./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array27_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array27_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU --witnessprinter.witness.filename witness --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 8e2a4cc1bd1815c470836bbbcc9d3775eac69b651b7231d974ae63a065851dd1 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 21:59:14,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 21:59:14,872 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-31 21:59:14,878 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 21:59:14,879 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 21:59:14,905 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 21:59:14,906 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 21:59:14,907 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 21:59:14,907 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 21:59:14,908 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 21:59:14,908 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 21:59:14,909 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 21:59:14,910 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 21:59:14,910 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 21:59:14,911 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 21:59:14,911 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 21:59:14,912 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 21:59:14,912 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 21:59:14,913 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 21:59:14,913 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 21:59:14,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 21:59:14,914 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 21:59:14,915 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 21:59:14,915 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 21:59:14,915 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 21:59:14,916 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 21:59:14,916 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 21:59:14,917 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 21:59:14,917 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 21:59:14,917 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 21:59:14,918 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 21:59:14,918 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 21:59:14,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:59:14,919 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 21:59:14,920 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 21:59:14,920 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 21:59:14,920 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 21:59:14,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 21:59:14,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 21:59:14,921 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 21:59:14,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 21:59:14,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 21:59:14,922 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e2a4cc1bd1815c470836bbbcc9d3775eac69b651b7231d974ae63a065851dd1 [2024-10-31 21:59:15,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 21:59:15,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 21:59:15,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 21:59:15,275 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 21:59:15,276 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 21:59:15,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/array-patterns/array27_pattern.c Unable to find full path for "g++" [2024-10-31 21:59:17,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 21:59:17,657 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 21:59:17,658 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/sv-benchmarks/c/array-patterns/array27_pattern.c [2024-10-31 21:59:17,677 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/data/f317fb239/179a50f713e04815bb294d3086e8ce7b/FLAGbb21c6c49 [2024-10-31 21:59:17,714 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/data/f317fb239/179a50f713e04815bb294d3086e8ce7b [2024-10-31 21:59:17,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 21:59:17,719 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 21:59:17,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 21:59:17,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 21:59:17,730 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 21:59:17,730 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:59:17" (1/1) ... [2024-10-31 21:59:17,732 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9b4e17f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:17, skipping insertion in model container [2024-10-31 21:59:17,732 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 09:59:17" (1/1) ... [2024-10-31 21:59:17,760 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 21:59:17,987 WARN L251 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_c45a4031-34d6-4ec7-8074-56e099889a20/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2024-10-31 21:59:18,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:59:18,028 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 21:59:18,045 WARN L251 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_c45a4031-34d6-4ec7-8074-56e099889a20/sv-benchmarks/c/array-patterns/array27_pattern.c[1253,1266] [2024-10-31 21:59:18,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 21:59:18,082 INFO L204 MainTranslator]: Completed translation [2024-10-31 21:59:18,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18 WrapperNode [2024-10-31 21:59:18,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 21:59:18,085 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 21:59:18,085 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 21:59:18,085 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 21:59:18,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,111 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,142 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2024-10-31 21:59:18,144 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 21:59:18,145 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 21:59:18,145 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 21:59:18,146 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 21:59:18,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,161 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,184 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-31 21:59:18,186 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,194 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,206 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,207 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,213 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 21:59:18,214 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 21:59:18,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 21:59:18,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 21:59:18,215 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (1/1) ... [2024-10-31 21:59:18,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 21:59:18,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:18,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 21:59:18,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 21:59:18,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 21:59:18,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 21:59:18,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 21:59:18,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 21:59:18,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 21:59:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 21:59:18,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 21:59:18,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 21:59:18,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 21:59:18,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 21:59:18,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 21:59:18,431 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 21:59:18,434 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 21:59:18,675 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-10-31 21:59:18,676 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 21:59:18,700 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 21:59:18,701 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 21:59:18,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:59:18 BoogieIcfgContainer [2024-10-31 21:59:18,702 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 21:59:18,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 21:59:18,707 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 21:59:18,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 21:59:18,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 09:59:17" (1/3) ... [2024-10-31 21:59:18,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae6020a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:59:18, skipping insertion in model container [2024-10-31 21:59:18,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 09:59:18" (2/3) ... [2024-10-31 21:59:18,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae6020a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 09:59:18, skipping insertion in model container [2024-10-31 21:59:18,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 09:59:18" (3/3) ... [2024-10-31 21:59:18,717 INFO L112 eAbstractionObserver]: Analyzing ICFG array27_pattern.c [2024-10-31 21:59:18,744 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 21:59:18,745 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 21:59:18,844 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 21:59:18,865 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@ab8e6b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 21:59:18,865 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 21:59:18,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 21:59:18,885 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:18,886 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:18,887 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:18,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:18,899 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2024-10-31 21:59:18,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:18,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617102647] [2024-10-31 21:59:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:19,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:19,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617102647] [2024-10-31 21:59:19,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617102647] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:19,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:19,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 21:59:19,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484297242] [2024-10-31 21:59:19,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:19,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 21:59:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 21:59:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 21:59:19,138 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:19,158 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2024-10-31 21:59:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 21:59:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-10-31 21:59:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:19,166 INFO L225 Difference]: With dead ends: 41 [2024-10-31 21:59:19,166 INFO L226 Difference]: Without dead ends: 18 [2024-10-31 21:59:19,170 INFO L431 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 [2024-10-31 21:59:19,179 INFO L432 NwaCegarLoop]: 26 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, 26 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 [2024-10-31 21:59:19,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 21:59:19,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-31 21:59:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-10-31 21:59:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-10-31 21:59:19,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2024-10-31 21:59:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:19,222 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-10-31 21:59:19,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-10-31 21:59:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 21:59:19,223 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:19,223 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:19,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 21:59:19,224 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:19,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:19,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2024-10-31 21:59:19,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:19,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378132128] [2024-10-31 21:59:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:19,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:19,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:19,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378132128] [2024-10-31 21:59:19,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378132128] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:19,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:19,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 21:59:19,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795644912] [2024-10-31 21:59:19,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:19,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 21:59:19,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:19,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 21:59:19,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:59:19,732 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:19,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:19,849 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2024-10-31 21:59:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 21:59:19,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2024-10-31 21:59:19,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:19,851 INFO L225 Difference]: With dead ends: 36 [2024-10-31 21:59:19,851 INFO L226 Difference]: Without dead ends: 27 [2024-10-31 21:59:19,852 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 21:59:19,853 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:19,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 11 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:59:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-31 21:59:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2024-10-31 21:59:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2024-10-31 21:59:19,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2024-10-31 21:59:19,860 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2024-10-31 21:59:19,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:19,861 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2024-10-31 21:59:19,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:19,861 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2024-10-31 21:59:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-31 21:59:19,862 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:19,862 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:19,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 21:59:19,863 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:19,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:19,864 INFO L85 PathProgramCache]: Analyzing trace with hash 129650620, now seen corresponding path program 1 times [2024-10-31 21:59:19,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:19,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866382065] [2024-10-31 21:59:19,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:19,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 21:59:20,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:20,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866382065] [2024-10-31 21:59:20,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866382065] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 21:59:20,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 21:59:20,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 21:59:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856385606] [2024-10-31 21:59:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 21:59:20,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 21:59:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:20,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 21:59:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:59:20,086 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2024-10-31 21:59:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:20,178 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2024-10-31 21:59:20,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 21:59:20,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) Word has length 16 [2024-10-31 21:59:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:20,179 INFO L225 Difference]: With dead ends: 47 [2024-10-31 21:59:20,180 INFO L226 Difference]: Without dead ends: 32 [2024-10-31 21:59:20,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 21:59:20,181 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:20,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:59:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-31 21:59:20,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2024-10-31 21:59:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-10-31 21:59:20,189 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2024-10-31 21:59:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:20,190 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-10-31 21:59:20,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2024-10-31 21:59:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-10-31 21:59:20,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-31 21:59:20,191 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:20,191 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:20,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 21:59:20,192 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:20,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1705469543, now seen corresponding path program 1 times [2024-10-31 21:59:20,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:20,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472517689] [2024-10-31 21:59:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:20,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:20,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501241796] [2024-10-31 21:59:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:20,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:20,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:20,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:20,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 21:59:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:20,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-31 21:59:20,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:20,543 INFO L378 Elim1Store]: Elim1 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 11 treesize of output 7 [2024-10-31 21:59:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:20,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:22,296 INFO L378 Elim1Store]: Elim1 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 35 treesize of output 33 [2024-10-31 21:59:22,307 INFO L378 Elim1Store]: Elim1 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 55 treesize of output 53 [2024-10-31 21:59:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:22,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:22,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472517689] [2024-10-31 21:59:22,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-31 21:59:22,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501241796] [2024-10-31 21:59:22,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501241796] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:22,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 21:59:22,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-10-31 21:59:22,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577252406] [2024-10-31 21:59:22,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:22,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 21:59:22,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:22,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 21:59:22,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2024-10-31 21:59:22,530 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:24,737 INFO L93 Difference]: Finished difference Result 105 states and 146 transitions. [2024-10-31 21:59:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-31 21:59:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 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 21 [2024-10-31 21:59:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:24,740 INFO L225 Difference]: With dead ends: 105 [2024-10-31 21:59:24,741 INFO L226 Difference]: Without dead ends: 86 [2024-10-31 21:59:24,742 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2024-10-31 21:59:24,743 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 85 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:24,743 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 72 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-10-31 21:59:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-31 21:59:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2024-10-31 21:59:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.375) internal successors, (88), 64 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 88 transitions. [2024-10-31 21:59:24,782 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 88 transitions. Word has length 21 [2024-10-31 21:59:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:24,783 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 88 transitions. [2024-10-31 21:59:24,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 88 transitions. [2024-10-31 21:59:24,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-10-31 21:59:24,786 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:24,786 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:24,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 21:59:24,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:24,988 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:24,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1881533531, now seen corresponding path program 2 times [2024-10-31 21:59:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:24,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046421516] [2024-10-31 21:59:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046421516] [2024-10-31 21:59:25,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046421516] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427531524] [2024-10-31 21:59:25,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:59:25,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:25,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:25,179 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:25,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 21:59:25,252 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:59:25,253 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:25,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 21:59:25,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:25,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:25,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427531524] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:25,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:25,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-10-31 21:59:25,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032316373] [2024-10-31 21:59:25,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:25,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 21:59:25,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:25,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 21:59:25,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-10-31 21:59:25,406 INFO L87 Difference]: Start difference. First operand 65 states and 88 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2024-10-31 21:59:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:25,591 INFO L93 Difference]: Finished difference Result 149 states and 202 transitions. [2024-10-31 21:59:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 21:59:25,592 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) Word has length 23 [2024-10-31 21:59:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:25,594 INFO L225 Difference]: With dead ends: 149 [2024-10-31 21:59:25,594 INFO L226 Difference]: Without dead ends: 108 [2024-10-31 21:59:25,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-31 21:59:25,598 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:25,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:59:25,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-31 21:59:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2024-10-31 21:59:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.368421052631579) internal successors, (130), 95 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2024-10-31 21:59:25,668 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 23 [2024-10-31 21:59:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:25,668 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2024-10-31 21:59:25,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 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) [2024-10-31 21:59:25,669 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2024-10-31 21:59:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-31 21:59:25,670 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:25,670 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:25,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 21:59:25,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:25,874 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:25,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1482958944, now seen corresponding path program 1 times [2024-10-31 21:59:25,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:25,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447324681] [2024-10-31 21:59:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:25,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:59:26,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:26,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447324681] [2024-10-31 21:59:26,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447324681] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:26,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607920212] [2024-10-31 21:59:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:26,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:26,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:26,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:26,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 21:59:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:26,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 21:59:26,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:59:26,239 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:59:26,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607920212] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:26,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:26,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-10-31 21:59:26,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251853329] [2024-10-31 21:59:26,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:26,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 21:59:26,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 21:59:26,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-10-31 21:59:26,322 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:26,772 INFO L93 Difference]: Finished difference Result 199 states and 276 transitions. [2024-10-31 21:59:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-31 21:59:26,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 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 [2024-10-31 21:59:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:26,774 INFO L225 Difference]: With dead ends: 199 [2024-10-31 21:59:26,774 INFO L226 Difference]: Without dead ends: 112 [2024-10-31 21:59:26,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2024-10-31 21:59:26,777 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:26,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 42 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:59:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-10-31 21:59:26,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2024-10-31 21:59:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2024-10-31 21:59:26,828 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 24 [2024-10-31 21:59:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:26,830 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2024-10-31 21:59:26,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2024-10-31 21:59:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-31 21:59:26,832 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:26,832 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:26,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 21:59:27,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:27,033 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:27,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash 929186224, now seen corresponding path program 2 times [2024-10-31 21:59:27,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:27,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532299602] [2024-10-31 21:59:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:27,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 21:59:27,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:27,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532299602] [2024-10-31 21:59:27,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532299602] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:27,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31564083] [2024-10-31 21:59:27,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 21:59:27,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:27,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:27,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 21:59:27,235 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 21:59:27,236 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:27,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 21:59:27,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 21:59:27,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-31 21:59:27,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31564083] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:27,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:27,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-10-31 21:59:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546329502] [2024-10-31 21:59:27,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:27,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 21:59:27,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 21:59:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-31 21:59:27,333 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:27,521 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2024-10-31 21:59:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 21:59:27,522 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 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 27 [2024-10-31 21:59:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:27,523 INFO L225 Difference]: With dead ends: 120 [2024-10-31 21:59:27,523 INFO L226 Difference]: Without dead ends: 91 [2024-10-31 21:59:27,523 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2024-10-31 21:59:27,524 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:27,524 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 23 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 21:59:27,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-10-31 21:59:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2024-10-31 21:59:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.263157894736842) internal successors, (96), 76 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2024-10-31 21:59:27,546 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 27 [2024-10-31 21:59:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:27,546 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2024-10-31 21:59:27,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:27,546 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2024-10-31 21:59:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-31 21:59:27,547 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:27,547 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:27,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 21:59:27,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:27,748 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:27,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash -14420759, now seen corresponding path program 3 times [2024-10-31 21:59:27,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:27,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628489981] [2024-10-31 21:59:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:27,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 21:59:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 21:59:27,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 21:59:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628489981] [2024-10-31 21:59:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628489981] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 21:59:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003981020] [2024-10-31 21:59:27,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 21:59:27,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:27,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:27,871 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:27,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 21:59:27,952 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-31 21:59:27,952 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:27,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 21:59:27,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 21:59:28,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-31 21:59:28,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003981020] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 21:59:28,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 21:59:28,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-10-31 21:59:28,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317124913] [2024-10-31 21:59:28,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 21:59:28,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 21:59:28,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 21:59:28,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 21:59:28,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-31 21:59:28,112 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:28,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 21:59:28,529 INFO L93 Difference]: Finished difference Result 129 states and 164 transitions. [2024-10-31 21:59:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-31 21:59:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2024-10-31 21:59:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 21:59:28,531 INFO L225 Difference]: With dead ends: 129 [2024-10-31 21:59:28,531 INFO L226 Difference]: Without dead ends: 88 [2024-10-31 21:59:28,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2024-10-31 21:59:28,533 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 108 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-31 21:59:28,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 25 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-31 21:59:28,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-31 21:59:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 60. [2024-10-31 21:59:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 59 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2024-10-31 21:59:28,551 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 30 [2024-10-31 21:59:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 21:59:28,552 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2024-10-31 21:59:28,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 21:59:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2024-10-31 21:59:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-10-31 21:59:28,556 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 21:59:28,556 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 21:59:28,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 21:59:28,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 21:59:28,758 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 21:59:28,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 21:59:28,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1156561688, now seen corresponding path program 4 times [2024-10-31 21:59:28,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 21:59:28,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092376295] [2024-10-31 21:59:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 21:59:28,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 21:59:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 21:59:28,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999595258] [2024-10-31 21:59:28,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 21:59:28,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 21:59:28,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 21:59:28,844 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 21:59:28,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c45a4031-34d6-4ec7-8074-56e099889a20/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 21:59:29,033 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 21:59:29,034 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 21:59:29,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-31 21:59:29,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 21:59:29,105 INFO L378 Elim1Store]: Elim1 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 11 treesize of output 7 [2024-10-31 21:59:29,232 INFO L378 Elim1Store]: Elim1 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 19 treesize of output 18 [2024-10-31 21:59:29,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 21:59:29,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-10-31 21:59:29,666 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 21:59:29,667 INFO L378 Elim1Store]: Elim1 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 33 treesize of output 38 [2024-10-31 21:59:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 21:59:30,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 21:59:37,588 INFO L378 Elim1Store]: Elim1 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 267 treesize of output 259 [2024-10-31 21:59:38,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-31 21:59:38,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 39672384678 treesize of output 38397316296