 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 1044 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 3227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1044 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:02,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1049 Valid, 152 Invalid, 3227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1044 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-16 11:54:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10384 states. [2022-11-16 11:54:02,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10384 to 10379. [2022-11-16 11:54:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10378 states have (on average 1.1553285796878012) internal successors, (11990), 10378 states have internal predecessors, (11990), 0 states have call successors, (0), 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 11:54:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 11990 transitions. [2022-11-16 11:54:02,686 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 11990 transitions. Word has length 220 [2022-11-16 11:54:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:02,686 INFO L495 AbstractCegarLoop]: Abstraction has 10379 states and 11990 transitions. [2022-11-16 11:54:02,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 11:54:02,687 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 11990 transitions. [2022-11-16 11:54:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-11-16 11:54:02,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:02,692 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:02,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:02,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:54:02,898 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1820760982, now seen corresponding path program 1 times [2022-11-16 11:54:02,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:02,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190404730] [2022-11-16 11:54:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:02,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 191 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:03,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:03,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190404730] [2022-11-16 11:54:03,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190404730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:03,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103473032] [2022-11-16 11:54:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:03,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:03,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:03,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:03,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:54:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:03,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:54:03,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 268 proven. 73 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 11:54:04,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 11:54:04,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103473032] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:04,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:54:04,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 6 [2022-11-16 11:54:04,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740887041] [2022-11-16 11:54:04,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:04,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:04,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:04,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:04,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:54:04,462 INFO L87 Difference]: Start difference. First operand 10379 states and 11990 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 11:54:08,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:08,631 INFO L93 Difference]: Finished difference Result 28865 states and 33388 transitions. [2022-11-16 11:54:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:54:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 294 [2022-11-16 11:54:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:08,670 INFO L225 Difference]: With dead ends: 28865 [2022-11-16 11:54:08,670 INFO L226 Difference]: Without dead ends: 18488 [2022-11-16 11:54:08,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 583 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:54:08,682 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 883 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:08,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 171 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-16 11:54:08,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18488 states. [2022-11-16 11:54:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18488 to 18482. [2022-11-16 11:54:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18482 states, 18481 states have (on average 1.1429035225366593) internal successors, (21122), 18481 states have internal predecessors, (21122), 0 states have call successors, (0), 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 11:54:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18482 states to 18482 states and 21122 transitions. [2022-11-16 11:54:09,014 INFO L78 Accepts]: Start accepts. Automaton has 18482 states and 21122 transitions. Word has length 294 [2022-11-16 11:54:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:09,015 INFO L495 AbstractCegarLoop]: Abstraction has 18482 states and 21122 transitions. [2022-11-16 11:54:09,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 11:54:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 18482 states and 21122 transitions. [2022-11-16 11:54:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-11-16 11:54:09,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:09,025 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, 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, 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 11:54:09,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:09,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:54:09,231 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash -729878076, now seen corresponding path program 1 times [2022-11-16 11:54:09,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:09,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303208090] [2022-11-16 11:54:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:09,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:09,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 550 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-16 11:54:09,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303208090] [2022-11-16 11:54:09,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303208090] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:09,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:09,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:09,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447808017] [2022-11-16 11:54:09,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:09,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:09,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:54:09,740 INFO L87 Difference]: Start difference. First operand 18482 states and 21122 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 11:54:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:12,349 INFO L93 Difference]: Finished difference Result 50636 states and 57339 transitions. [2022-11-16 11:54:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:12,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 399 [2022-11-16 11:54:12,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:12,538 INFO L225 Difference]: With dead ends: 50636 [2022-11-16 11:54:12,539 INFO L226 Difference]: Without dead ends: 32156 [2022-11-16 11:54:12,548 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 11:54:12,549 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 426 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:12,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 669 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 11:54:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32156 states. [2022-11-16 11:54:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32156 to 29570. [2022-11-16 11:54:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29570 states, 29569 states have (on average 1.131117048260002) internal successors, (33446), 29569 states have internal predecessors, (33446), 0 states have call successors, (0), 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 11:54:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29570 states to 29570 states and 33446 transitions. [2022-11-16 11:54:13,010 INFO L78 Accepts]: Start accepts. Automaton has 29570 states and 33446 transitions. Word has length 399 [2022-11-16 11:54:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:13,011 INFO L495 AbstractCegarLoop]: Abstraction has 29570 states and 33446 transitions. [2022-11-16 11:54:13,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 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 11:54:13,011 INFO L276 IsEmpty]: Start isEmpty. Operand 29570 states and 33446 transitions. [2022-11-16 11:54:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-11-16 11:54:13,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:13,022 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, 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, 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 11:54:13,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:54:13,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:13,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1745983289, now seen corresponding path program 1 times [2022-11-16 11:54:13,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:13,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500289584] [2022-11-16 11:54:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:13,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 567 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-16 11:54:13,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:13,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500289584] [2022-11-16 11:54:13,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500289584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:13,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:13,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:13,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698942408] [2022-11-16 11:54:13,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:13,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:13,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:13,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:54:13,608 INFO L87 Difference]: Start difference. First operand 29570 states and 33446 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 11:54:16,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:16,293 INFO L93 Difference]: Finished difference Result 68521 states and 77908 transitions. [2022-11-16 11:54:16,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:16,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 400 [2022-11-16 11:54:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:16,346 INFO L225 Difference]: With dead ends: 68521 [2022-11-16 11:54:16,347 INFO L226 Difference]: Without dead ends: 38952 [2022-11-16 11:54:16,369 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 11:54:16,369 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 436 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:16,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 642 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 11:54:16,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38952 states. [2022-11-16 11:54:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38952 to 36818. [2022-11-16 11:54:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36818 states, 36817 states have (on average 1.1341228236955754) internal successors, (41755), 36817 states have internal predecessors, (41755), 0 states have call successors, (0), 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 11:54:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36818 states to 36818 states and 41755 transitions. [2022-11-16 11:54:17,024 INFO L78 Accepts]: Start accepts. Automaton has 36818 states and 41755 transitions. Word has length 400 [2022-11-16 11:54:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:17,024 INFO L495 AbstractCegarLoop]: Abstraction has 36818 states and 41755 transitions. [2022-11-16 11:54:17,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 11:54:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 36818 states and 41755 transitions. [2022-11-16 11:54:17,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2022-11-16 11:54:17,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:17,044 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, 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, 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 11:54:17,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:54:17,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:17,045 INFO L85 PathProgramCache]: Analyzing trace with hash -898319440, now seen corresponding path program 1 times [2022-11-16 11:54:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:17,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114644201] [2022-11-16 11:54:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:17,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-16 11:54:17,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114644201] [2022-11-16 11:54:17,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114644201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:17,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:17,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:54:17,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263826967] [2022-11-16 11:54:17,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:17,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:17,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:17,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:17,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:17,736 INFO L87 Difference]: Start difference. First operand 36818 states and 41755 transitions. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 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 11:54:21,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:21,756 INFO L93 Difference]: Finished difference Result 99668 states and 112882 transitions. [2022-11-16 11:54:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:54:21,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 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 404 [2022-11-16 11:54:21,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:21,831 INFO L225 Difference]: With dead ends: 99668 [2022-11-16 11:54:21,832 INFO L226 Difference]: Without dead ends: 62852 [2022-11-16 11:54:21,849 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 11:54:21,850 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 818 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:21,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 199 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-16 11:54:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62852 states. [2022-11-16 11:54:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62852 to 57736. [2022-11-16 11:54:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57736 states, 57735 states have (on average 1.1359660517883432) internal successors, (65585), 57735 states have internal predecessors, (65585), 0 states have call successors, (0), 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 11:54:22,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57736 states to 57736 states and 65585 transitions. [2022-11-16 11:54:22,849 INFO L78 Accepts]: Start accepts. Automaton has 57736 states and 65585 transitions. Word has length 404 [2022-11-16 11:54:22,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:22,850 INFO L495 AbstractCegarLoop]: Abstraction has 57736 states and 65585 transitions. [2022-11-16 11:54:22,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 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 11:54:22,851 INFO L276 IsEmpty]: Start isEmpty. Operand 57736 states and 65585 transitions. [2022-11-16 11:54:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-11-16 11:54:22,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:22,865 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:22,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:54:22,865 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:22,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:22,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2027173808, now seen corresponding path program 1 times [2022-11-16 11:54:22,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:22,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669593470] [2022-11-16 11:54:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:22,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:54:23,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:23,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669593470] [2022-11-16 11:54:23,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669593470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:23,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:23,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:23,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328277316] [2022-11-16 11:54:23,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:23,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:23,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:23,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:23,481 INFO L87 Difference]: Start difference. First operand 57736 states and 65585 transitions. Second operand has 4 states, 4 states have (on average 101.25) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 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 11:54:27,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:27,010 INFO L93 Difference]: Finished difference Result 120145 states and 136110 transitions. [2022-11-16 11:54:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:54:27,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 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 405 [2022-11-16 11:54:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:27,177 INFO L225 Difference]: With dead ends: 120145 [2022-11-16 11:54:27,193 INFO L226 Difference]: Without dead ends: 61986 [2022-11-16 11:54:27,228 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 11:54:27,229 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 547 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:27,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 249 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 11:54:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61986 states. [2022-11-16 11:54:28,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61986 to 58161. [2022-11-16 11:54:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58161 states, 58160 states have (on average 1.1350068775790922) internal successors, (66012), 58160 states have internal predecessors, (66012), 0 states have call successors, (0), 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 11:54:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58161 states to 58161 states and 66012 transitions. [2022-11-16 11:54:28,347 INFO L78 Accepts]: Start accepts. Automaton has 58161 states and 66012 transitions. Word has length 405 [2022-11-16 11:54:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:28,348 INFO L495 AbstractCegarLoop]: Abstraction has 58161 states and 66012 transitions. [2022-11-16 11:54:28,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 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 11:54:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 58161 states and 66012 transitions. [2022-11-16 11:54:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-11-16 11:54:28,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:28,354 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, 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, 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] [2022-11-16 11:54:28,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:54:28,354 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:28,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:28,355 INFO L85 PathProgramCache]: Analyzing trace with hash -626004042, now seen corresponding path program 1 times [2022-11-16 11:54:28,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:28,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514291041] [2022-11-16 11:54:28,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:28,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 403 proven. 64 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-11-16 11:54:29,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:29,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514291041] [2022-11-16 11:54:29,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514291041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:29,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270674868] [2022-11-16 11:54:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:29,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:29,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:29,578 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:29,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:54:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:29,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:54:29,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 403 proven. 64 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-11-16 11:54:30,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-11-16 11:54:30,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270674868] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:30,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:54:30,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2022-11-16 11:54:30,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290561030] [2022-11-16 11:54:30,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:30,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:30,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:30,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:54:30,641 INFO L87 Difference]: Start difference. First operand 58161 states and 66012 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 11:54:33,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:33,456 INFO L93 Difference]: Finished difference Result 118856 states and 134745 transitions. [2022-11-16 11:54:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:33,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 419 [2022-11-16 11:54:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:33,520 INFO L225 Difference]: With dead ends: 118856 [2022-11-16 11:54:33,520 INFO L226 Difference]: Without dead ends: 60690 [2022-11-16 11:54:33,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 835 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:54:33,551 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 423 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:33,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 713 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 11:54:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60690 states. [2022-11-16 11:54:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60690 to 60220. [2022-11-16 11:54:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60220 states, 60219 states have (on average 1.1171391089191118) internal successors, (67273), 60219 states have internal predecessors, (67273), 0 states have call successors, (0), 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 11:54:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60220 states to 60220 states and 67273 transitions. [2022-11-16 11:54:34,583 INFO L78 Accepts]: Start accepts. Automaton has 60220 states and 67273 transitions. Word has length 419 [2022-11-16 11:54:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:34,583 INFO L495 AbstractCegarLoop]: Abstraction has 60220 states and 67273 transitions. [2022-11-16 11:54:34,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 11:54:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 60220 states and 67273 transitions. [2022-11-16 11:54:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2022-11-16 11:54:34,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:34,615 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:34,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:34,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e9eb022-1d48-4d73-a20c-2f3a11ce532d/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:34,821 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:34,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:34,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1908444143, now seen corresponding path program 1 times [2022-11-16 11:54:34,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:34,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628802052] [2022-11-16 11:54:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:34,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-16 11:54:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628802052] [2022-11-16 11:54:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628802052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:35,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:35,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575548933] [2022-11-16 11:54:35,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:35,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:35,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:35,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:54:35,717 INFO L87 Difference]: Start difference. First operand 60220 states and 67273 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 11:54:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:38,741 INFO L93 Difference]: Finished difference Result 131517 states and 146693 transitions. [2022-11-16 11:54:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 632 [2022-11-16 11:54:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:38,812 INFO L225 Difference]: With dead ends: 131517 [2022-11-16 11:54:38,812 INFO L226 Difference]: Without dead ends: 70024 [2022-11-16 11:54:38,825 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 11:54:38,825 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 384 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:38,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 814 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 11:54:38,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70024 states. [2022-11-16 11:54:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70024 to 69159. [2022-11-16 11:54:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69159 states, 69158 states have (on average 1.1079990745828392) internal successors, (76627), 69158 states have internal predecessors, (76627), 0 states have call successors, (0), 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 11:54:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69159 states to 69159 states and 76627 transitions. [2022-11-16 11:54:39,844 INFO L78 Accepts]: Start accepts. Automaton has 69159 states and 76627 transitions. Word has length 632 [2022-11-16 11:54:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:39,845 INFO L495 AbstractCegarLoop]: Abstraction has 69159 states and 76627 transitions. [2022-11-16 11:54:39,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 11:54:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 69159 states and 76627 transitions. [2022-11-16 11:54:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2022-11-16 11:54:39,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:39,872 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, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:54:39,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:54:39,872 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:39,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1905884555, now seen corresponding path program 1 times [2022-11-16 11:54:39,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:39,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307107982] [2022-11-16 11:54:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:39,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 526 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-16 11:54:40,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:40,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307107982] [2022-11-16 11:54:40,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307107982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:40,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:40,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:40,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393107606] [2022-11-16 11:54:40,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:40,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:40,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:40,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:40,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:54:40,249 INFO L87 Difference]: Start difference. First operand 69159 states and 76627 transitions. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 11:54:43,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:43,384 INFO L93 Difference]: Finished difference Result 145547 states and 161535 transitions. [2022-11-16 11:54:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:43,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 643 [2022-11-16 11:54:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:43,469 INFO L225 Difference]: With dead ends: 145547 [2022-11-16 11:54:43,469 INFO L226 Difference]: Without dead ends: 76387 [2022-11-16 11:54:43,483 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 11:54:43,483 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 499 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:43,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 676 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 11:54:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76387 states. [2022-11-16 11:54:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76387 to 76382. [2022-11-16 11:54:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76382 states, 76381 states have (on average 1.1021589138660137) internal successors, (84184), 76381 states have internal predecessors, (84184), 0 states have call successors, (0), 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 11:54:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76382 states to 76382 states and 84184 transitions. [2022-11-16 11:54:44,737 INFO L78 Accepts]: Start accepts. Automaton has 76382 states and 84184 transitions. Word has length 643 [2022-11-16 11:54:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:44,738 INFO L495 AbstractCegarLoop]: Abstraction has 76382 states and 84184 transitions. [2022-11-16 11:54:44,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 11:54:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 76382 states and 84184 transitions. [2022-11-16 11:54:44,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2022-11-16 11:54:44,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:44,786 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, 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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:44,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:54:44,788 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:44,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1235888099, now seen corresponding path program 1 times [2022-11-16 11:54:44,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:44,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654099026] [2022-11-16 11:54:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:44,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2022-11-16 11:54:46,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:46,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654099026] [2022-11-16 11:54:46,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654099026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:46,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:46,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:54:46,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089289846] [2022-11-16 11:54:46,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:46,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:54:46,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:46,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:54:46,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:54:46,229 INFO L87 Difference]: Start difference. First operand 76382 states and 84184 transitions. Second operand has 5 states, 5 states have (on average 75.6) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 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 11:54:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:49,546 INFO L93 Difference]: Finished difference Result 152418 states and 167977 transitions. [2022-11-16 11:54:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:54:49,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 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 749 [2022-11-16 11:54:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:49,615 INFO L225 Difference]: With dead ends: 152418 [2022-11-16 11:54:49,615 INFO L226 Difference]: Without dead ends: 76365 [2022-11-16 11:54:49,641 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 11:54:49,642 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 851 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2214 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:49,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 157 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2214 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 11:54:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76365 states. [2022-11-16 11:54:50,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76365 to 74229. [2022-11-16 11:54:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74229 states, 74228 states have (on average 1.0969849652422266) internal successors, (81427), 74228 states have internal predecessors, (81427), 0 states have call successors, (0), 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 11:54:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74229 states to 74229 states and 81427 transitions. [2022-11-16 11:54:50,885 INFO L78 Accepts]: Start accepts. Automaton has 74229 states and 81427 transitions. Word has length 749 [2022-11-16 11:54:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:50,889 INFO L495 AbstractCegarLoop]: Abstraction has 74229 states and 81427 transitions. [2022-11-16 11:54:50,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.6) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 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 11:54:50,889 INFO L276 IsEmpty]: Start isEmpty. Operand 74229 states and 81427 transitions. [2022-11-16 11:54:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2022-11-16 11:54:50,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:50,932 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:50,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:54:50,933 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:50,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:50,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1951325608, now seen corresponding path program 1 times [2022-11-16 11:54:50,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:50,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026502415] [2022-11-16 11:54:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:50,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 700 proven. 0 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2022-11-16 11:54:51,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:51,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026502415] [2022-11-16 11:54:51,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026502415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:51,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:51,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:54:51,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898971172] [2022-11-16 11:54:51,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:51,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:51,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:54:51,503 INFO L87 Difference]: Start difference. First operand 74229 states and 81427 transitions. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 11:54:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:54,361 INFO L93 Difference]: Finished difference Result 155290 states and 170402 transitions. [2022-11-16 11:54:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:54,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 816 [2022-11-16 11:54:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:54,436 INFO L225 Difference]: With dead ends: 155290 [2022-11-16 11:54:54,436 INFO L226 Difference]: Without dead ends: 81488 [2022-11-16 11:54:54,466 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 11:54:54,467 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 483 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:54,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 242 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 11:54:54,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81488 states. [2022-11-16 11:54:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81488 to 81034. [2022-11-16 11:54:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81034 states, 81033 states have (on average 1.089802919798107) internal successors, (88310), 81033 states have internal predecessors, (88310), 0 states have call successors, (0), 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 11:54:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81034 states to 81034 states and 88310 transitions. [2022-11-16 11:54:56,117 INFO L78 Accepts]: Start accepts. Automaton has 81034 states and 88310 transitions. Word has length 816 [2022-11-16 11:54:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:56,118 INFO L495 AbstractCegarLoop]: Abstraction has 81034 states and 88310 transitions. [2022-11-16 11:54:56,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 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 11:54:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 81034 states and 88310 transitions. [2022-11-16 11:54:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 873 [2022-11-16 11:54:56,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:56,162 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:54:56,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:54:56,163 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:54:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2081068811, now seen corresponding path program 1 times [2022-11-16 11:54:56,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:56,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234689694] [2022-11-16 11:54:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:56,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 931 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-16 11:54:57,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:57,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234689694] [2022-11-16 11:54:57,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234689694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:57,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:57,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:54:57,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759255335] [2022-11-16 11:54:57,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:57,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:57,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:57,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:57,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:57,441 INFO L87 Difference]: Start difference. First operand 81034 states and 88310 transitions. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 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 11:55:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:01,415 INFO L93 Difference]: Finished difference Result 180791 states and 196707 transitions. [2022-11-16 11:55:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:55:01,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 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 872 [2022-11-16 11:55:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:01,517 INFO L225 Difference]: With dead ends: 180791 [2022-11-16 11:55:01,517 INFO L226 Difference]: Without dead ends: 100184 [2022-11-16 11:55:01,545 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 11:55:01,545 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 347 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 2439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:01,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 638 Invalid, 2439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 11:55:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100184 states. [2022-11-16 11:55:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100184 to 96347. [2022-11-16 11:55:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96347 states, 96346 states have (on average 1.0879123160276503) internal successors, (104816), 96346 states have internal predecessors, (104816), 0 states have call successors, (0), 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 11:55:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96347 states to 96347 states and 104816 transitions. [2022-11-16 11:55:03,006 INFO L78 Accepts]: Start accepts. Automaton has 96347 states and 104816 transitions. Word has length 872 [2022-11-16 11:55:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:03,007 INFO L495 AbstractCegarLoop]: Abstraction has 96347 states and 104816 transitions. [2022-11-16 11:55:03,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 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 11:55:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 96347 states and 104816 transitions. [2022-11-16 11:55:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2022-11-16 11:55:03,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:03,528 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, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:03,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:55:03,529 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash -986437759, now seen corresponding path program 1 times [2022-11-16 11:55:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:03,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468231256] [2022-11-16 11:55:03,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:03,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 721 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-16 11:55:04,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:04,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468231256] [2022-11-16 11:55:04,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468231256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:04,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:04,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:55:04,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242717249] [2022-11-16 11:55:04,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:04,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:04,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:04,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:04,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:04,703 INFO L87 Difference]: Start difference. First operand 96347 states and 104816 transitions. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 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 11:55:07,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:07,673 INFO L93 Difference]: Finished difference Result 203773 states and 221750 transitions. [2022-11-16 11:55:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:07,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 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 935 [2022-11-16 11:55:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:07,792 INFO L225 Difference]: With dead ends: 203773 [2022-11-16 11:55:07,793 INFO L226 Difference]: Without dead ends: 107853 [2022-11-16 11:55:07,814 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 11:55:07,815 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 195 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:07,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 261 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 11:55:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107853 states. [2022-11-16 11:55:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107853 to 103584. [2022-11-16 11:55:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103584 states, 103583 states have (on average 1.0836816852186169) internal successors, (112251), 103583 states have internal predecessors, (112251), 0 states have call successors, (0), 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 11:55:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103584 states to 103584 states and 112251 transitions. [2022-11-16 11:55:09,498 INFO L78 Accepts]: Start accepts. Automaton has 103584 states and 112251 transitions. Word has length 935 [2022-11-16 11:55:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:09,499 INFO L495 AbstractCegarLoop]: Abstraction has 103584 states and 112251 transitions. [2022-11-16 11:55:09,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 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 11:55:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 103584 states and 112251 transitions. [2022-11-16 11:55:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 960 [2022-11-16 11:55:09,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:09,585 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 11:55:09,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:55:09,586 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:09,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:09,587 INFO L85 PathProgramCache]: Analyzing trace with hash -378932464, now seen corresponding path program 1 times [2022-11-16 11:55:09,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:09,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429082070] [2022-11-16 11:55:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:09,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 941 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2022-11-16 11:55:10,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:10,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429082070] [2022-11-16 11:55:10,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429082070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:10,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:10,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:55:10,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654397725] [2022-11-16 11:55:10,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:10,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:10,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:10,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:10,941 INFO L87 Difference]: Start difference. First operand 103584 states and 112251 transitions. Second operand has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 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 11:55:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:13,983 INFO L93 Difference]: Finished difference Result 228434 states and 247789 transitions. [2022-11-16 11:55:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:13,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 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 959 [2022-11-16 11:55:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:14,103 INFO L225 Difference]: With dead ends: 228434 [2022-11-16 11:55:14,103 INFO L226 Difference]: Without dead ends: 125277 [2022-11-16 11:55:14,145 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 11:55:14,145 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 382 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:14,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 272 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 11:55:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125277 states. [2022-11-16 11:55:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125277 to 123571. [2022-11-16 11:55:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123571 states, 123570 states have (on average 1.0769847050254917) internal successors, (133083), 123570 states have internal predecessors, (133083), 0 states have call successors, (0), 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 11:55:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123571 states to 123571 states and 133083 transitions. [2022-11-16 11:55:16,110 INFO L78 Accepts]: Start accepts. Automaton has 123571 states and 133083 transitions. Word has length 959 [2022-11-16 11:55:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:16,110 INFO L495 AbstractCegarLoop]: Abstraction has 123571 states and 133083 transitions. [2022-11-16 11:55:16,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 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 11:55:16,111 INFO L276 IsEmpty]: Start isEmpty. Operand 123571 states and 133083 transitions. [2022-11-16 11:55:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 967 [2022-11-16 11:55:16,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:16,201 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:55:16,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 11:55:16,201 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:16,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1327513093, now seen corresponding path program 1 times [2022-11-16 11:55:16,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:16,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917078630] [2022-11-16 11:55:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:16,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1412 backedges. 1183 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-11-16 11:55:17,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:17,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917078630] [2022-11-16 11:55:17,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917078630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:17,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:17,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:55:17,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211680132] [2022-11-16 11:55:17,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:17,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:55:17,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:17,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:55:17,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:55:17,478 INFO L87 Difference]: Start difference. First operand 123571 states and 133083 transitions. Second operand has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 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 11:55:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:22,116 INFO L93 Difference]: Finished difference Result 277377 states and 298256 transitions. [2022-11-16 11:55:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:55:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 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 966 [2022-11-16 11:55:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:22,277 INFO L225 Difference]: With dead ends: 277377 [2022-11-16 11:55:22,277 INFO L226 Difference]: Without dead ends: 153808 [2022-11-16 11:55:22,323 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 11:55:22,324 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 362 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:22,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 235 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 11:55:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153808 states.