./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop3-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/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_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop3-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/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 64bit --witnessprinter.graph.data.programhash b423e91c07db807a991977c27b19846d440f82ba40008ec10137a0c72e998867 --- 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 11:00:16,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:00:16,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:00:16,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:00:16,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:00:16,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:00:16,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:00:16,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:00:16,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:00:16,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:00:16,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:00:16,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:00:16,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:00:16,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:00:16,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:00:16,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:00:16,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:00:16,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:00:16,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:00:16,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:00:16,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:00:16,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:00:16,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:00:16,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:00:16,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:00:16,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:00:16,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:00:16,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:00:16,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:00:16,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:00:16,943 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:00:16,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:00:16,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:00:16,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:00:16,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:00:16,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:00:16,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:00:16,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:00:16,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:00:16,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:00:16,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:00:16,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 11:00:17,007 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:00:17,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:00:17,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:00:17,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:00:17,010 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:00:17,010 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:00:17,011 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:00:17,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:00:17,011 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:00:17,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:00:17,012 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:00:17,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:00:17,013 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:00:17,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:00:17,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:00:17,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:00:17,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:00:17,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:00:17,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:00:17,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:00:17,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:00:17,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:00:17,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:00:17,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:00:17,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:00:17,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:00:17,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:00:17,017 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:00:17,018 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:00:17,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:00:17,018 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_e0faf036-1f59-4db1-8399-dcce0b369e56/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b423e91c07db807a991977c27b19846d440f82ba40008ec10137a0c72e998867 [2022-11-16 11:00:17,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:00:17,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:00:17,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:00:17,428 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:00:17,429 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:00:17,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop3-back-serstep.c [2022-11-16 11:00:17,527 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/data/0ad74ccc7/4a0cfc81b7d2424aa82e4b5a35c60e12/FLAG9eededa99 [2022-11-16 11:00:18,273 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:00:18,274 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop3-back-serstep.c [2022-11-16 11:00:18,291 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/data/0ad74ccc7/4a0cfc81b7d2424aa82e4b5a35c60e12/FLAG9eededa99 [2022-11-16 11:00:18,395 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/data/0ad74ccc7/4a0cfc81b7d2424aa82e4b5a35c60e12 [2022-11-16 11:00:18,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:00:18,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:00:18,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:00:18,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:00:18,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:00:18,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:00:18" (1/1) ... [2022-11-16 11:00:18,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38be3301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:18, skipping insertion in model container [2022-11-16 11:00:18,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:00:18" (1/1) ... [2022-11-16 11:00:18,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:00:18,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:00:18,767 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_e0faf036-1f59-4db1-8399-dcce0b369e56/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop3-back-serstep.c[1014,1027] [2022-11-16 11:00:19,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:00:19,172 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:00:19,184 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_e0faf036-1f59-4db1-8399-dcce0b369e56/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.resistance.2.prop3-back-serstep.c[1014,1027] [2022-11-16 11:00:19,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:00:19,432 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:00:19,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19 WrapperNode [2022-11-16 11:00:19,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:00:19,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:00:19,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:00:19,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:00:19,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:19,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:19,839 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3474 [2022-11-16 11:00:19,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:00:19,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:00:19,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:00:19,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:00:19,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:19,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:19,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:19,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:19,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:19,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:19,981 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:20,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:20,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:00:20,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:00:20,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:00:20,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:00:20,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (1/1) ... [2022-11-16 11:00:20,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:00:20,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:00:20,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:00:20,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:00:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:00:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:00:20,828 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:00:20,830 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:00:25,095 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:00:25,108 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:00:25,108 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 11:00:25,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:00:25 BoogieIcfgContainer [2022-11-16 11:00:25,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:00:25,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:00:25,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:00:25,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:00:25,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:00:18" (1/3) ... [2022-11-16 11:00:25,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8aae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:00:25, skipping insertion in model container [2022-11-16 11:00:25,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:00:19" (2/3) ... [2022-11-16 11:00:25,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8aae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:00:25, skipping insertion in model container [2022-11-16 11:00:25,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:00:25" (3/3) ... [2022-11-16 11:00:25,127 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.resistance.2.prop3-back-serstep.c [2022-11-16 11:00:25,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:00:25,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:00:25,215 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:00:25,221 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;@6f95ebd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:00:25,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:00:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 584 states, 582 states have (on average 1.6632302405498283) internal successors, (968), 583 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 11:00:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-16 11:00:25,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:00:25,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:00:25,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:00:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:00:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1950332215, now seen corresponding path program 1 times [2022-11-16 11:00:25,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:00:25,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348234163] [2022-11-16 11:00:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:00:25,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:00:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:00:26,376 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 11:00:26,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:00:26,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348234163] [2022-11-16 11:00:26,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348234163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:00:26,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:00:26,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:00:26,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059500338] [2022-11-16 11:00:26,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:00:26,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:00:26,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:00:26,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:00:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:00:26,435 INFO L87 Difference]: Start difference. First operand has 584 states, 582 states have (on average 1.6632302405498283) internal successors, (968), 583 states have internal predecessors, (968), 0 states have call successors, (0), 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 4 states, 4 states have (on average 33.25) internal successors, (133), 4 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 11:00:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:00:26,642 INFO L93 Difference]: Finished difference Result 1930 states and 3212 transitions. [2022-11-16 11:00:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:00:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 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 11:00:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:00:26,666 INFO L225 Difference]: With dead ends: 1930 [2022-11-16 11:00:26,666 INFO L226 Difference]: Without dead ends: 1348 [2022-11-16 11:00:26,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:00:26,675 INFO L413 NwaCegarLoop]: 1280 mSDtfsCounter, 2862 mSDsluCounter, 1593 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2862 SdHoareTripleChecker+Valid, 2873 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:00:26,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2862 Valid, 2873 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:00:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2022-11-16 11:00:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 582. [2022-11-16 11:00:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 1.6592082616179002) internal successors, (964), 581 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 11:00:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 964 transitions. [2022-11-16 11:00:26,820 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 964 transitions. Word has length 133 [2022-11-16 11:00:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:00:26,821 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 964 transitions. [2022-11-16 11:00:26,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 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 11:00:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 964 transitions. [2022-11-16 11:00:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-16 11:00:26,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:00:26,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:00:26,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:00:26,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:00:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:00:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash -329030805, now seen corresponding path program 1 times [2022-11-16 11:00:26,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:00:26,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011944866] [2022-11-16 11:00:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:00:26,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:00:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:00:27,512 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 11:00:27,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:00:27,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011944866] [2022-11-16 11:00:27,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011944866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:00:27,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:00:27,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:00:27,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783794884] [2022-11-16 11:00:27,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:00:27,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:00:27,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:00:27,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:00:27,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:00:27,520 INFO L87 Difference]: Start difference. First operand 582 states and 964 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 11:00:28,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:00:28,097 INFO L93 Difference]: Finished difference Result 2309 states and 3834 transitions. [2022-11-16 11:00:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:00:28,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2022-11-16 11:00:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:00:28,110 INFO L225 Difference]: With dead ends: 2309 [2022-11-16 11:00:28,110 INFO L226 Difference]: Without dead ends: 1729 [2022-11-16 11:00:28,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:00:28,114 INFO L413 NwaCegarLoop]: 1274 mSDtfsCounter, 2419 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2419 SdHoareTripleChecker+Valid, 3186 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:00:28,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2419 Valid, 3186 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:00:28,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2022-11-16 11:00:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 773. [2022-11-16 11:00:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.6593264248704662) internal successors, (1281), 772 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:00:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1281 transitions. [2022-11-16 11:00:28,156 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1281 transitions. Word has length 134 [2022-11-16 11:00:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:00:28,156 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1281 transitions. [2022-11-16 11:00:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 11:00:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1281 transitions. [2022-11-16 11:00:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2022-11-16 11:00:28,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:00:28,186 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:00:28,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:00:28,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:00:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:00:28,188 INFO L85 PathProgramCache]: Analyzing trace with hash -569034840, now seen corresponding path program 1 times [2022-11-16 11:00:28,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:00:28,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052332657] [2022-11-16 11:00:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:00:28,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:00:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:00:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:00:52,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:00:52,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052332657] [2022-11-16 11:00:52,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052332657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:00:52,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230836476] [2022-11-16 11:00:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:00:52,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:00:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:00:52,865 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:00:52,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:00:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:00:54,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 4282 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 11:00:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:01,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:01:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:09,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230836476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:01:09,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:01:09,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 20 [2022-11-16 11:01:09,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817210643] [2022-11-16 11:01:09,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:01:09,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:01:09,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:01:09,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:01:09,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:01:09,495 INFO L87 Difference]: Start difference. First operand 773 states and 1281 transitions. Second operand has 20 states, 20 states have (on average 77.45) internal successors, (1549), 20 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states 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 11:01:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:19,227 INFO L93 Difference]: Finished difference Result 4007 states and 6595 transitions. [2022-11-16 11:01:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:01:19,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 77.45) internal successors, (1549), 20 states have internal predecessors, (1549), 0 states have call successors, (0), 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 519 [2022-11-16 11:01:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:19,248 INFO L225 Difference]: With dead ends: 4007 [2022-11-16 11:01:19,248 INFO L226 Difference]: Without dead ends: 3427 [2022-11-16 11:01:19,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1024 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:01:19,257 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 18374 mSDsluCounter, 3956 mSDsCounter, 0 mSdLazyCounter, 9046 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18374 SdHoareTripleChecker+Valid, 4240 SdHoareTripleChecker+Invalid, 9238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 9046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:19,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18374 Valid, 4240 Invalid, 9238 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [192 Valid, 9046 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-11-16 11:01:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2022-11-16 11:01:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 1347. [2022-11-16 11:01:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:01:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:01:19,330 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 519 [2022-11-16 11:01:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:19,334 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:01:19,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 77.45) internal successors, (1549), 20 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states 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 11:01:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:01:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-11-16 11:01:19,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:19,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:01:19,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:19,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:01:19,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:01:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:19,564 INFO L85 PathProgramCache]: Analyzing trace with hash -2051316810, now seen corresponding path program 1 times [2022-11-16 11:01:19,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:01:19,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267355602] [2022-11-16 11:01:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:19,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:01:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-16 11:01:29,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:01:29,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267355602] [2022-11-16 11:01:29,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267355602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:29,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:29,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:01:29,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334330955] [2022-11-16 11:01:29,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:29,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:01:29,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:01:29,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:01:29,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:01:29,332 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states 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 11:01:29,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:29,542 INFO L93 Difference]: Finished difference Result 3647 states and 6052 transitions. [2022-11-16 11:01:29,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:01:29,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 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 520 [2022-11-16 11:01:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:29,554 INFO L225 Difference]: With dead ends: 3647 [2022-11-16 11:01:29,554 INFO L226 Difference]: Without dead ends: 3067 [2022-11-16 11:01:29,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:01:29,565 INFO L413 NwaCegarLoop]: 1274 mSDtfsCounter, 2852 mSDsluCounter, 2219 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2852 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:29,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2852 Valid, 3493 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:01:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2022-11-16 11:01:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 1347. [2022-11-16 11:01:29,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:01:29,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:01:29,671 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 520 [2022-11-16 11:01:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:29,672 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:01:29,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states 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 11:01:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:01:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-11-16 11:01:29,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:29,678 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:01:29,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:01:29,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:01:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash 623256632, now seen corresponding path program 1 times [2022-11-16 11:01:29,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:01:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591473919] [2022-11-16 11:01:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:01:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:48,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:01:48,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591473919] [2022-11-16 11:01:48,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591473919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:01:48,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203141983] [2022-11-16 11:01:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:48,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:01:48,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:01:48,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:01:48,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:01:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 4288 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:01:50,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:54,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:01:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:56,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203141983] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:01:56,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:01:56,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 18 [2022-11-16 11:01:56,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257220343] [2022-11-16 11:01:56,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:56,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:01:56,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:01:56,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:01:56,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:01:56,326 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 11:02:00,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:00,111 INFO L93 Difference]: Finished difference Result 4240 states and 7032 transitions. [2022-11-16 11:02:00,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:02:00,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 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 521 [2022-11-16 11:02:00,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:00,125 INFO L225 Difference]: With dead ends: 4240 [2022-11-16 11:02:00,125 INFO L226 Difference]: Without dead ends: 3658 [2022-11-16 11:02:00,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:02:00,128 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 7178 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 3680 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7178 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 3683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 3680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:00,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7178 Valid, 1426 Invalid, 3683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 3680 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-16 11:02:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2022-11-16 11:02:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 1353. [2022-11-16 11:02:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 1.6590236686390532) internal successors, (2243), 1352 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states 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 11:02:00,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2243 transitions. [2022-11-16 11:02:00,181 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2243 transitions. Word has length 521 [2022-11-16 11:02:00,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:00,182 INFO L495 AbstractCegarLoop]: Abstraction has 1353 states and 2243 transitions. [2022-11-16 11:02:00,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 11:02:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2243 transitions. [2022-11-16 11:02:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-11-16 11:02:00,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:00,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:02:00,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:00,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:02:00,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:02:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:00,408 INFO L85 PathProgramCache]: Analyzing trace with hash 623316214, now seen corresponding path program 1 times [2022-11-16 11:02:00,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:02:00,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324632107] [2022-11-16 11:02:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:00,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:02:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:16,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:02:16,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324632107] [2022-11-16 11:02:16,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324632107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:02:16,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222404895] [2022-11-16 11:02:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:16,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:02:16,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:02:16,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:02:16,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:02:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:18,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 4288 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 11:02:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:22,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:22,821 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-16 11:02:22,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222404895] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:02:22,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:02:22,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 9] total 15 [2022-11-16 11:02:22,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794848375] [2022-11-16 11:02:22,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:22,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:02:22,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:02:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:02:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:02:22,824 INFO L87 Difference]: Start difference. First operand 1353 states and 2243 transitions. Second operand has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 11:02:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:23,044 INFO L93 Difference]: Finished difference Result 3671 states and 6087 transitions. [2022-11-16 11:02:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:02:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 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 521 [2022-11-16 11:02:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:23,055 INFO L225 Difference]: With dead ends: 3671 [2022-11-16 11:02:23,055 INFO L226 Difference]: Without dead ends: 3083 [2022-11-16 11:02:23,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 1037 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:02:23,057 INFO L413 NwaCegarLoop]: 1272 mSDtfsCounter, 3810 mSDsluCounter, 3490 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3810 SdHoareTripleChecker+Valid, 4762 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:23,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3810 Valid, 4762 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:02:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3083 states. [2022-11-16 11:02:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3083 to 1347. [2022-11-16 11:02:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:02:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:02:23,103 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 521 [2022-11-16 11:02:23,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:23,104 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:02:23,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 11:02:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:02:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-11-16 11:02:23,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:23,109 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:02:23,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:23,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:02:23,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:02:23,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:23,323 INFO L85 PathProgramCache]: Analyzing trace with hash -947000358, now seen corresponding path program 1 times [2022-11-16 11:02:23,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:02:23,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974701850] [2022-11-16 11:02:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:23,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:02:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:48,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:02:48,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974701850] [2022-11-16 11:02:48,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974701850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:02:48,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020209050] [2022-11-16 11:02:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:48,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:02:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:02:48,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:02:48,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:02:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:49,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 4291 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 11:02:49,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:54,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:56,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020209050] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:02:56,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:02:56,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 10] total 20 [2022-11-16 11:02:56,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295914882] [2022-11-16 11:02:56,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:56,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:02:56,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:02:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:02:56,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:02:56,099 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 11:03:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:00,737 INFO L93 Difference]: Finished difference Result 4272 states and 7084 transitions. [2022-11-16 11:03:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:03:00,738 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 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 522 [2022-11-16 11:03:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:00,750 INFO L225 Difference]: With dead ends: 4272 [2022-11-16 11:03:00,750 INFO L226 Difference]: Without dead ends: 3687 [2022-11-16 11:03:00,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1066 GetRequests, 1039 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:03:00,753 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 9094 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 4608 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9094 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 4611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:00,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9094 Valid, 1774 Invalid, 4611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4608 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 11:03:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3687 states. [2022-11-16 11:03:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3687 to 1356. [2022-11-16 11:03:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 1.659040590405904) internal successors, (2248), 1355 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states 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 11:03:00,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2248 transitions. [2022-11-16 11:03:00,805 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2248 transitions. Word has length 522 [2022-11-16 11:03:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:00,806 INFO L495 AbstractCegarLoop]: Abstraction has 1356 states and 2248 transitions. [2022-11-16 11:03:00,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.57142857142857) internal successors, (522), 7 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 11:03:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2248 transitions. [2022-11-16 11:03:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-11-16 11:03:00,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:00,812 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:03:00,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:01,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:01,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:03:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:01,036 INFO L85 PathProgramCache]: Analyzing trace with hash -946940776, now seen corresponding path program 1 times [2022-11-16 11:03:01,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:01,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915998313] [2022-11-16 11:03:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:01,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:15,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:15,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915998313] [2022-11-16 11:03:15,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915998313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:03:15,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975136816] [2022-11-16 11:03:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:15,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:15,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:15,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:03:15,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:03:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:17,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 4291 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 11:03:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:21,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:03:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-16 11:03:22,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975136816] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:03:22,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:03:22,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 10] total 17 [2022-11-16 11:03:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358837261] [2022-11-16 11:03:22,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:22,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:03:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:22,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:03:22,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:03:22,901 INFO L87 Difference]: Start difference. First operand 1356 states and 2248 transitions. Second operand has 6 states, 6 states have (on average 66.83333333333333) internal successors, (401), 6 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 11:03:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:23,201 INFO L93 Difference]: Finished difference Result 3701 states and 6137 transitions. [2022-11-16 11:03:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:03:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 66.83333333333333) internal successors, (401), 6 states have internal predecessors, (401), 0 states have call successors, (0), 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 522 [2022-11-16 11:03:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:23,211 INFO L225 Difference]: With dead ends: 3701 [2022-11-16 11:03:23,211 INFO L226 Difference]: Without dead ends: 3107 [2022-11-16 11:03:23,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1040 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:03:23,213 INFO L413 NwaCegarLoop]: 1270 mSDtfsCounter, 4777 mSDsluCounter, 4759 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4777 SdHoareTripleChecker+Valid, 6029 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:23,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4777 Valid, 6029 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:03:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2022-11-16 11:03:23,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 1347. [2022-11-16 11:03:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:03:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:03:23,248 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 522 [2022-11-16 11:03:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:23,250 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:03:23,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.83333333333333) internal successors, (401), 6 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 11:03:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:03:23,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-11-16 11:03:23,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:23,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:03:23,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:23,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:23,471 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:03:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1125479312, now seen corresponding path program 1 times [2022-11-16 11:03:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:23,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86049780] [2022-11-16 11:03:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:23,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:03:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:38,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:03:38,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86049780] [2022-11-16 11:03:38,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86049780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:03:38,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912967491] [2022-11-16 11:03:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:38,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:03:38,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:03:38,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:03:38,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:03:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:03:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 4294 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 11:03:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:03:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:45,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:03:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:03:46,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912967491] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:03:46,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:03:46,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 11] total 22 [2022-11-16 11:03:46,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969153256] [2022-11-16 11:03:46,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:03:46,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:03:46,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:03:46,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:03:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:03:46,763 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 11:03:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:03:51,860 INFO L93 Difference]: Finished difference Result 4308 states and 7144 transitions. [2022-11-16 11:03:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:03:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 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 523 [2022-11-16 11:03:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:03:51,872 INFO L225 Difference]: With dead ends: 4308 [2022-11-16 11:03:51,872 INFO L226 Difference]: Without dead ends: 3720 [2022-11-16 11:03:51,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1043 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:03:51,875 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 11018 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 5538 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11018 SdHoareTripleChecker+Valid, 2121 SdHoareTripleChecker+Invalid, 5541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:03:51,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11018 Valid, 2121 Invalid, 5541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5538 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-16 11:03:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2022-11-16 11:03:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 1359. [2022-11-16 11:03:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 1.659057437407953) internal successors, (2253), 1358 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states 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 11:03:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2253 transitions. [2022-11-16 11:03:51,926 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2253 transitions. Word has length 523 [2022-11-16 11:03:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:03:51,927 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 2253 transitions. [2022-11-16 11:03:51,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 65.375) internal successors, (523), 8 states have internal predecessors, (523), 0 states have call successors, (0), 0 states 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 11:03:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2253 transitions. [2022-11-16 11:03:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-11-16 11:03:51,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:03:51,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:03:51,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:03:52,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:03:52,154 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:03:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:03:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1125538894, now seen corresponding path program 1 times [2022-11-16 11:03:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:03:52,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164314556] [2022-11-16 11:03:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:03:52,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:17,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:17,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164314556] [2022-11-16 11:04:17,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164314556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:17,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618087230] [2022-11-16 11:04:17,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:17,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:17,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:17,303 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:17,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:04:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:19,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 4294 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 11:04:19,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:23,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-16 11:04:24,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618087230] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:24,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:04:24,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 11] total 19 [2022-11-16 11:04:24,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460484166] [2022-11-16 11:04:24,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:24,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:04:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:24,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:04:24,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:04:24,789 INFO L87 Difference]: Start difference. First operand 1359 states and 2253 transitions. Second operand has 7 states, 7 states have (on average 57.714285714285715) internal successors, (404), 7 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 11:04:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:04:25,227 INFO L93 Difference]: Finished difference Result 3731 states and 6187 transitions. [2022-11-16 11:04:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:04:25,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 57.714285714285715) internal successors, (404), 7 states have internal predecessors, (404), 0 states have call successors, (0), 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 523 [2022-11-16 11:04:25,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:04:25,234 INFO L225 Difference]: With dead ends: 3731 [2022-11-16 11:04:25,235 INFO L226 Difference]: Without dead ends: 3131 [2022-11-16 11:04:25,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1070 GetRequests, 1043 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-11-16 11:04:25,237 INFO L413 NwaCegarLoop]: 1268 mSDtfsCounter, 5749 mSDsluCounter, 6026 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5749 SdHoareTripleChecker+Valid, 7294 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:04:25,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5749 Valid, 7294 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:04:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2022-11-16 11:04:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 1347. [2022-11-16 11:04:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:04:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:04:25,271 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 523 [2022-11-16 11:04:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:04:25,272 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:04:25,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.714285714285715) internal successors, (404), 7 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 11:04:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:04:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-11-16 11:04:25,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:04:25,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:04:25,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:25,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:04:25,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:04:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:25,500 INFO L85 PathProgramCache]: Analyzing trace with hash 686629824, now seen corresponding path program 1 times [2022-11-16 11:04:25,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:25,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407170759] [2022-11-16 11:04:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:25,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:51,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:51,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407170759] [2022-11-16 11:04:51,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407170759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:51,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506770215] [2022-11-16 11:04:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:51,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:51,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:51,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:51,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:04:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:53,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 4297 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 11:04:53,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:58,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:59,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506770215] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:59,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:04:59,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 12] total 24 [2022-11-16 11:04:59,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116690392] [2022-11-16 11:04:59,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:59,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:04:59,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:59,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:04:59,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:04:59,963 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 11:05:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:05,876 INFO L93 Difference]: Finished difference Result 4344 states and 7204 transitions. [2022-11-16 11:05:05,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:05:05,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 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 524 [2022-11-16 11:05:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:05,884 INFO L225 Difference]: With dead ends: 4344 [2022-11-16 11:05:05,885 INFO L226 Difference]: Without dead ends: 3753 [2022-11-16 11:05:05,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1086 GetRequests, 1047 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=1390, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:05:05,888 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 14237 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 6470 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14237 SdHoareTripleChecker+Valid, 2465 SdHoareTripleChecker+Invalid, 6473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:05,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14237 Valid, 2465 Invalid, 6473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6470 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-11-16 11:05:05,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-11-16 11:05:05,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 1362. [2022-11-16 11:05:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 1.6590742101396032) internal successors, (2258), 1361 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states 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 11:05:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 2258 transitions. [2022-11-16 11:05:05,931 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 2258 transitions. Word has length 524 [2022-11-16 11:05:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:05,932 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 2258 transitions. [2022-11-16 11:05:05,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 11:05:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 2258 transitions. [2022-11-16 11:05:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2022-11-16 11:05:05,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:05,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:05:05,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 11:05:06,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:06,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:06,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:06,154 INFO L85 PathProgramCache]: Analyzing trace with hash 686689406, now seen corresponding path program 1 times [2022-11-16 11:05:06,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:06,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000235312] [2022-11-16 11:05:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:06,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:19,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000235312] [2022-11-16 11:05:19,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000235312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882335872] [2022-11-16 11:05:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:19,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:19,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:19,995 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:19,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:05:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 4297 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 11:05:22,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:26,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-16 11:05:27,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882335872] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:27,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:05:27,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 12] total 21 [2022-11-16 11:05:27,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843664887] [2022-11-16 11:05:27,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:27,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:05:27,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:27,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:05:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:05:27,109 INFO L87 Difference]: Start difference. First operand 1362 states and 2258 transitions. Second operand has 8 states, 8 states have (on average 50.875) internal successors, (407), 8 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 11:05:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:05:27,659 INFO L93 Difference]: Finished difference Result 3761 states and 6237 transitions. [2022-11-16 11:05:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:05:27,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 50.875) internal successors, (407), 8 states have internal predecessors, (407), 0 states have call successors, (0), 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 524 [2022-11-16 11:05:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:05:27,665 INFO L225 Difference]: With dead ends: 3761 [2022-11-16 11:05:27,666 INFO L226 Difference]: Without dead ends: 3155 [2022-11-16 11:05:27,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1078 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:05:27,669 INFO L413 NwaCegarLoop]: 1266 mSDtfsCounter, 6726 mSDsluCounter, 7291 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6726 SdHoareTripleChecker+Valid, 8557 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:05:27,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6726 Valid, 8557 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:05:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2022-11-16 11:05:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 1347. [2022-11-16 11:05:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:05:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:05:27,712 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 524 [2022-11-16 11:05:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:05:27,712 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:05:27,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 50.875) internal successors, (407), 8 states have internal predecessors, (407), 0 states have call successors, (0), 0 states 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 11:05:27,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:05:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-11-16 11:05:27,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:05:27,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:05:27,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:27,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:05:27,943 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:05:27,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash 746249898, now seen corresponding path program 1 times [2022-11-16 11:05:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:27,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840988355] [2022-11-16 11:05:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:27,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:56,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:56,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840988355] [2022-11-16 11:05:56,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840988355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:56,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130867077] [2022-11-16 11:05:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:56,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:56,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:56,336 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:56,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:05:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 4300 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 11:05:58,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:03,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:05,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130867077] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:05,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:06:05,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 13] total 26 [2022-11-16 11:06:05,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248024344] [2022-11-16 11:06:05,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:05,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:06:05,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:05,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:06:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:06:05,005 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 10 states, 10 states have (on average 52.5) internal successors, (525), 10 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 11:06:12,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:12,116 INFO L93 Difference]: Finished difference Result 4380 states and 7264 transitions. [2022-11-16 11:06:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:06:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 52.5) internal successors, (525), 10 states have internal predecessors, (525), 0 states have call successors, (0), 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 525 [2022-11-16 11:06:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:12,124 INFO L225 Difference]: With dead ends: 4380 [2022-11-16 11:06:12,124 INFO L226 Difference]: Without dead ends: 3786 [2022-11-16 11:06:12,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1051 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=324, Invalid=1838, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:06:12,128 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 16173 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 7404 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16173 SdHoareTripleChecker+Valid, 2808 SdHoareTripleChecker+Invalid, 7407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:12,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16173 Valid, 2808 Invalid, 7407 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 7404 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-16 11:06:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2022-11-16 11:06:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 1365. [2022-11-16 11:06:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.6590909090909092) internal successors, (2263), 1364 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states 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 11:06:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2263 transitions. [2022-11-16 11:06:12,173 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2263 transitions. Word has length 525 [2022-11-16 11:06:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:12,173 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2263 transitions. [2022-11-16 11:06:12,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.5) internal successors, (525), 10 states have internal predecessors, (525), 0 states have call successors, (0), 0 states 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 11:06:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2263 transitions. [2022-11-16 11:06:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2022-11-16 11:06:12,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:12,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-16 11:06:12,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:12,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:06:12,402 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 746309480, now seen corresponding path program 1 times [2022-11-16 11:06:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:12,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32277934] [2022-11-16 11:06:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:28,484 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:28,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:28,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32277934] [2022-11-16 11:06:28,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32277934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:28,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476822591] [2022-11-16 11:06:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:28,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:28,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:28,486 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:28,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:06:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:30,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 4300 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 11:06:30,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:35,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-16 11:06:36,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476822591] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:36,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:06:36,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 13] total 22 [2022-11-16 11:06:36,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274083501] [2022-11-16 11:06:36,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:06:36,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:06:36,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:06:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:06:36,745 INFO L87 Difference]: Start difference. First operand 1365 states and 2263 transitions. Second operand has 9 states, 9 states have (on average 45.55555555555556) internal successors, (410), 9 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 11:06:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:06:37,491 INFO L93 Difference]: Finished difference Result 3791 states and 6287 transitions. [2022-11-16 11:06:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:06:37,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 45.55555555555556) internal successors, (410), 9 states have internal predecessors, (410), 0 states have call successors, (0), 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 525 [2022-11-16 11:06:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:06:37,498 INFO L225 Difference]: With dead ends: 3791 [2022-11-16 11:06:37,498 INFO L226 Difference]: Without dead ends: 3179 [2022-11-16 11:06:37,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1086 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:06:37,503 INFO L413 NwaCegarLoop]: 1264 mSDtfsCounter, 7708 mSDsluCounter, 8554 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7708 SdHoareTripleChecker+Valid, 9818 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:06:37,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7708 Valid, 9818 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:06:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2022-11-16 11:06:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 1347. [2022-11-16 11:06:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:06:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:06:37,550 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 525 [2022-11-16 11:06:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:06:37,551 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:06:37,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 45.55555555555556) internal successors, (410), 9 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 11:06:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:06:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-11-16 11:06:37,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:06:37,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:06:37,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:37,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:37,784 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:06:37,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:37,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1557545700, now seen corresponding path program 1 times [2022-11-16 11:06:37,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:37,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383207327] [2022-11-16 11:06:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:37,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:06,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:06,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383207327] [2022-11-16 11:07:06,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383207327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:06,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874855698] [2022-11-16 11:07:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:06,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:06,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:06,956 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:06,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:07:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 4303 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 11:07:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:13,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:14,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874855698] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:14,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:07:14,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 14] total 28 [2022-11-16 11:07:14,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780798830] [2022-11-16 11:07:14,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:14,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:07:14,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:14,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:07:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:07:14,858 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 11 states, 11 states have (on average 47.81818181818182) internal successors, (526), 11 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 11:07:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:22,272 INFO L93 Difference]: Finished difference Result 4416 states and 7324 transitions. [2022-11-16 11:07:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:07:22,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 47.81818181818182) internal successors, (526), 11 states have internal predecessors, (526), 0 states have call successors, (0), 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 526 [2022-11-16 11:07:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:22,281 INFO L225 Difference]: With dead ends: 4416 [2022-11-16 11:07:22,281 INFO L226 Difference]: Without dead ends: 3819 [2022-11-16 11:07:22,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1055 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=408, Invalid=2348, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:07:22,284 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 16816 mSDsluCounter, 2805 mSDsCounter, 0 mSdLazyCounter, 8340 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16816 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 8343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:22,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16816 Valid, 3152 Invalid, 8343 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 8340 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-16 11:07:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3819 states. [2022-11-16 11:07:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3819 to 1368. [2022-11-16 11:07:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 1.6591075347476225) internal successors, (2268), 1367 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states 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 11:07:22,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2268 transitions. [2022-11-16 11:07:22,320 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2268 transitions. Word has length 526 [2022-11-16 11:07:22,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:22,321 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2268 transitions. [2022-11-16 11:07:22,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 47.81818181818182) internal successors, (526), 11 states have internal predecessors, (526), 0 states have call successors, (0), 0 states 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 11:07:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2268 transitions. [2022-11-16 11:07:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 527 [2022-11-16 11:07:22,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:22,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:22,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:22,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:07:22,536 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:22,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1557605282, now seen corresponding path program 1 times [2022-11-16 11:07:22,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:22,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497242213] [2022-11-16 11:07:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:22,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:38,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:38,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497242213] [2022-11-16 11:07:38,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497242213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:38,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041882924] [2022-11-16 11:07:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:38,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:38,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:38,015 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:38,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:07:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 4303 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 11:07:40,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:44,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-16 11:07:45,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041882924] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:45,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:07:45,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 14] total 24 [2022-11-16 11:07:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908928737] [2022-11-16 11:07:45,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:07:45,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:07:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:07:45,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:07:45,680 INFO L87 Difference]: Start difference. First operand 1368 states and 2268 transitions. Second operand has 10 states, 10 states have (on average 41.3) internal successors, (413), 10 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 11:07:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:07:46,476 INFO L93 Difference]: Finished difference Result 3821 states and 6337 transitions. [2022-11-16 11:07:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:07:46,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 41.3) internal successors, (413), 10 states have internal predecessors, (413), 0 states have call successors, (0), 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 526 [2022-11-16 11:07:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:07:46,481 INFO L225 Difference]: With dead ends: 3821 [2022-11-16 11:07:46,481 INFO L226 Difference]: Without dead ends: 3203 [2022-11-16 11:07:46,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 1053 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:07:46,484 INFO L413 NwaCegarLoop]: 1262 mSDtfsCounter, 8695 mSDsluCounter, 9815 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8695 SdHoareTripleChecker+Valid, 11077 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:07:46,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8695 Valid, 11077 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:07:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2022-11-16 11:07:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 1347. [2022-11-16 11:07:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:07:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:07:46,518 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 526 [2022-11-16 11:07:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:07:46,518 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:07:46,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 41.3) internal successors, (413), 10 states have internal predecessors, (413), 0 states have call successors, (0), 0 states 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 11:07:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:07:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-16 11:07:46,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:07:46,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:07:46,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:46,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:07:46,739 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:07:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:46,740 INFO L85 PathProgramCache]: Analyzing trace with hash 930471170, now seen corresponding path program 1 times [2022-11-16 11:07:46,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:46,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349420702] [2022-11-16 11:07:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:46,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:04,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:04,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349420702] [2022-11-16 11:08:04,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349420702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:04,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582795415] [2022-11-16 11:08:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:04,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:04,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:04,429 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:04,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:08:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:06,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 4306 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-16 11:08:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:11,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:13,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582795415] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:13,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:08:13,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 15] total 30 [2022-11-16 11:08:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160638053] [2022-11-16 11:08:13,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:13,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:08:13,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:13,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:08:13,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:08:13,366 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 12 states, 12 states have (on average 43.916666666666664) internal successors, (527), 12 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 11:08:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:21,502 INFO L93 Difference]: Finished difference Result 4452 states and 7384 transitions. [2022-11-16 11:08:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 11:08:21,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 43.916666666666664) internal successors, (527), 12 states have internal predecessors, (527), 0 states have call successors, (0), 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 527 [2022-11-16 11:08:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:21,507 INFO L225 Difference]: With dead ends: 4452 [2022-11-16 11:08:21,507 INFO L226 Difference]: Without dead ends: 3852 [2022-11-16 11:08:21,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1116 GetRequests, 1059 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=502, Invalid=2920, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 11:08:21,511 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 18752 mSDsluCounter, 3148 mSDsCounter, 0 mSdLazyCounter, 9278 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18752 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 9281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:21,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18752 Valid, 3493 Invalid, 9281 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 9278 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-16 11:08:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3852 states. [2022-11-16 11:08:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3852 to 1371. [2022-11-16 11:08:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.659124087591241) internal successors, (2273), 1370 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states 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 11:08:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2273 transitions. [2022-11-16 11:08:21,548 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2273 transitions. Word has length 527 [2022-11-16 11:08:21,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:21,549 INFO L495 AbstractCegarLoop]: Abstraction has 1371 states and 2273 transitions. [2022-11-16 11:08:21,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 43.916666666666664) internal successors, (527), 12 states have internal predecessors, (527), 0 states have call successors, (0), 0 states 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 11:08:21,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2273 transitions. [2022-11-16 11:08:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-11-16 11:08:21,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:21,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:21,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:21,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:08:21,767 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash 930530752, now seen corresponding path program 1 times [2022-11-16 11:08:21,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:21,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119166869] [2022-11-16 11:08:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:21,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:44,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:44,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119166869] [2022-11-16 11:08:44,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119166869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:44,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250347408] [2022-11-16 11:08:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:44,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:44,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:44,607 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:44,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:08:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 4306 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 11:08:47,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:51,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:52,363 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-16 11:08:52,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250347408] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:52,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:08:52,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7, 15] total 27 [2022-11-16 11:08:52,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043250591] [2022-11-16 11:08:52,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:08:52,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:08:52,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:08:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:08:52,365 INFO L87 Difference]: Start difference. First operand 1371 states and 2273 transitions. Second operand has 11 states, 11 states have (on average 37.81818181818182) internal successors, (416), 11 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 11:08:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:08:53,320 INFO L93 Difference]: Finished difference Result 3851 states and 6387 transitions. [2022-11-16 11:08:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:08:53,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 37.81818181818182) internal successors, (416), 11 states have internal predecessors, (416), 0 states have call successors, (0), 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 527 [2022-11-16 11:08:53,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:08:53,324 INFO L225 Difference]: With dead ends: 3851 [2022-11-16 11:08:53,324 INFO L226 Difference]: Without dead ends: 3227 [2022-11-16 11:08:53,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1102 GetRequests, 1055 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=2023, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:08:53,326 INFO L413 NwaCegarLoop]: 1260 mSDtfsCounter, 9687 mSDsluCounter, 11074 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9687 SdHoareTripleChecker+Valid, 12334 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:08:53,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9687 Valid, 12334 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:08:53,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2022-11-16 11:08:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 1347. [2022-11-16 11:08:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:08:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:08:53,357 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 527 [2022-11-16 11:08:53,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:08:53,358 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:08:53,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 37.81818181818182) internal successors, (416), 11 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 11:08:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:08:53,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-11-16 11:08:53,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:08:53,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:08:53,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:53,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:08:53,588 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:08:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash 407977674, now seen corresponding path program 1 times [2022-11-16 11:08:53,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:53,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481779635] [2022-11-16 11:08:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:53,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:09,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:09,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481779635] [2022-11-16 11:09:09,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481779635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:09,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910851478] [2022-11-16 11:09:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:09,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:09,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:09,997 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:09,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:09:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:12,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 4309 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 11:09:12,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:16,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:19,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910851478] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:19,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:09:19,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 16] total 32 [2022-11-16 11:09:19,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942355885] [2022-11-16 11:09:19,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:19,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:09:19,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:19,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:09:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:09:19,068 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 13 states, 13 states have (on average 40.61538461538461) internal successors, (528), 13 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 11:09:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:27,961 INFO L93 Difference]: Finished difference Result 4488 states and 7444 transitions. [2022-11-16 11:09:27,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:09:27,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 40.61538461538461) internal successors, (528), 13 states have internal predecessors, (528), 0 states have call successors, (0), 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 528 [2022-11-16 11:09:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:27,965 INFO L225 Difference]: With dead ends: 4488 [2022-11-16 11:09:27,965 INFO L226 Difference]: Without dead ends: 3885 [2022-11-16 11:09:27,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1126 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=606, Invalid=3554, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 11:09:27,968 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 20695 mSDsluCounter, 3489 mSDsCounter, 0 mSdLazyCounter, 10218 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20695 SdHoareTripleChecker+Valid, 3832 SdHoareTripleChecker+Invalid, 10221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:27,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20695 Valid, 3832 Invalid, 10221 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 10218 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-16 11:09:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2022-11-16 11:09:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 1374. [2022-11-16 11:09:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 1.6591405680990532) internal successors, (2278), 1373 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states 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 11:09:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2278 transitions. [2022-11-16 11:09:28,008 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2278 transitions. Word has length 528 [2022-11-16 11:09:28,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:28,009 INFO L495 AbstractCegarLoop]: Abstraction has 1374 states and 2278 transitions. [2022-11-16 11:09:28,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 40.61538461538461) internal successors, (528), 13 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 11:09:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2278 transitions. [2022-11-16 11:09:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-11-16 11:09:28,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:28,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:09:28,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:28,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:28,239 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash 408037256, now seen corresponding path program 1 times [2022-11-16 11:09:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:28,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107564591] [2022-11-16 11:09:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:28,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:48,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:48,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107564591] [2022-11-16 11:09:48,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107564591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:48,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85824597] [2022-11-16 11:09:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:48,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:48,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:48,473 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:48,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:09:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:50,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 4309 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-16 11:09:50,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:54,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-11-16 11:09:56,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85824597] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:56,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:09:56,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 16] total 28 [2022-11-16 11:09:56,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231797880] [2022-11-16 11:09:56,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:09:56,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:09:56,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:56,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:09:56,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:09:56,162 INFO L87 Difference]: Start difference. First operand 1374 states and 2278 transitions. Second operand has 12 states, 12 states have (on average 34.916666666666664) internal successors, (419), 12 states have internal predecessors, (419), 0 states have call successors, (0), 0 states 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 11:09:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:09:57,355 INFO L93 Difference]: Finished difference Result 3881 states and 6437 transitions. [2022-11-16 11:09:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 11:09:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 34.916666666666664) internal successors, (419), 12 states have internal predecessors, (419), 0 states have call successors, (0), 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 528 [2022-11-16 11:09:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:09:57,363 INFO L225 Difference]: With dead ends: 3881 [2022-11-16 11:09:57,364 INFO L226 Difference]: Without dead ends: 3251 [2022-11-16 11:09:57,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1059 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=2360, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 11:09:57,367 INFO L413 NwaCegarLoop]: 1258 mSDtfsCounter, 10684 mSDsluCounter, 12331 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10684 SdHoareTripleChecker+Valid, 13589 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:09:57,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10684 Valid, 13589 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:09:57,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2022-11-16 11:09:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 1347. [2022-11-16 11:09:57,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:09:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:09:57,401 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 528 [2022-11-16 11:09:57,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:09:57,402 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:09:57,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.916666666666664) internal successors, (419), 12 states have internal predecessors, (419), 0 states have call successors, (0), 0 states 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 11:09:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:09:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2022-11-16 11:09:57,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:09:57,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:09:57,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:57,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:57,623 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:09:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1034986524, now seen corresponding path program 1 times [2022-11-16 11:09:57,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:57,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210785094] [2022-11-16 11:09:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:57,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:10:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:24,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:10:24,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210785094] [2022-11-16 11:10:24,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210785094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:24,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134883344] [2022-11-16 11:10:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:24,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:10:24,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:10:24,079 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:10:24,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:10:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:10:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 11:10:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:10:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:31,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:10:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:10:33,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134883344] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:10:33,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:10:33,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 17] total 34 [2022-11-16 11:10:33,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194503610] [2022-11-16 11:10:33,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:10:33,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:10:33,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:10:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:10:33,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:10:33,439 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 14 states, 14 states have (on average 37.785714285714285) internal successors, (529), 14 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 11:10:43,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:10:43,951 INFO L93 Difference]: Finished difference Result 4524 states and 7504 transitions. [2022-11-16 11:10:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-16 11:10:43,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 37.785714285714285) internal successors, (529), 14 states have internal predecessors, (529), 0 states have call successors, (0), 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 529 [2022-11-16 11:10:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:10:43,956 INFO L225 Difference]: With dead ends: 4524 [2022-11-16 11:10:43,956 INFO L226 Difference]: Without dead ends: 3918 [2022-11-16 11:10:43,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1067 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=720, Invalid=4250, Unknown=0, NotChecked=0, Total=4970 [2022-11-16 11:10:43,959 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 22646 mSDsluCounter, 3827 mSDsCounter, 0 mSdLazyCounter, 11160 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22646 SdHoareTripleChecker+Valid, 4168 SdHoareTripleChecker+Invalid, 11163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:10:43,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22646 Valid, 4168 Invalid, 11163 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 11160 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-16 11:10:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2022-11-16 11:10:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 1377. [2022-11-16 11:10:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 1.659156976744186) internal successors, (2283), 1376 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states 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 11:10:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 2283 transitions. [2022-11-16 11:10:43,997 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 2283 transitions. Word has length 529 [2022-11-16 11:10:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:10:43,998 INFO L495 AbstractCegarLoop]: Abstraction has 1377 states and 2283 transitions. [2022-11-16 11:10:43,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.785714285714285) internal successors, (529), 14 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 11:10:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 2283 transitions. [2022-11-16 11:10:44,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2022-11-16 11:10:44,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:10:44,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:10:44,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:10:44,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:10:44,219 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:10:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:10:44,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1035046106, now seen corresponding path program 1 times [2022-11-16 11:10:44,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:10:44,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408141216] [2022-11-16 11:10:44,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:10:44,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:12,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:12,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408141216] [2022-11-16 11:11:12,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408141216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:12,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392397367] [2022-11-16 11:11:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:12,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:12,437 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:12,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:11:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:15,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 4312 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 11:11:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:19,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-11-16 11:11:21,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392397367] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:21,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:11:21,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [7, 17] total 30 [2022-11-16 11:11:21,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994792872] [2022-11-16 11:11:21,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:21,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:11:21,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:21,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:11:21,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:11:21,276 INFO L87 Difference]: Start difference. First operand 1377 states and 2283 transitions. Second operand has 13 states, 13 states have (on average 32.46153846153846) internal successors, (422), 13 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 11:11:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:22,836 INFO L93 Difference]: Finished difference Result 3911 states and 6487 transitions. [2022-11-16 11:11:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:11:22,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 32.46153846153846) internal successors, (422), 13 states have internal predecessors, (422), 0 states have call successors, (0), 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 529 [2022-11-16 11:11:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:22,841 INFO L225 Difference]: With dead ends: 3911 [2022-11-16 11:11:22,841 INFO L226 Difference]: Without dead ends: 3275 [2022-11-16 11:11:22,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1118 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 11:11:22,845 INFO L413 NwaCegarLoop]: 1256 mSDtfsCounter, 11686 mSDsluCounter, 13586 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11686 SdHoareTripleChecker+Valid, 14842 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:22,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11686 Valid, 14842 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:11:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2022-11-16 11:11:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 1347. [2022-11-16 11:11:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:11:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:11:22,873 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 529 [2022-11-16 11:11:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:22,874 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:11:22,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 32.46153846153846) internal successors, (422), 13 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 11:11:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:11:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-11-16 11:11:22,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:22,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:11:22,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:23,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:23,105 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:23,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:23,105 INFO L85 PathProgramCache]: Analyzing trace with hash -108530450, now seen corresponding path program 1 times [2022-11-16 11:11:23,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:23,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470930934] [2022-11-16 11:11:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:23,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:31,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:31,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470930934] [2022-11-16 11:11:31,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470930934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:31,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919151976] [2022-11-16 11:11:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:31,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:31,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:31,582 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:31,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:11:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:34,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 4315 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 11:11:34,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:39,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:41,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919151976] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:41,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:11:41,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 18] total 36 [2022-11-16 11:11:41,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133934737] [2022-11-16 11:11:41,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:11:41,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:11:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:41,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:11:41,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:11:41,640 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 15 states, 15 states have (on average 35.333333333333336) internal successors, (530), 15 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 11:11:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:11:52,923 INFO L93 Difference]: Finished difference Result 4560 states and 7564 transitions. [2022-11-16 11:11:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-16 11:11:52,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 35.333333333333336) internal successors, (530), 15 states have internal predecessors, (530), 0 states have call successors, (0), 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 530 [2022-11-16 11:11:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:11:52,927 INFO L225 Difference]: With dead ends: 4560 [2022-11-16 11:11:52,927 INFO L226 Difference]: Without dead ends: 3951 [2022-11-16 11:11:52,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1071 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=844, Invalid=5008, Unknown=0, NotChecked=0, Total=5852 [2022-11-16 11:11:52,929 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 24602 mSDsluCounter, 4163 mSDsCounter, 0 mSdLazyCounter, 12104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24602 SdHoareTripleChecker+Valid, 4502 SdHoareTripleChecker+Invalid, 12107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:11:52,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24602 Valid, 4502 Invalid, 12107 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 12104 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-16 11:11:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2022-11-16 11:11:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 1380. [2022-11-16 11:11:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 1.659173313995649) internal successors, (2288), 1379 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states 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 11:11:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2288 transitions. [2022-11-16 11:11:52,963 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2288 transitions. Word has length 530 [2022-11-16 11:11:52,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:11:52,964 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2288 transitions. [2022-11-16 11:11:52,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 35.333333333333336) internal successors, (530), 15 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 11:11:52,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2288 transitions. [2022-11-16 11:11:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-11-16 11:11:52,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:11:52,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:11:52,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-16 11:11:53,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:53,191 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:11:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:53,192 INFO L85 PathProgramCache]: Analyzing trace with hash -108470868, now seen corresponding path program 1 times [2022-11-16 11:11:53,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:53,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348420594] [2022-11-16 11:11:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:53,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:22,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:22,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348420594] [2022-11-16 11:12:22,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348420594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:22,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874921724] [2022-11-16 11:12:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:22,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:22,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:22,972 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:22,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:12:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:25,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 4315 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-16 11:12:25,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:30,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:12:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-16 11:12:32,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874921724] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:32,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:12:32,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7, 18] total 32 [2022-11-16 11:12:32,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608363443] [2022-11-16 11:12:32,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:32,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:12:32,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:32,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:12:32,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:12:32,204 INFO L87 Difference]: Start difference. First operand 1380 states and 2288 transitions. Second operand has 14 states, 14 states have (on average 30.357142857142858) internal successors, (425), 14 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 11:12:33,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:33,922 INFO L93 Difference]: Finished difference Result 3941 states and 6537 transitions. [2022-11-16 11:12:33,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 11:12:33,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 30.357142857142858) internal successors, (425), 14 states have internal predecessors, (425), 0 states have call successors, (0), 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 530 [2022-11-16 11:12:33,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:33,927 INFO L225 Difference]: With dead ends: 3941 [2022-11-16 11:12:33,927 INFO L226 Difference]: Without dead ends: 3299 [2022-11-16 11:12:33,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1126 GetRequests, 1065 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=557, Invalid=3349, Unknown=0, NotChecked=0, Total=3906 [2022-11-16 11:12:33,930 INFO L413 NwaCegarLoop]: 1254 mSDtfsCounter, 12693 mSDsluCounter, 14839 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12693 SdHoareTripleChecker+Valid, 16093 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:33,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12693 Valid, 16093 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:12:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3299 states. [2022-11-16 11:12:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3299 to 1347. [2022-11-16 11:12:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1347 states, 1346 states have (on average 1.6597325408618129) internal successors, (2234), 1346 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states 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 11:12:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1347 states to 1347 states and 2234 transitions. [2022-11-16 11:12:33,955 INFO L78 Accepts]: Start accepts. Automaton has 1347 states and 2234 transitions. Word has length 530 [2022-11-16 11:12:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:33,956 INFO L495 AbstractCegarLoop]: Abstraction has 1347 states and 2234 transitions. [2022-11-16 11:12:33,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.357142857142858) internal successors, (425), 14 states have internal predecessors, (425), 0 states have call successors, (0), 0 states 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 11:12:33,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1347 states and 2234 transitions. [2022-11-16 11:12:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-11-16 11:12:33,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:33,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:33,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:34,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 11:12:34,179 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:34,180 INFO L85 PathProgramCache]: Analyzing trace with hash 393695604, now seen corresponding path program 1 times [2022-11-16 11:12:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:34,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497920090] [2022-11-16 11:12:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:01,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497920090] [2022-11-16 11:13:01,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497920090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290005887] [2022-11-16 11:13:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:01,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:01,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:01,848 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:01,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:13:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:04,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 4318 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 11:13:04,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:09,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:11,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290005887] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:11,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:13:11,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7, 19] total 38 [2022-11-16 11:13:11,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742219841] [2022-11-16 11:13:11,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:11,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:13:11,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:13:11,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:13:11,852 INFO L87 Difference]: Start difference. First operand 1347 states and 2234 transitions. Second operand has 16 states, 16 states have (on average 33.1875) internal successors, (531), 16 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 11:13:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:13:24,294 INFO L93 Difference]: Finished difference Result 4596 states and 7624 transitions. [2022-11-16 11:13:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:13:24,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 33.1875) internal successors, (531), 16 states have internal predecessors, (531), 0 states have call successors, (0), 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 531 [2022-11-16 11:13:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:13:24,300 INFO L225 Difference]: With dead ends: 4596 [2022-11-16 11:13:24,300 INFO L226 Difference]: Without dead ends: 3984 [2022-11-16 11:13:24,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1156 GetRequests, 1075 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=978, Invalid=5828, Unknown=0, NotChecked=0, Total=6806 [2022-11-16 11:13:24,304 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 26563 mSDsluCounter, 4491 mSDsCounter, 0 mSdLazyCounter, 13050 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26563 SdHoareTripleChecker+Valid, 4828 SdHoareTripleChecker+Invalid, 13053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:13:24,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26563 Valid, 4828 Invalid, 13053 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 13050 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-11-16 11:13:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2022-11-16 11:13:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 1383. [2022-11-16 11:13:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.6591895803183792) internal successors, (2293), 1382 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states 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 11:13:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2293 transitions. [2022-11-16 11:13:24,335 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2293 transitions. Word has length 531 [2022-11-16 11:13:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:13:24,336 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 2293 transitions. [2022-11-16 11:13:24,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.1875) internal successors, (531), 16 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 11:13:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2293 transitions. [2022-11-16 11:13:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-11-16 11:13:24,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:13:24,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:24,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:13:24,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:13:24,541 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:13:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:13:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash 393755186, now seen corresponding path program 1 times [2022-11-16 11:13:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:13:24,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732006192] [2022-11-16 11:13:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:24,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:13:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:32,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:13:32,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732006192] [2022-11-16 11:13:32,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732006192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:32,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043443959] [2022-11-16 11:13:32,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:13:32,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:13:32,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:13:32,876 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:13:32,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0faf036-1f59-4db1-8399-dcce0b369e56/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:13:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:13:35,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 4318 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-16 11:13:35,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:13:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:13:40,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:13:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-16 11:13:42,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043443959] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:13:42,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:13:42,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [7, 19] total 34 [2022-11-16 11:13:42,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76941029] [2022-11-16 11:13:42,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:13:42,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:13:42,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:13:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:13:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:13:42,509 INFO L87 Difference]: Start difference. First operand 1383 states and 2293 transitions. Second operand has 15 states, 15 states have (on average 28.533333333333335) internal successors, (428), 15 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)