./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewrev.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewrev.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 40cb4a1cdff0a4e27345697e0d771f8cc035da7ed4f2bd40d71a1d68f6e99f3f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:49:14,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:49:14,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:49:14,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:49:14,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:49:14,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:49:14,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:49:14,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:49:14,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:49:14,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:49:14,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:49:14,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:49:14,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:49:14,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:49:14,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:49:14,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:49:14,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:49:14,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:49:14,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:49:14,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:49:14,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:49:14,648 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:49:14,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:49:14,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:49:14,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:49:14,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:49:14,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:49:14,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:49:14,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:49:14,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:49:14,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:49:14,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:49:14,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:49:14,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:49:14,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:49:14,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:49:14,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:49:14,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:49:14,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:49:14,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:49:14,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:49:14,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:49:14,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:49:14,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:49:14,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:49:14,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:49:14,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:49:14,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:49:14,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:49:14,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:49:14,716 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:49:14,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:49:14,717 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:49:14,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:49:14,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:49:14,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:49:14,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:49:14,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:49:14,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:49:14,718 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:49:14,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:49:14,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:49:14,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:49:14,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:49:14,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:49:14,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:49:14,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:14,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:49:14,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:49:14,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:49:14,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:49:14,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:49:14,723 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:49:14,723 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:49:14,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:49:14,723 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_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40cb4a1cdff0a4e27345697e0d771f8cc035da7ed4f2bd40d71a1d68f6e99f3f [2022-11-02 20:49:14,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:49:15,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:49:15,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:49:15,008 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:49:15,008 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:49:15,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-tiling/rewrev.c [2022-11-02 20:49:15,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/data/f3033dda8/80945d92b4e0426098d01a0601cf1e6e/FLAG59114dfe1 [2022-11-02 20:49:15,562 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:49:15,562 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/sv-benchmarks/c/array-tiling/rewrev.c [2022-11-02 20:49:15,569 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/data/f3033dda8/80945d92b4e0426098d01a0601cf1e6e/FLAG59114dfe1 [2022-11-02 20:49:16,051 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/data/f3033dda8/80945d92b4e0426098d01a0601cf1e6e [2022-11-02 20:49:16,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:49:16,057 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:49:16,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:16,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:49:16,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:49:16,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7486e551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16, skipping insertion in model container [2022-11-02 20:49:16,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:49:16,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:49:16,276 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/sv-benchmarks/c/array-tiling/rewrev.c[397,410] [2022-11-02 20:49:16,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:16,300 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:49:16,313 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/sv-benchmarks/c/array-tiling/rewrev.c[397,410] [2022-11-02 20:49:16,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:16,333 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:49:16,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16 WrapperNode [2022-11-02 20:49:16,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:16,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:16,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:49:16,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:49:16,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,350 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,368 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 52 [2022-11-02 20:49:16,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:16,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:49:16,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:49:16,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:49:16,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,389 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:49:16,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:49:16,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:49:16,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:49:16,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (1/1) ... [2022-11-02 20:49:16,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:16,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:16,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:49:16,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:49:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:49:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:49:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:49:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:49:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:49:16,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:49:16,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:49:16,542 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:49:16,544 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:49:16,663 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:49:16,669 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:49:16,670 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:49:16,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:16 BoogieIcfgContainer [2022-11-02 20:49:16,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:49:16,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:49:16,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:49:16,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:49:16,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:49:16" (1/3) ... [2022-11-02 20:49:16,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152f918d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:16, skipping insertion in model container [2022-11-02 20:49:16,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:16" (2/3) ... [2022-11-02 20:49:16,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152f918d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:16, skipping insertion in model container [2022-11-02 20:49:16,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:16" (3/3) ... [2022-11-02 20:49:16,692 INFO L112 eAbstractionObserver]: Analyzing ICFG rewrev.c [2022-11-02 20:49:16,711 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:49:16,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:49:16,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:16,803 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;@4f83d97d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:16,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:49:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:49:16,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:16,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:16,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:16,822 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-11-02 20:49:16,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:16,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680348881] [2022-11-02 20:49:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:16,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:17,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680348881] [2022-11-02 20:49:17,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680348881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:17,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:17,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:17,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478299129] [2022-11-02 20:49:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:17,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:17,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:17,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:17,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:17,066 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 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 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:17,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:17,084 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-11-02 20:49:17,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-02 20:49:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:17,101 INFO L225 Difference]: With dead ends: 29 [2022-11-02 20:49:17,101 INFO L226 Difference]: Without dead ends: 14 [2022-11-02 20:49:17,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:17,111 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:17,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-02 20:49:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-02 20:49:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-02 20:49:17,151 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-02 20:49:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:17,152 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-02 20:49:17,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-02 20:49:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:49:17,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:17,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:17,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:49:17,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:17,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:17,159 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-11-02 20:49:17,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:17,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420756420] [2022-11-02 20:49:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:17,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:17,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420756420] [2022-11-02 20:49:17,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420756420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:17,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:17,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:49:17,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950733786] [2022-11-02 20:49:17,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:17,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:49:17,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:17,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:49:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:17,281 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:17,315 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-02 20:49:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:49:17,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-02 20:49:17,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:17,317 INFO L225 Difference]: With dead ends: 29 [2022-11-02 20:49:17,317 INFO L226 Difference]: Without dead ends: 18 [2022-11-02 20:49:17,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:49:17,319 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:17,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 11 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-02 20:49:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-11-02 20:49:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-02 20:49:17,324 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-02 20:49:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:17,324 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-02 20:49:17,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-02 20:49:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:49:17,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:17,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:17,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:49:17,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-11-02 20:49:17,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:17,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243696822] [2022-11-02 20:49:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:17,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:17,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:17,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243696822] [2022-11-02 20:49:17,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243696822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:17,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:17,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:17,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76973432] [2022-11-02 20:49:17,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:17,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:17,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:17,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:17,451 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:17,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:17,505 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-11-02 20:49:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:49:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-11-02 20:49:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:17,508 INFO L225 Difference]: With dead ends: 26 [2022-11-02 20:49:17,508 INFO L226 Difference]: Without dead ends: 19 [2022-11-02 20:49:17,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:17,511 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:17,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 10 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-02 20:49:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-02 20:49:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:17,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-02 20:49:17,525 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-11-02 20:49:17,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:17,525 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-02 20:49:17,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:17,526 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-02 20:49:17,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:49:17,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:17,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:17,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:49:17,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-11-02 20:49:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:17,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736104733] [2022-11-02 20:49:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:17,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:18,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:18,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736104733] [2022-11-02 20:49:18,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736104733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:18,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294101048] [2022-11-02 20:49:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:18,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:18,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:18,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:18,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:49:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:18,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:49:18,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:18,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:49:18,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:49:18,850 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:49:18,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-02 20:49:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:49:18,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:18,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:49:19,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-11-02 20:49:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:49:19,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294101048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:19,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:19,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-11-02 20:49:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706193831] [2022-11-02 20:49:19,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:19,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:49:19,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:49:19,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:49:19,159 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:19,630 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-02 20:49:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:49:19,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-02 20:49:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:19,632 INFO L225 Difference]: With dead ends: 28 [2022-11-02 20:49:19,632 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 20:49:19,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:49:19,634 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:19,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 46 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 142 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2022-11-02 20:49:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 20:49:19,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-02 20:49:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:19,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-02 20:49:19,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-11-02 20:49:19,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:19,644 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-02 20:49:19,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:19,644 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-02 20:49:19,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:49:19,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:19,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:19,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:19,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:19,846 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-11-02 20:49:19,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:19,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153711184] [2022-11-02 20:49:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:19,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:20,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153711184] [2022-11-02 20:49:20,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153711184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:20,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558917089] [2022-11-02 20:49:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:20,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:20,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:20,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:20,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:49:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:20,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:49:20,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:20,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:49:20,935 INFO L356 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-02 20:49:20,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:21,198 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:49:21,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-11-02 20:49:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:21,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:21,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:49:21,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-02 20:49:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:21,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558917089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:21,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:21,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-02 20:49:21,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201372808] [2022-11-02 20:49:21,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:21,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:49:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:21,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:49:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:49:21,702 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:22,152 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-02 20:49:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:49:22,153 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 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 20 [2022-11-02 20:49:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:22,154 INFO L225 Difference]: With dead ends: 41 [2022-11-02 20:49:22,154 INFO L226 Difference]: Without dead ends: 39 [2022-11-02 20:49:22,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:49:22,155 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:22,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 70 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 107 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-02 20:49:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-02 20:49:22,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-11-02 20:49:22,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-02 20:49:22,168 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 20 [2022-11-02 20:49:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:22,169 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-02 20:49:22,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-02 20:49:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:49:22,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:22,171 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:22,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:22,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:22,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2022-11-02 20:49:22,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:22,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125472754] [2022-11-02 20:49:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:22,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:22,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125472754] [2022-11-02 20:49:22,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125472754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:22,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192463225] [2022-11-02 20:49:22,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:49:22,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:22,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:22,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:22,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:49:22,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:49:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:22,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:49:22,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:22,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:22,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192463225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:22,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:22,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-02 20:49:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823327945] [2022-11-02 20:49:22,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:22,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:49:22,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:22,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:49:22,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:49:22,736 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:22,853 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2022-11-02 20:49:22,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:49:22,853 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 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 24 [2022-11-02 20:49:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:22,856 INFO L225 Difference]: With dead ends: 80 [2022-11-02 20:49:22,857 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 20:49:22,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:49:22,860 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:22,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 49 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 20:49:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-11-02 20:49:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-11-02 20:49:22,874 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 24 [2022-11-02 20:49:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:22,874 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-11-02 20:49:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-11-02 20:49:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:49:22,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:22,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:22,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:23,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:23,091 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 3 times [2022-11-02 20:49:23,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:23,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376684854] [2022-11-02 20:49:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:23,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:23,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376684854] [2022-11-02 20:49:23,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376684854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036534960] [2022-11-02 20:49:23,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:49:23,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:23,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:23,983 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:24,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:49:24,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:49:24,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:24,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:49:24,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:24,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:49:24,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:24,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:24,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:24,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:49:24,725 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:49:24,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-02 20:49:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:24,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:25,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:49:25,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-02 20:49:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:25,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036534960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:25,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:25,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-11-02 20:49:25,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797940709] [2022-11-02 20:49:25,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:25,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:49:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:25,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:49:25,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:49:25,330 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:26,724 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-11-02 20:49:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:49:26,725 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 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 28 [2022-11-02 20:49:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:26,729 INFO L225 Difference]: With dead ends: 81 [2022-11-02 20:49:26,730 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 20:49:26,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=648, Invalid=2432, Unknown=0, NotChecked=0, Total=3080 [2022-11-02 20:49:26,733 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:26,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 80 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 264 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2022-11-02 20:49:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 20:49:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2022-11-02 20:49:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 65 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-11-02 20:49:26,771 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 28 [2022-11-02 20:49:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:26,771 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-11-02 20:49:26,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-11-02 20:49:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:49:26,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:26,773 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:26,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:26,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:49:26,998 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2112796913, now seen corresponding path program 4 times [2022-11-02 20:49:26,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:26,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365266983] [2022-11-02 20:49:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:26,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-02 20:49:27,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:27,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365266983] [2022-11-02 20:49:27,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365266983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:27,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:27,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:49:27,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998908305] [2022-11-02 20:49:27,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:27,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:49:27,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:27,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:49:27,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:27,036 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:27,058 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-11-02 20:49:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:49:27,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 28 [2022-11-02 20:49:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:27,059 INFO L225 Difference]: With dead ends: 89 [2022-11-02 20:49:27,059 INFO L226 Difference]: Without dead ends: 33 [2022-11-02 20:49:27,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:49:27,061 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:27,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:49:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-02 20:49:27,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-02 20:49:27,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-02 20:49:27,067 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2022-11-02 20:49:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:27,068 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-02 20:49:27,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-02 20:49:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:49:27,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:27,069 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:27,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:49:27,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:27,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 5 times [2022-11-02 20:49:27,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:27,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819925689] [2022-11-02 20:49:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:27,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:27,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:27,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819925689] [2022-11-02 20:49:27,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819925689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:27,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542655692] [2022-11-02 20:49:27,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:49:27,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:27,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:27,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:27,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:49:27,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-02 20:49:27,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:27,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-02 20:49:27,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:27,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:27,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542655692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:27,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:27,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 16 [2022-11-02 20:49:27,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968676851] [2022-11-02 20:49:27,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:27,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:49:27,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:27,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:49:27,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:49:27,526 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:27,655 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2022-11-02 20:49:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:49:27,656 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-02 20:49:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:27,657 INFO L225 Difference]: With dead ends: 62 [2022-11-02 20:49:27,657 INFO L226 Difference]: Without dead ends: 39 [2022-11-02 20:49:27,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=160, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:49:27,658 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:27,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 57 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-02 20:49:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-11-02 20:49:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-02 20:49:27,665 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2022-11-02 20:49:27,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:27,665 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-02 20:49:27,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:27,666 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-02 20:49:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:49:27,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:27,666 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:27,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:27,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:27,867 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:27,868 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 6 times [2022-11-02 20:49:27,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:27,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216303492] [2022-11-02 20:49:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:27,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:28,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216303492] [2022-11-02 20:49:28,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216303492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575355187] [2022-11-02 20:49:28,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:49:28,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:28,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:28,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:28,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:49:28,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-02 20:49:28,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:49:28,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:29,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:49:29,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:29,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:29,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:29,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:29,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:29,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:49:29,799 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:49:29,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-02 20:49:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:29,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:35,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:49:35,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-02 20:49:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:35,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575355187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:35,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:35,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-11-02 20:49:35,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315252014] [2022-11-02 20:49:35,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:35,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 20:49:35,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:35,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 20:49:35,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1310, Unknown=2, NotChecked=0, Total=1560 [2022-11-02 20:49:35,459 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:36,732 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-02 20:49:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:49:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 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 36 [2022-11-02 20:49:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:36,734 INFO L225 Difference]: With dead ends: 46 [2022-11-02 20:49:36,734 INFO L226 Difference]: Without dead ends: 44 [2022-11-02 20:49:36,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=661, Invalid=2997, Unknown=2, NotChecked=0, Total=3660 [2022-11-02 20:49:36,737 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:36,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 133 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 167 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-02 20:49:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-02 20:49:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-11-02 20:49:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-11-02 20:49:36,748 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2022-11-02 20:49:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:36,748 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-11-02 20:49:36,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-11-02 20:49:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:49:36,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:36,753 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:36,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:36,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:49:36,978 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:36,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 7 times [2022-11-02 20:49:36,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:36,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307344449] [2022-11-02 20:49:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:36,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:37,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:37,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307344449] [2022-11-02 20:49:37,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307344449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:37,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851956082] [2022-11-02 20:49:37,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:49:37,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:37,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:37,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:37,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:49:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:49:37,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:37,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:37,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851956082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:37,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:37,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 19 [2022-11-02 20:49:37,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802945598] [2022-11-02 20:49:37,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:37,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:49:37,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:37,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:49:37,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:49:37,583 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:37,738 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2022-11-02 20:49:37,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:49:37,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-02 20:49:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:37,739 INFO L225 Difference]: With dead ends: 74 [2022-11-02 20:49:37,739 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 20:49:37,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:49:37,741 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:37,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 57 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 20:49:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-02 20:49:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-02 20:49:37,762 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2022-11-02 20:49:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:37,765 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-02 20:49:37,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 19 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-02 20:49:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:49:37,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:37,770 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:37,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:37,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:49:37,983 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 8 times [2022-11-02 20:49:37,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:37,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517791894] [2022-11-02 20:49:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:37,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:38,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:38,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517791894] [2022-11-02 20:49:38,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517791894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:38,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781330337] [2022-11-02 20:49:38,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:49:38,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:38,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:38,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:39,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:49:39,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:49:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:49:39,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:39,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:49:39,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:39,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:39,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:39,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:39,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:39,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:39,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:40,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:49:40,204 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:49:40,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-02 20:49:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:40,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:41,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:49:41,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-02 20:49:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:41,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781330337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:41,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:41,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 43 [2022-11-02 20:49:41,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56109688] [2022-11-02 20:49:41,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:41,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 20:49:41,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 20:49:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1574, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:49:41,584 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:43,906 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-11-02 20:49:43,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:49:43,906 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-02 20:49:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:43,907 INFO L225 Difference]: With dead ends: 56 [2022-11-02 20:49:43,907 INFO L226 Difference]: Without dead ends: 54 [2022-11-02 20:49:43,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=941, Invalid=4315, Unknown=0, NotChecked=0, Total=5256 [2022-11-02 20:49:43,909 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:43,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 162 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 367 Invalid, 0 Unknown, 168 Unchecked, 0.4s Time] [2022-11-02 20:49:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-02 20:49:43,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-11-02 20:49:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-02 20:49:43,918 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-11-02 20:49:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:43,918 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-02 20:49:43,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9069767441860463) internal successors, (125), 43 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-02 20:49:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:49:43,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:43,919 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:43,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:44,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:44,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 9 times [2022-11-02 20:49:44,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:44,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079039456] [2022-11-02 20:49:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:44,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:44,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:44,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079039456] [2022-11-02 20:49:44,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079039456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:44,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258227603] [2022-11-02 20:49:44,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:49:44,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:44,347 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:44,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:49:44,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:49:44,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:44,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:49:44,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:44,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:44,861 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:44,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258227603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:44,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:44,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 22 [2022-11-02 20:49:44,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253097219] [2022-11-02 20:49:44,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:44,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:49:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:49:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=273, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:49:44,863 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:45,026 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-11-02 20:49:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:49:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 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 48 [2022-11-02 20:49:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:45,027 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:49:45,027 INFO L226 Difference]: Without dead ends: 55 [2022-11-02 20:49:45,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:49:45,028 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:45,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 97 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:49:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-02 20:49:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-11-02 20:49:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-02 20:49:45,038 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 48 [2022-11-02 20:49:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:45,038 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-02 20:49:45,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 22 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:45,038 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-02 20:49:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:49:45,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:45,039 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:45,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:45,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:49:45,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:45,255 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 10 times [2022-11-02 20:49:45,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:45,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760109798] [2022-11-02 20:49:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:45,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 10 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:46,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:46,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760109798] [2022-11-02 20:49:46,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760109798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:46,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349546243] [2022-11-02 20:49:46,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:49:46,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:46,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:46,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:46,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:49:46,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:49:46,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:46,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-02 20:49:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:46,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:49:46,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:46,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:46,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:46,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:47,080 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:49:47,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:49:47,095 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:49:47,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:49:47,154 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:49:47,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:49:47,167 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:49:47,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:49:47,320 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:49:47,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-02 20:49:48,497 INFO L356 Elim1Store]: treesize reduction 62, result has 10.1 percent of original size [2022-11-02 20:49:48,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 19 [2022-11-02 20:49:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 24 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:48,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:52,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349546243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:52,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:52,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 20] total 54 [2022-11-02 20:49:52,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175984859] [2022-11-02 20:49:52,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:52,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-02 20:49:52,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:52,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-02 20:49:52,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2593, Unknown=1, NotChecked=0, Total=2862 [2022-11-02 20:49:52,616 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 54 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:55,320 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2022-11-02 20:49:55,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:49:55,321 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 54 states have internal predecessors, (146), 0 states have call successors, (0), 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 52 [2022-11-02 20:49:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:55,322 INFO L225 Difference]: With dead ends: 59 [2022-11-02 20:49:55,322 INFO L226 Difference]: Without dead ends: 57 [2022-11-02 20:49:55,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 74 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=981, Invalid=5660, Unknown=1, NotChecked=0, Total=6642 [2022-11-02 20:49:55,325 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 120 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:55,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 203 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 369 Invalid, 0 Unknown, 168 Unchecked, 0.3s Time] [2022-11-02 20:49:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-02 20:49:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-02 20:49:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-02 20:49:55,337 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2022-11-02 20:49:55,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:55,338 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-02 20:49:55,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.7037037037037037) internal successors, (146), 54 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-02 20:49:55,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:49:55,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:55,339 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:55,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:55,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:55,546 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:55,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 11 times [2022-11-02 20:49:55,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:55,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822562388] [2022-11-02 20:49:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:55,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:55,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:55,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822562388] [2022-11-02 20:49:55,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822562388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:55,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284560805] [2022-11-02 20:49:55,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:49:55,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:55,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:55,766 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:55,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:49:55,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-02 20:49:55,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:55,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:49:55,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:56,186 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:56,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 88 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:56,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284560805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:56,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:56,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 25 [2022-11-02 20:49:56,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637490758] [2022-11-02 20:49:56,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:56,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:49:56,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:56,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:49:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=356, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:49:56,451 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 25 states, 25 states have (on average 4.4) internal successors, (110), 25 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:49:56,675 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2022-11-02 20:49:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:49:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.4) internal successors, (110), 25 states have internal predecessors, (110), 0 states have call successors, (0), 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 56 [2022-11-02 20:49:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:49:56,678 INFO L225 Difference]: With dead ends: 98 [2022-11-02 20:49:56,678 INFO L226 Difference]: Without dead ends: 63 [2022-11-02 20:49:56,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:49:56,683 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:49:56,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 111 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:49:56,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-02 20:49:56,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-11-02 20:49:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-02 20:49:56,701 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-11-02 20:49:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:49:56,702 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-02 20:49:56,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.4) internal successors, (110), 25 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:49:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-02 20:49:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:49:56,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:49:56,703 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:56,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:56,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:49:56,918 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:49:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 12 times [2022-11-02 20:49:56,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:56,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468330648] [2022-11-02 20:49:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:56,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:58,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468330648] [2022-11-02 20:49:58,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468330648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086083115] [2022-11-02 20:49:58,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:49:58,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:58,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:58,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:58,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:49:58,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-02 20:49:58,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:58,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-02 20:49:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:58,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:49:58,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:58,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:58,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:58,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:58,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:58,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:58,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:58,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:58,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:49:58,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:49:59,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:00,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:50:00,059 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:00,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-02 20:50:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:00,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:06,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:50:06,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-02 20:50:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 17 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:06,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086083115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:06,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:06,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 53 [2022-11-02 20:50:06,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583101931] [2022-11-02 20:50:06,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:06,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-02 20:50:06,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:06,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-02 20:50:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2443, Unknown=1, NotChecked=0, Total=2756 [2022-11-02 20:50:06,167 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:08,765 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-11-02 20:50:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 20:50:08,766 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 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 60 [2022-11-02 20:50:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:08,767 INFO L225 Difference]: With dead ends: 70 [2022-11-02 20:50:08,767 INFO L226 Difference]: Without dead ends: 68 [2022-11-02 20:50:08,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 90 SyntacticMatches, 16 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1156, Invalid=6153, Unknown=1, NotChecked=0, Total=7310 [2022-11-02 20:50:08,769 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 166 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:08,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 262 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 430 Invalid, 0 Unknown, 159 Unchecked, 0.4s Time] [2022-11-02 20:50:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-02 20:50:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-11-02 20:50:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:08,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-02 20:50:08,782 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2022-11-02 20:50:08,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:08,782 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-02 20:50:08,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:08,783 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-02 20:50:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 20:50:08,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:08,783 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:08,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:09,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:50:09,010 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 13 times [2022-11-02 20:50:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:09,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83226767] [2022-11-02 20:50:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:09,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:09,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83226767] [2022-11-02 20:50:09,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83226767] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:09,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805990025] [2022-11-02 20:50:09,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:50:09,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:09,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:09,270 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:09,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:50:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:50:09,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:09,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:09,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805990025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:09,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:09,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 28 [2022-11-02 20:50:09,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248493742] [2022-11-02 20:50:09,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:09,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:50:09,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:09,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:50:09,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:50:09,921 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:10,130 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-11-02 20:50:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:50:10,130 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 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 64 [2022-11-02 20:50:10,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:10,131 INFO L225 Difference]: With dead ends: 110 [2022-11-02 20:50:10,131 INFO L226 Difference]: Without dead ends: 71 [2022-11-02 20:50:10,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=486, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:50:10,132 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:10,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 148 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:10,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-02 20:50:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-02 20:50:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-02 20:50:10,145 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-11-02 20:50:10,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:10,146 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-02 20:50:10,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.5) internal successors, (126), 28 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:10,146 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-02 20:50:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:50:10,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:10,147 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:10,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:10,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:50:10,362 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 14 times [2022-11-02 20:50:10,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:10,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014524251] [2022-11-02 20:50:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:10,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 10 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:12,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:12,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014524251] [2022-11-02 20:50:12,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014524251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:12,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483256194] [2022-11-02 20:50:12,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:50:12,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:12,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:12,222 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:12,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:50:12,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:50:12,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:12,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-02 20:50:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:12,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:50:12,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:12,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:12,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:12,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:12,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:12,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:12,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:12,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:12,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:12,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:12,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:12,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:13,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:14,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:50:14,031 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:14,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-02 20:50:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:14,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:16,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:50:16,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-02 20:50:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 20 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:16,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483256194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:16,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:16,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 60 [2022-11-02 20:50:16,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722506412] [2022-11-02 20:50:16,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:16,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-02 20:50:16,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-02 20:50:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=3118, Unknown=0, NotChecked=0, Total=3540 [2022-11-02 20:50:16,235 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 60 states, 60 states have (on average 3.283333333333333) internal successors, (197), 60 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:19,420 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2022-11-02 20:50:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 20:50:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.283333333333333) internal successors, (197), 60 states have internal predecessors, (197), 0 states have call successors, (0), 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 68 [2022-11-02 20:50:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:19,421 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:50:19,421 INFO L226 Difference]: Without dead ends: 76 [2022-11-02 20:50:19,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 105 SyntacticMatches, 18 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3154 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1570, Invalid=8530, Unknown=0, NotChecked=0, Total=10100 [2022-11-02 20:50:19,425 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 243 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:19,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 318 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 276 Invalid, 0 Unknown, 220 Unchecked, 0.3s Time] [2022-11-02 20:50:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-02 20:50:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-11-02 20:50:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-11-02 20:50:19,438 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2022-11-02 20:50:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:19,438 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-11-02 20:50:19,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.283333333333333) internal successors, (197), 60 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-11-02 20:50:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-02 20:50:19,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:19,440 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:19,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:19,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:50:19,640 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 15 times [2022-11-02 20:50:19,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:19,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319837400] [2022-11-02 20:50:19,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:19,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:19,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:19,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319837400] [2022-11-02 20:50:19,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319837400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:19,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342063838] [2022-11-02 20:50:19,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:50:19,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:19,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:19,920 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:19,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:50:20,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-02 20:50:20,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:50:20,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:20,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 150 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:20,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342063838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:20,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:20,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 31 [2022-11-02 20:50:20,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168159734] [2022-11-02 20:50:20,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:20,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:50:20,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:50:20,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=555, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:50:20,782 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 31 states, 31 states have (on average 4.580645161290323) internal successors, (142), 31 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:21,011 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2022-11-02 20:50:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:50:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.580645161290323) internal successors, (142), 31 states have internal predecessors, (142), 0 states have call successors, (0), 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 72 [2022-11-02 20:50:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:21,013 INFO L225 Difference]: With dead ends: 122 [2022-11-02 20:50:21,013 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 20:50:21,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=595, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:50:21,014 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:21,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 139 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 20:50:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-11-02 20:50:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:21,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-11-02 20:50:21,030 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 72 [2022-11-02 20:50:21,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:21,030 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-11-02 20:50:21,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.580645161290323) internal successors, (142), 31 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:21,031 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-11-02 20:50:21,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-02 20:50:21,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:21,031 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:21,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:21,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:21,246 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:21,246 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 16 times [2022-11-02 20:50:21,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:21,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982699065] [2022-11-02 20:50:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:21,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:23,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:23,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982699065] [2022-11-02 20:50:23,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982699065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:23,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933065445] [2022-11-02 20:50:23,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:50:23,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:23,154 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:23,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:50:23,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:50:23,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:23,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-02 20:50:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:23,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:50:23,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:23,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:23,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:23,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:23,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:23,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:23,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:23,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:23,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:23,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:23,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:23,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:23,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:23,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:23,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:25,183 INFO L356 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2022-11-02 20:50:25,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-11-02 20:50:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:25,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:30,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933065445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:30,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:30,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 65 [2022-11-02 20:50:30,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088980165] [2022-11-02 20:50:30,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:30,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-02 20:50:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:30,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-02 20:50:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=3820, Unknown=1, NotChecked=0, Total=4160 [2022-11-02 20:50:30,650 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 65 states, 65 states have (on average 3.353846153846154) internal successors, (218), 65 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:34,923 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2022-11-02 20:50:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 20:50:34,924 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.353846153846154) internal successors, (218), 65 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-11-02 20:50:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:34,925 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:50:34,925 INFO L226 Difference]: Without dead ends: 84 [2022-11-02 20:50:34,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 121 SyntacticMatches, 27 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1479, Invalid=9232, Unknown=1, NotChecked=0, Total=10712 [2022-11-02 20:50:34,927 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 177 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:34,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 484 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 593 Invalid, 0 Unknown, 207 Unchecked, 0.5s Time] [2022-11-02 20:50:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-02 20:50:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2022-11-02 20:50:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-11-02 20:50:34,945 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2022-11-02 20:50:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:34,945 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-11-02 20:50:34,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.353846153846154) internal successors, (218), 65 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-11-02 20:50:34,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-02 20:50:34,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:34,947 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:34,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:35,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:35,160 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:35,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2057478922, now seen corresponding path program 17 times [2022-11-02 20:50:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:35,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62140114] [2022-11-02 20:50:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:35,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:35,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62140114] [2022-11-02 20:50:35,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62140114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:35,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479461915] [2022-11-02 20:50:35,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:50:35,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:35,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:35,478 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:35,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:50:35,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-02 20:50:35,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:35,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 20:50:35,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:36,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 187 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:36,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479461915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:36,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:36,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 34 [2022-11-02 20:50:36,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707469356] [2022-11-02 20:50:36,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:36,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:50:36,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:36,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:50:36,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=671, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:50:36,583 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:36,848 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2022-11-02 20:50:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:50:36,851 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 0 states have call successors, (0), 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 80 [2022-11-02 20:50:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:36,852 INFO L225 Difference]: With dead ends: 134 [2022-11-02 20:50:36,852 INFO L226 Difference]: Without dead ends: 87 [2022-11-02 20:50:36,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 137 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:50:36,853 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:36,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 173 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-02 20:50:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-11-02 20:50:36,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-02 20:50:36,873 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2022-11-02 20:50:36,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:36,873 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-02 20:50:36,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.647058823529412) internal successors, (158), 34 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-02 20:50:36,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:50:36,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:36,875 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:36,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:37,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:37,102 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:37,103 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 18 times [2022-11-02 20:50:37,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:37,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993811143] [2022-11-02 20:50:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:37,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:39,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:39,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993811143] [2022-11-02 20:50:39,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993811143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:39,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421396421] [2022-11-02 20:50:39,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:50:39,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:39,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:39,365 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:39,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:50:40,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-02 20:50:40,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:40,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-02 20:50:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:40,364 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:50:40,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:40,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:40,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:40,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:40,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:40,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:40,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:40,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:40,813 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:40,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:50:40,830 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:40,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:50:40,896 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:40,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:50:40,909 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:40,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:50:40,974 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:40,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:50:40,988 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:40,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:50:41,053 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:41,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:50:41,066 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:41,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:50:41,244 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:50:41,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:50:42,626 INFO L356 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-11-02 20:50:42,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 13 [2022-11-02 20:50:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 12 proven. 340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:42,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:49,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:50:49,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-02 20:50:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 26 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:49,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421396421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:49,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:49,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 28, 27] total 69 [2022-11-02 20:50:49,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143200610] [2022-11-02 20:50:49,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:49,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-02 20:50:49,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:49,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-02 20:50:49,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=4194, Unknown=0, NotChecked=0, Total=4692 [2022-11-02 20:50:49,759 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 69 states, 69 states have (on average 3.550724637681159) internal successors, (245), 69 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:53,674 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2022-11-02 20:50:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:50:53,677 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.550724637681159) internal successors, (245), 69 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-11-02 20:50:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:53,678 INFO L225 Difference]: With dead ends: 96 [2022-11-02 20:50:53,678 INFO L226 Difference]: Without dead ends: 94 [2022-11-02 20:50:53,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 127 SyntacticMatches, 25 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1849, Invalid=10141, Unknown=0, NotChecked=0, Total=11990 [2022-11-02 20:50:53,680 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 254 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:53,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 521 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 584 Invalid, 0 Unknown, 240 Unchecked, 0.5s Time] [2022-11-02 20:50:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-02 20:50:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-11-02 20:50:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-02 20:50:53,694 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-11-02 20:50:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:53,694 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-02 20:50:53,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.550724637681159) internal successors, (245), 69 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:53,695 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-02 20:50:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-02 20:50:53,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:53,696 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:53,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-02 20:50:53,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:53,898 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:53,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2110702651, now seen corresponding path program 19 times [2022-11-02 20:50:53,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:53,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196749266] [2022-11-02 20:50:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:53,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:54,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:54,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196749266] [2022-11-02 20:50:54,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196749266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:54,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541549735] [2022-11-02 20:50:54,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:50:54,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:54,245 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:54,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:50:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:50:54,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:54,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 228 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:55,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541549735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:55,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:55,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 37 [2022-11-02 20:50:55,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939953437] [2022-11-02 20:50:55,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:55,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:50:55,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:55,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:50:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=798, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:50:55,142 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 37 states, 37 states have (on average 4.702702702702703) internal successors, (174), 37 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:55,446 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2022-11-02 20:50:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 20:50:55,446 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.702702702702703) internal successors, (174), 37 states have internal predecessors, (174), 0 states have call successors, (0), 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 88 [2022-11-02 20:50:55,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:55,447 INFO L225 Difference]: With dead ends: 146 [2022-11-02 20:50:55,447 INFO L226 Difference]: Without dead ends: 95 [2022-11-02 20:50:55,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 151 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=560, Invalid=846, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:50:55,448 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 95 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:55,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 177 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:55,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-02 20:50:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-11-02 20:50:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-11-02 20:50:55,470 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 88 [2022-11-02 20:50:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:55,471 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-11-02 20:50:55,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.702702702702703) internal successors, (174), 37 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:50:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-11-02 20:50:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:50:55,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:55,472 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:55,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-02 20:50:55,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:50:55,686 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:50:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:55,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 20 times [2022-11-02 20:50:55,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:55,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564470245] [2022-11-02 20:50:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:55,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564470245] [2022-11-02 20:50:58,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564470245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:58,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566765286] [2022-11-02 20:50:58,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:50:58,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:58,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:58,178 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:58,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:50:58,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:50:58,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:58,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-02 20:50:58,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:58,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:50:58,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:58,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:58,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:58,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:58,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:58,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:58,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:58,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:58,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:58,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:58,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:58,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:59,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:59,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:59,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:59,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:59,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:50:59,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:50:59,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:00,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:51:00,963 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:51:00,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-02 20:51:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:01,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:07,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:51:07,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-02 20:51:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 29 proven. 402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:08,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566765286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:08,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:08,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29, 29] total 73 [2022-11-02 20:51:08,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074702248] [2022-11-02 20:51:08,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:08,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-02 20:51:08,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:08,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-02 20:51:08,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=4764, Unknown=0, NotChecked=0, Total=5256 [2022-11-02 20:51:08,054 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 73 states, 73 states have (on average 3.684931506849315) internal successors, (269), 73 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:13,392 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2022-11-02 20:51:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-02 20:51:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.684931506849315) internal successors, (269), 73 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-02 20:51:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:13,394 INFO L225 Difference]: With dead ends: 104 [2022-11-02 20:51:13,394 INFO L226 Difference]: Without dead ends: 102 [2022-11-02 20:51:13,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 141 SyntacticMatches, 28 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4074 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=2151, Invalid=13101, Unknown=0, NotChecked=0, Total=15252 [2022-11-02 20:51:13,396 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 266 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:13,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 690 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 929 Invalid, 0 Unknown, 280 Unchecked, 0.7s Time] [2022-11-02 20:51:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-02 20:51:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2022-11-02 20:51:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-11-02 20:51:13,420 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2022-11-02 20:51:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:13,420 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-11-02 20:51:13,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.684931506849315) internal successors, (269), 73 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-11-02 20:51:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-02 20:51:13,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:13,422 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:13,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:13,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:13,634 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:13,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:13,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 21 times [2022-11-02 20:51:13,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:13,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264973578] [2022-11-02 20:51:13,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:13,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:14,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:14,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264973578] [2022-11-02 20:51:14,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264973578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:14,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057459701] [2022-11-02 20:51:14,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:51:14,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:14,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:14,023 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:14,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:51:14,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-02 20:51:14,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:14,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:51:14,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:15,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 273 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:15,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057459701] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:15,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:15,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 26] total 40 [2022-11-02 20:51:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234819882] [2022-11-02 20:51:15,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:15,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 20:51:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 20:51:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=936, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:51:15,664 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 40 states, 40 states have (on average 4.75) internal successors, (190), 40 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:16,003 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2022-11-02 20:51:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:51:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.75) internal successors, (190), 40 states have internal predecessors, (190), 0 states have call successors, (0), 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 96 [2022-11-02 20:51:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:16,012 INFO L225 Difference]: With dead ends: 158 [2022-11-02 20:51:16,012 INFO L226 Difference]: Without dead ends: 103 [2022-11-02 20:51:16,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 165 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=652, Invalid=988, Unknown=0, NotChecked=0, Total=1640 [2022-11-02 20:51:16,014 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:16,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 264 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:51:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-02 20:51:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-11-02 20:51:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-11-02 20:51:16,039 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2022-11-02 20:51:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:16,040 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-11-02 20:51:16,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.75) internal successors, (190), 40 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-11-02 20:51:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-02 20:51:16,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:16,041 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:16,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:51:16,260 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:16,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash 137728423, now seen corresponding path program 22 times [2022-11-02 20:51:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:16,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333550897] [2022-11-02 20:51:16,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:16,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:19,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:19,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333550897] [2022-11-02 20:51:19,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333550897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:19,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098356745] [2022-11-02 20:51:19,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:51:19,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:19,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:19,021 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:19,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:51:19,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:51:19,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:19,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-02 20:51:19,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:19,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:51:19,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:19,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:19,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:21,916 INFO L356 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2022-11-02 20:51:21,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2022-11-02 20:51:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 34 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:21,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 34 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098356745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:29,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:29,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 32, 32] total 80 [2022-11-02 20:51:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690076021] [2022-11-02 20:51:29,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:29,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-02 20:51:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:29,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-02 20:51:29,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=5857, Unknown=1, NotChecked=0, Total=6320 [2022-11-02 20:51:29,332 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 80 states, 80 states have (on average 3.625) internal successors, (290), 80 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:36,868 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-11-02 20:51:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-02 20:51:36,869 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.625) internal successors, (290), 80 states have internal predecessors, (290), 0 states have call successors, (0), 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 100 [2022-11-02 20:51:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:36,870 INFO L225 Difference]: With dead ends: 112 [2022-11-02 20:51:36,870 INFO L226 Difference]: Without dead ends: 110 [2022-11-02 20:51:36,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 162 SyntacticMatches, 31 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=2535, Invalid=15020, Unknown=1, NotChecked=0, Total=17556 [2022-11-02 20:51:36,872 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 380 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:36,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 972 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 945 Invalid, 0 Unknown, 239 Unchecked, 1.0s Time] [2022-11-02 20:51:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-02 20:51:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2022-11-02 20:51:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-11-02 20:51:36,890 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2022-11-02 20:51:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:36,890 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-11-02 20:51:36,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.625) internal successors, (290), 80 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-11-02 20:51:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-02 20:51:36,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:36,891 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:36,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:37,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:51:37,091 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash -216366051, now seen corresponding path program 23 times [2022-11-02 20:51:37,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:37,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144523064] [2022-11-02 20:51:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:37,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 243 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:37,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:37,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144523064] [2022-11-02 20:51:37,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144523064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:37,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800720735] [2022-11-02 20:51:37,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:51:37,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:37,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:37,510 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:37,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:51:38,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-11-02 20:51:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:51:38,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:38,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 322 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:39,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800720735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:39,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:39,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 28] total 43 [2022-11-02 20:51:39,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095749460] [2022-11-02 20:51:39,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:39,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 20:51:39,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:39,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 20:51:39,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=721, Invalid=1085, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:51:39,174 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 43 states, 43 states have (on average 4.790697674418604) internal successors, (206), 43 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:39,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:39,517 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-11-02 20:51:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 20:51:39,518 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.790697674418604) internal successors, (206), 43 states have internal predecessors, (206), 0 states have call successors, (0), 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 104 [2022-11-02 20:51:39,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:39,519 INFO L225 Difference]: With dead ends: 170 [2022-11-02 20:51:39,519 INFO L226 Difference]: Without dead ends: 111 [2022-11-02 20:51:39,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 179 SyntacticMatches, 14 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=751, Invalid=1141, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:51:39,520 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:39,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 275 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:51:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-02 20:51:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-11-02 20:51:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-11-02 20:51:39,546 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-11-02 20:51:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:39,546 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-11-02 20:51:39,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.790697674418604) internal successors, (206), 43 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:51:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-11-02 20:51:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-02 20:51:39,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:39,547 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:39,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:39,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:51:39,747 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:51:39,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:39,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 24 times [2022-11-02 20:51:39,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:39,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465335368] [2022-11-02 20:51:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:39,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 36 proven. 577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:44,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:44,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465335368] [2022-11-02 20:51:44,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465335368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:44,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260773272] [2022-11-02 20:51:44,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:51:44,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:44,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:44,276 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:44,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:51:45,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-02 20:51:45,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:51:45,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-02 20:51:45,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:45,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:51:45,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:45,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:45,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:45,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:45,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:45,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:45,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:45,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:45,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:45,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:46,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:46,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:46,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:46,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:46,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:46,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:51:46,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:51:46,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-11-02 20:51:46,456 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:51:46,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 42 [2022-11-02 20:51:46,471 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:51:46,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-02 20:51:46,559 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:51:46,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 42 [2022-11-02 20:51:46,582 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:51:46,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-02 20:51:46,821 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:51:46,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 43 [2022-11-02 20:51:48,982 INFO L356 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-11-02 20:51:48,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 13 [2022-11-02 20:51:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 27 proven. 586 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:49,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:53,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:51:53,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-02 20:51:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 35 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:51:53,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260773272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:53,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:53,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 33] total 95 [2022-11-02 20:51:53,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827006538] [2022-11-02 20:51:53,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:53,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-02 20:51:53,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-02 20:51:53,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1082, Invalid=7848, Unknown=0, NotChecked=0, Total=8930 [2022-11-02 20:51:53,830 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 95 states, 95 states have (on average 3.336842105263158) internal successors, (317), 95 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:02,358 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2022-11-02 20:52:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-02 20:52:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.336842105263158) internal successors, (317), 95 states have internal predecessors, (317), 0 states have call successors, (0), 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 108 [2022-11-02 20:52:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:02,360 INFO L225 Difference]: With dead ends: 174 [2022-11-02 20:52:02,360 INFO L226 Difference]: Without dead ends: 172 [2022-11-02 20:52:02,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 168 SyntacticMatches, 22 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8691 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=3347, Invalid=22093, Unknown=0, NotChecked=0, Total=25440 [2022-11-02 20:52:02,361 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 380 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 658 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:02,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1225 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1215 Invalid, 0 Unknown, 658 Unchecked, 1.4s Time] [2022-11-02 20:52:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-02 20:52:02,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2022-11-02 20:52:02,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-11-02 20:52:02,394 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2022-11-02 20:52:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:02,394 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-11-02 20:52:02,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.336842105263158) internal successors, (317), 95 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:02,395 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-11-02 20:52:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-02 20:52:02,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:02,395 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:02,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:02,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:52:02,599 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:02,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 25 times [2022-11-02 20:52:02,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:02,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831946445] [2022-11-02 20:52:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:02,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:03,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831946445] [2022-11-02 20:52:03,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831946445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374247575] [2022-11-02 20:52:03,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:52:03,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:03,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:03,024 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:03,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:52:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:03,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 20:52:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:03,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 375 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:04,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374247575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:04,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:04,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 30, 30] total 46 [2022-11-02 20:52:04,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766717453] [2022-11-02 20:52:04,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:04,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:52:04,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:04,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:52:04,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=1245, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:52:04,274 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 46 states, 46 states have (on average 4.826086956521739) internal successors, (222), 46 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:04,696 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2022-11-02 20:52:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 20:52:04,697 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.826086956521739) internal successors, (222), 46 states have internal predecessors, (222), 0 states have call successors, (0), 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 112 [2022-11-02 20:52:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:04,697 INFO L225 Difference]: With dead ends: 182 [2022-11-02 20:52:04,697 INFO L226 Difference]: Without dead ends: 119 [2022-11-02 20:52:04,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 193 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=857, Invalid=1305, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 20:52:04,698 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 129 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:04,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 307 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:52:04,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-02 20:52:04,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-11-02 20:52:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:04,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-11-02 20:52:04,720 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 112 [2022-11-02 20:52:04,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:04,721 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-11-02 20:52:04,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.826086956521739) internal successors, (222), 46 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-11-02 20:52:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-02 20:52:04,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:04,722 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:04,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:04,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 20:52:04,922 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 26 times [2022-11-02 20:52:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:04,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160887345] [2022-11-02 20:52:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:04,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:08,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:08,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160887345] [2022-11-02 20:52:08,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160887345] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:08,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491719124] [2022-11-02 20:52:08,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:52:08,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:08,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:08,583 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:08,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:52:08,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:52:08,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:52:08,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-02 20:52:08,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:08,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:52:09,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:09,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:09,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:09,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:09,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:09,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:09,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:09,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:09,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:09,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:09,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:09,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:09,658 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:09,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:52:09,679 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:09,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:52:09,782 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:09,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:52:09,797 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:09,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:52:09,900 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:09,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:52:09,924 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:09,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:52:10,018 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:10,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:52:10,033 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:10,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:52:10,134 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:10,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:52:10,153 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:10,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 43 [2022-11-02 20:52:10,305 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:10,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 57 [2022-11-02 20:52:10,377 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:10,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 58 [2022-11-02 20:52:10,635 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:10,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 58 [2022-11-02 20:52:13,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:52:13,296 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:13,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 16 [2022-11-02 20:52:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 53 proven. 663 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:13,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:20,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:52:20,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-02 20:52:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 38 proven. 678 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:20,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491719124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:20,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:20,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 37, 35] total 90 [2022-11-02 20:52:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685254199] [2022-11-02 20:52:20,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:20,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-02 20:52:20,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:20,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-02 20:52:20,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=7288, Unknown=0, NotChecked=0, Total=8010 [2022-11-02 20:52:20,716 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 90 states, 90 states have (on average 3.7888888888888888) internal successors, (341), 90 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:27,856 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2022-11-02 20:52:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 20:52:27,857 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.7888888888888888) internal successors, (341), 90 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-11-02 20:52:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:27,857 INFO L225 Difference]: With dead ends: 125 [2022-11-02 20:52:27,858 INFO L226 Difference]: Without dead ends: 123 [2022-11-02 20:52:27,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 176 SyntacticMatches, 42 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6587 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=2757, Invalid=16425, Unknown=0, NotChecked=0, Total=19182 [2022-11-02 20:52:27,859 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 139 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 686 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:27,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 975 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 793 Invalid, 0 Unknown, 686 Unchecked, 0.7s Time] [2022-11-02 20:52:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-02 20:52:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2022-11-02 20:52:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-11-02 20:52:27,882 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2022-11-02 20:52:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:27,882 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-11-02 20:52:27,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.7888888888888888) internal successors, (341), 90 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-11-02 20:52:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-02 20:52:27,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:27,884 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:27,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:28,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:28,100 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:28,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:28,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1492478465, now seen corresponding path program 27 times [2022-11-02 20:52:28,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:28,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441512291] [2022-11-02 20:52:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:28,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:28,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:28,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441512291] [2022-11-02 20:52:28,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441512291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:28,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066160539] [2022-11-02 20:52:28,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:52:28,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:28,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:28,594 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:28,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-02 20:52:30,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-02 20:52:30,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:52:30,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:52:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:30,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 432 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:31,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066160539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:52:31,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:52:31,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32, 32] total 49 [2022-11-02 20:52:31,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250760876] [2022-11-02 20:52:31,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:31,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 20:52:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:31,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 20:52:31,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=936, Invalid=1416, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:52:31,341 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:31,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:52:31,757 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2022-11-02 20:52:31,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 20:52:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-11-02 20:52:31,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:52:31,760 INFO L225 Difference]: With dead ends: 194 [2022-11-02 20:52:31,761 INFO L226 Difference]: Without dead ends: 127 [2022-11-02 20:52:31,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 207 SyntacticMatches, 16 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=970, Invalid=1480, Unknown=0, NotChecked=0, Total=2450 [2022-11-02 20:52:31,762 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 163 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:52:31,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 291 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:52:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-02 20:52:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-02 20:52:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-11-02 20:52:31,787 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 120 [2022-11-02 20:52:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:52:31,787 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-11-02 20:52:31,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:52:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-11-02 20:52:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-02 20:52:31,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:52:31,788 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:52:31,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:52:31,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:31,994 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:52:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:52:31,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1678830778, now seen corresponding path program 28 times [2022-11-02 20:52:31,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:52:31,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151402125] [2022-11-02 20:52:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:52:31,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:52:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:52:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:36,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:52:36,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151402125] [2022-11-02 20:52:36,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151402125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:36,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006164195] [2022-11-02 20:52:36,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:52:36,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:52:36,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:52:36,177 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:52:36,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67db0d57-72b3-4b3a-a798-714e50471df5/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-02 20:52:36,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:52:36,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:52:36,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-02 20:52:36,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:52:36,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:52:36,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:36,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:36,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:36,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:36,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:36,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:36,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:36,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:36,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:36,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:36,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-02 20:52:36,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:52:36,849 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:36,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 20:52:36,860 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:36,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2022-11-02 20:52:36,982 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:36,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2022-11-02 20:52:36,995 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:36,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2022-11-02 20:52:37,077 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2022-11-02 20:52:37,090 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2022-11-02 20:52:37,235 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 72 [2022-11-02 20:52:37,251 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2022-11-02 20:52:37,343 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 72 [2022-11-02 20:52:37,359 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2022-11-02 20:52:37,466 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 72 [2022-11-02 20:52:37,486 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2022-11-02 20:52:37,600 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 72 [2022-11-02 20:52:37,619 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2022-11-02 20:52:37,915 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:52:37,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 73 [2022-11-02 20:52:41,718 INFO L356 Elim1Store]: treesize reduction 106, result has 6.2 percent of original size [2022-11-02 20:52:41,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 101 treesize of output 25 [2022-11-02 20:52:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 111 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:52:41,807 INFO L328 TraceCheckSpWp]: Computing backward predicates...