./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/pr5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 374c198ea90130277bd1a124bc94571dd240bc0803e6f3936a68065c719ddd5a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:55:17,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:55:17,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:55:17,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:55:17,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:55:17,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:55:17,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:55:17,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:55:17,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:55:17,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:55:17,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:55:17,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:55:17,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:55:17,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:55:17,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:55:17,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:55:17,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:55:17,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:55:17,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:55:17,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:55:17,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:55:17,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:55:17,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:55:17,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:55:17,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:55:17,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:55:17,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:55:17,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:55:17,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:55:17,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:55:17,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:55:17,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:55:17,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:55:17,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:55:17,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:55:17,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:55:17,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:55:17,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:55:17,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:55:17,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:55:17,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:55:17,307 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:55:17,343 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:55:17,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:55:17,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:55:17,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:55:17,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:55:17,356 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:55:17,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:55:17,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:55:17,357 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:55:17,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:55:17,359 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:55:17,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:55:17,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:55:17,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:55:17,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:55:17,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:55:17,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:55:17,361 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:55:17,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:55:17,361 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:55:17,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:55:17,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:55:17,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:55:17,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:55:17,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:17,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:55:17,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:55:17,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:55:17,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:55:17,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:55:17,364 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:55:17,364 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:55:17,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:55:17,364 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 374c198ea90130277bd1a124bc94571dd240bc0803e6f3936a68065c719ddd5a [2022-11-02 20:55:17,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:55:17,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:55:17,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:55:17,672 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:55:17,673 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:55:17,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-tiling/pr5.c [2022-11-02 20:55:17,742 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/data/46822f934/2bbfaa7e96f445d1a74838741c464983/FLAG0560099cc [2022-11-02 20:55:18,158 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:55:18,159 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/sv-benchmarks/c/array-tiling/pr5.c [2022-11-02 20:55:18,165 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/data/46822f934/2bbfaa7e96f445d1a74838741c464983/FLAG0560099cc [2022-11-02 20:55:18,554 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/data/46822f934/2bbfaa7e96f445d1a74838741c464983 [2022-11-02 20:55:18,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:55:18,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:55:18,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:18,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:55:18,565 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:55:18,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,567 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5c4b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18, skipping insertion in model container [2022-11-02 20:55:18,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:55:18,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:55:18,743 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/sv-benchmarks/c/array-tiling/pr5.c[394,407] [2022-11-02 20:55:18,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:18,782 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:55:18,802 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/sv-benchmarks/c/array-tiling/pr5.c[394,407] [2022-11-02 20:55:18,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:18,843 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:55:18,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18 WrapperNode [2022-11-02 20:55:18,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:18,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:18,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:55:18,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:55:18,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,900 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2022-11-02 20:55:18,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:18,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:55:18,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:55:18,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:55:18,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,940 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:55:18,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:55:18,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:55:18,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:55:18,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (1/1) ... [2022-11-02 20:55:18,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:18,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:18,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:55:18,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:55:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:55:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:55:19,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:55:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:55:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:55:19,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:55:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:55:19,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:55:19,090 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:55:19,092 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:55:19,262 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:55:19,268 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:55:19,268 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:55:19,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:55:19 BoogieIcfgContainer [2022-11-02 20:55:19,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:55:19,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:55:19,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:55:19,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:55:19,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:55:18" (1/3) ... [2022-11-02 20:55:19,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f518704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:55:19, skipping insertion in model container [2022-11-02 20:55:19,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:18" (2/3) ... [2022-11-02 20:55:19,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f518704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:55:19, skipping insertion in model container [2022-11-02 20:55:19,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:55:19" (3/3) ... [2022-11-02 20:55:19,280 INFO L112 eAbstractionObserver]: Analyzing ICFG pr5.c [2022-11-02 20:55:19,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:55:19,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:55:19,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:55:19,376 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d60d58d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:55:19,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:55:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:19,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:55:19,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:19,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:19,388 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash -50963655, now seen corresponding path program 1 times [2022-11-02 20:55:19,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:19,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059422298] [2022-11-02 20:55:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:19,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:19,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059422298] [2022-11-02 20:55:19,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059422298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:19,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:19,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:55:19,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250168112] [2022-11-02 20:55:19,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:19,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:55:19,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:19,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:55:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:55:19,720 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 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 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:19,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:19,739 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2022-11-02 20:55:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:55:19,742 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-02 20:55:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:19,760 INFO L225 Difference]: With dead ends: 49 [2022-11-02 20:55:19,761 INFO L226 Difference]: Without dead ends: 22 [2022-11-02 20:55:19,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:55:19,766 INFO L413 NwaCegarLoop]: 36 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, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:19,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-02 20:55:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-02 20:55:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-11-02 20:55:19,823 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 13 [2022-11-02 20:55:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:19,823 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-11-02 20:55:19,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-11-02 20:55:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:55:19,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:19,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:19,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:55:19,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:19,830 INFO L85 PathProgramCache]: Analyzing trace with hash 629094715, now seen corresponding path program 1 times [2022-11-02 20:55:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:19,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257146198] [2022-11-02 20:55:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:20,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:20,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257146198] [2022-11-02 20:55:20,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257146198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:20,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:20,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:20,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439954576] [2022-11-02 20:55:20,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:20,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:20,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:20,054 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:20,092 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-11-02 20:55:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:55:20,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-02 20:55:20,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:20,094 INFO L225 Difference]: With dead ends: 31 [2022-11-02 20:55:20,094 INFO L226 Difference]: Without dead ends: 29 [2022-11-02 20:55:20,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:20,096 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:20,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:20,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-02 20:55:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-11-02 20:55:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-11-02 20:55:20,101 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 13 [2022-11-02 20:55:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:20,102 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-11-02 20:55:20,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-11-02 20:55:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:55:20,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:20,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:20,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:55:20,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash 629154297, now seen corresponding path program 1 times [2022-11-02 20:55:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:20,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818751268] [2022-11-02 20:55:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:20,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:20,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818751268] [2022-11-02 20:55:20,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818751268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:20,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:20,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:55:20,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472238743] [2022-11-02 20:55:20,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:20,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:55:20,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:20,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:55:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:20,357 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:20,455 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-02 20:55:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:55:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-11-02 20:55:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:20,456 INFO L225 Difference]: With dead ends: 42 [2022-11-02 20:55:20,456 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:55:20,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:20,458 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:20,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:55:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-11-02 20:55:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2022-11-02 20:55:20,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-02 20:55:20,465 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-11-02 20:55:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:20,465 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-02 20:55:20,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-02 20:55:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:55:20,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:20,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:20,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:55:20,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 314139906, now seen corresponding path program 1 times [2022-11-02 20:55:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:20,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352898137] [2022-11-02 20:55:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:20,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:20,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:20,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:20,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352898137] [2022-11-02 20:55:20,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352898137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:20,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:20,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333696104] [2022-11-02 20:55:20,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:20,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:20,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:20,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:20,668 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:20,740 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2022-11-02 20:55:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:55:20,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-02 20:55:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:20,742 INFO L225 Difference]: With dead ends: 61 [2022-11-02 20:55:20,745 INFO L226 Difference]: Without dead ends: 43 [2022-11-02 20:55:20,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:20,747 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:20,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-02 20:55:20,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2022-11-02 20:55:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-11-02 20:55:20,768 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 20 [2022-11-02 20:55:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:20,769 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-11-02 20:55:20,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-11-02 20:55:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:55:20,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:20,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:20,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:55:20,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:20,774 INFO L85 PathProgramCache]: Analyzing trace with hash 994198276, now seen corresponding path program 1 times [2022-11-02 20:55:20,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:20,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656771314] [2022-11-02 20:55:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:20,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:20,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656771314] [2022-11-02 20:55:20,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656771314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:20,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:20,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365450809] [2022-11-02 20:55:20,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:20,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:20,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:20,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:20,933 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:21,011 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2022-11-02 20:55:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:55:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-02 20:55:21,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:21,013 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:55:21,020 INFO L226 Difference]: Without dead ends: 50 [2022-11-02 20:55:21,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:21,022 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:21,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:55:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-02 20:55:21,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2022-11-02 20:55:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-11-02 20:55:21,034 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 20 [2022-11-02 20:55:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:21,035 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-11-02 20:55:21,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-11-02 20:55:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:55:21,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:21,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:21,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:55:21,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:21,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:21,044 INFO L85 PathProgramCache]: Analyzing trace with hash 707166916, now seen corresponding path program 1 times [2022-11-02 20:55:21,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:21,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131768586] [2022-11-02 20:55:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:21,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:21,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131768586] [2022-11-02 20:55:21,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131768586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567888706] [2022-11-02 20:55:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:21,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:21,717 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:21,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:55:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:55:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:22,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:55:22,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:22,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:22,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:22,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:55:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:22,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:22,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-02 20:55:22,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2022-11-02 20:55:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:22,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567888706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:22,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:22,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-11-02 20:55:22,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514322454] [2022-11-02 20:55:22,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:22,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:55:22,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:22,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:55:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:55:22,571 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:23,433 INFO L93 Difference]: Finished difference Result 144 states and 189 transitions. [2022-11-02 20:55:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:55:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-02 20:55:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:23,435 INFO L225 Difference]: With dead ends: 144 [2022-11-02 20:55:23,435 INFO L226 Difference]: Without dead ends: 126 [2022-11-02 20:55:23,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:55:23,437 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 264 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:23,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 143 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 323 Invalid, 0 Unknown, 47 Unchecked, 0.4s Time] [2022-11-02 20:55:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-02 20:55:23,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 61. [2022-11-02 20:55:23,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:23,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2022-11-02 20:55:23,448 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 20 [2022-11-02 20:55:23,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:23,449 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2022-11-02 20:55:23,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2022-11-02 20:55:23,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:55:23,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:23,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:23,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:55:23,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:23,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:23,678 INFO L85 PathProgramCache]: Analyzing trace with hash 407392262, now seen corresponding path program 1 times [2022-11-02 20:55:23,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:23,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940963348] [2022-11-02 20:55:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:23,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:24,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:24,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940963348] [2022-11-02 20:55:24,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940963348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:24,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591466138] [2022-11-02 20:55:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:24,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:24,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:24,243 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:24,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:55:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:24,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:55:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:24,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:55:24,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:24,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:24,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:24,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:55:24,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:55:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:24,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:24,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-02 20:55:24,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-02 20:55:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:24,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591466138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:24,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:24,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 13 [2022-11-02 20:55:24,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960140317] [2022-11-02 20:55:24,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:24,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:55:24,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:24,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:55:24,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:55:24,636 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:25,240 INFO L93 Difference]: Finished difference Result 130 states and 170 transitions. [2022-11-02 20:55:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:55:25,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-02 20:55:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:25,242 INFO L225 Difference]: With dead ends: 130 [2022-11-02 20:55:25,242 INFO L226 Difference]: Without dead ends: 128 [2022-11-02 20:55:25,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:55:25,244 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:25,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 116 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:55:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-02 20:55:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2022-11-02 20:55:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 90 transitions. [2022-11-02 20:55:25,275 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 90 transitions. Word has length 20 [2022-11-02 20:55:25,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:25,275 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 90 transitions. [2022-11-02 20:55:25,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 90 transitions. [2022-11-02 20:55:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:55:25,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:25,277 INFO L195 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, 1, 1] [2022-11-02 20:55:25,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:25,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:25,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:25,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:25,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1616202537, now seen corresponding path program 1 times [2022-11-02 20:55:25,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:25,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033166901] [2022-11-02 20:55:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:25,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:26,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:26,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033166901] [2022-11-02 20:55:26,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033166901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:26,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346840908] [2022-11-02 20:55:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:26,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:26,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:26,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:55:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:26,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:55:26,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:26,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:55:26,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:26,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:26,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:55:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:26,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:26,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:55:26,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-02 20:55:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:26,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346840908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:26,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:26,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-11-02 20:55:26,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521268533] [2022-11-02 20:55:26,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:26,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:55:26,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:55:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:55:26,757 INFO L87 Difference]: Start difference. First operand 64 states and 90 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:27,990 INFO L93 Difference]: Finished difference Result 361 states and 505 transitions. [2022-11-02 20:55:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:55:27,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 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 26 [2022-11-02 20:55:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:27,993 INFO L225 Difference]: With dead ends: 361 [2022-11-02 20:55:27,994 INFO L226 Difference]: Without dead ends: 314 [2022-11-02 20:55:27,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=1443, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:55:27,995 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 316 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:27,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 162 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 439 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-11-02 20:55:27,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-02 20:55:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 135. [2022-11-02 20:55:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.4477611940298507) internal successors, (194), 134 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 194 transitions. [2022-11-02 20:55:28,018 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 194 transitions. Word has length 26 [2022-11-02 20:55:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:28,018 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 194 transitions. [2022-11-02 20:55:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 194 transitions. [2022-11-02 20:55:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:55:28,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:28,020 INFO L195 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, 1, 1] [2022-11-02 20:55:28,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-02 20:55:28,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:28,241 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash 684620053, now seen corresponding path program 1 times [2022-11-02 20:55:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:28,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491374647] [2022-11-02 20:55:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:28,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:28,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:28,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491374647] [2022-11-02 20:55:28,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491374647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:28,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:28,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:28,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124982621] [2022-11-02 20:55:28,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:28,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:28,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:28,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:28,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:28,326 INFO L87 Difference]: Start difference. First operand 135 states and 194 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:28,380 INFO L93 Difference]: Finished difference Result 192 states and 271 transitions. [2022-11-02 20:55:28,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:55:28,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-02 20:55:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:28,383 INFO L225 Difference]: With dead ends: 192 [2022-11-02 20:55:28,383 INFO L226 Difference]: Without dead ends: 140 [2022-11-02 20:55:28,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:28,386 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:28,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-02 20:55:28,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2022-11-02 20:55:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3870967741935485) internal successors, (172), 124 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2022-11-02 20:55:28,429 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 26 [2022-11-02 20:55:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:28,429 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2022-11-02 20:55:28,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2022-11-02 20:55:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:55:28,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:28,438 INFO L195 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, 1, 1] [2022-11-02 20:55:28,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:55:28,439 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -595243625, now seen corresponding path program 1 times [2022-11-02 20:55:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684927993] [2022-11-02 20:55:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:28,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:28,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:28,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684927993] [2022-11-02 20:55:28,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684927993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:28,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:28,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:55:28,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821446567] [2022-11-02 20:55:28,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:28,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:55:28,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:55:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:55:28,531 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:28,583 INFO L93 Difference]: Finished difference Result 154 states and 203 transitions. [2022-11-02 20:55:28,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:55:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-02 20:55:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:28,586 INFO L225 Difference]: With dead ends: 154 [2022-11-02 20:55:28,586 INFO L226 Difference]: Without dead ends: 125 [2022-11-02 20:55:28,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:55:28,588 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:28,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-02 20:55:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2022-11-02 20:55:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 108 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2022-11-02 20:55:28,620 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 26 [2022-11-02 20:55:28,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:28,621 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2022-11-02 20:55:28,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2022-11-02 20:55:28,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:55:28,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:28,622 INFO L195 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, 1, 1] [2022-11-02 20:55:28,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:55:28,622 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash 989711575, now seen corresponding path program 1 times [2022-11-02 20:55:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:28,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229989243] [2022-11-02 20:55:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:28,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:29,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229989243] [2022-11-02 20:55:29,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229989243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550278243] [2022-11-02 20:55:29,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:29,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:29,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:29,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:29,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:55:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:55:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:29,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:55:29,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:29,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:29,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:55:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:29,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:29,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:55:29,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:55:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:29,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550278243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:29,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:29,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-11-02 20:55:29,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33343371] [2022-11-02 20:55:29,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:29,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:55:29,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:29,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:55:29,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:55:29,399 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2022-11-02 20:55:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:30,076 INFO L93 Difference]: Finished difference Result 248 states and 321 transitions. [2022-11-02 20:55:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:55:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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 26 [2022-11-02 20:55:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:30,078 INFO L225 Difference]: With dead ends: 248 [2022-11-02 20:55:30,078 INFO L226 Difference]: Without dead ends: 246 [2022-11-02 20:55:30,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:55:30,079 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 121 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:30,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 139 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:55:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-02 20:55:30,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 130. [2022-11-02 20:55:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3565891472868217) internal successors, (175), 129 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-11-02 20:55:30,096 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 26 [2022-11-02 20:55:30,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:30,096 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-11-02 20:55:30,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 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) [2022-11-02 20:55:30,097 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-11-02 20:55:30,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:55:30,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:30,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:30,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-02 20:55:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:55:30,321 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:30,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:30,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1583768663, now seen corresponding path program 1 times [2022-11-02 20:55:30,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:30,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678016630] [2022-11-02 20:55:30,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:30,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:30,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:30,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678016630] [2022-11-02 20:55:30,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678016630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:30,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:30,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:55:30,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328413910] [2022-11-02 20:55:30,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:30,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:55:30,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:55:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:30,396 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2022-11-02 20:55:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:30,430 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2022-11-02 20:55:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:55:30,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) Word has length 27 [2022-11-02 20:55:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:30,432 INFO L225 Difference]: With dead ends: 162 [2022-11-02 20:55:30,432 INFO L226 Difference]: Without dead ends: 127 [2022-11-02 20:55:30,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:30,433 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:30,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-02 20:55:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2022-11-02 20:55:30,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3363636363636364) internal successors, (147), 110 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2022-11-02 20:55:30,446 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 27 [2022-11-02 20:55:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:30,446 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2022-11-02 20:55:30,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) [2022-11-02 20:55:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2022-11-02 20:55:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:55:30,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:30,447 INFO L195 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, 1, 1] [2022-11-02 20:55:30,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:55:30,448 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash -958935894, now seen corresponding path program 2 times [2022-11-02 20:55:30,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:30,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884418662] [2022-11-02 20:55:30,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:30,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:30,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884418662] [2022-11-02 20:55:30,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884418662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:30,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582237104] [2022-11-02 20:55:30,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:55:30,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:30,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:30,824 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:30,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:55:30,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:55:30,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:30,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:55:30,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:30,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:55:31,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:31,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:55:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:31,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:31,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-11-02 20:55:31,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 259 [2022-11-02 20:55:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:31,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582237104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:31,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:31,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 28 [2022-11-02 20:55:31,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916114064] [2022-11-02 20:55:31,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:31,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:55:31,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:31,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:55:31,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:55:31,954 INFO L87 Difference]: Start difference. First operand 111 states and 147 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 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) [2022-11-02 20:55:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:34,840 INFO L93 Difference]: Finished difference Result 451 states and 571 transitions. [2022-11-02 20:55:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-02 20:55:34,841 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 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) Word has length 32 [2022-11-02 20:55:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:34,842 INFO L225 Difference]: With dead ends: 451 [2022-11-02 20:55:34,842 INFO L226 Difference]: Without dead ends: 415 [2022-11-02 20:55:34,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=884, Invalid=4518, Unknown=0, NotChecked=0, Total=5402 [2022-11-02 20:55:34,845 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 506 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:34,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 136 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 546 Invalid, 0 Unknown, 76 Unchecked, 0.8s Time] [2022-11-02 20:55:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-02 20:55:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 163. [2022-11-02 20:55:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.2901234567901234) internal successors, (209), 162 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 209 transitions. [2022-11-02 20:55:34,871 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 209 transitions. Word has length 32 [2022-11-02 20:55:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:34,872 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 209 transitions. [2022-11-02 20:55:34,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 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) [2022-11-02 20:55:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 209 transitions. [2022-11-02 20:55:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-02 20:55:34,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:34,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:34,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:35,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:55:35,089 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1605606378, now seen corresponding path program 1 times [2022-11-02 20:55:35,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:35,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851524058] [2022-11-02 20:55:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:35,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:55:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851524058] [2022-11-02 20:55:35,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851524058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:35,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:35,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:55:35,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377703870] [2022-11-02 20:55:35,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:35,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:55:35,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:55:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:35,136 INFO L87 Difference]: Start difference. First operand 163 states and 209 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:35,188 INFO L93 Difference]: Finished difference Result 195 states and 245 transitions. [2022-11-02 20:55:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:55:35,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 33 [2022-11-02 20:55:35,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:35,190 INFO L225 Difference]: With dead ends: 195 [2022-11-02 20:55:35,190 INFO L226 Difference]: Without dead ends: 154 [2022-11-02 20:55:35,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:35,191 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:35,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:35,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-02 20:55:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 138. [2022-11-02 20:55:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.27007299270073) internal successors, (174), 137 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:35,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2022-11-02 20:55:35,209 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 33 [2022-11-02 20:55:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:35,210 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2022-11-02 20:55:35,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:35,210 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2022-11-02 20:55:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:55:35,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:35,211 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:35,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:55:35,211 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:35,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:35,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1633319485, now seen corresponding path program 3 times [2022-11-02 20:55:35,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:35,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203935564] [2022-11-02 20:55:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:35,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:35,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:35,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203935564] [2022-11-02 20:55:35,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203935564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900540626] [2022-11-02 20:55:35,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:55:35,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:35,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:35,701 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:35,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:55:35,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:55:35,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:35,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:55:35,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:35,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:55:35,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:55:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:36,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:36,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:55:36,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-02 20:55:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:36,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900540626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:36,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:36,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-02 20:55:36,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563450437] [2022-11-02 20:55:36,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:36,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:55:36,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:55:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:55:36,611 INFO L87 Difference]: Start difference. First operand 138 states and 174 transitions. Second operand has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:39,787 INFO L93 Difference]: Finished difference Result 505 states and 606 transitions. [2022-11-02 20:55:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 20:55:39,788 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 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 38 [2022-11-02 20:55:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:39,790 INFO L225 Difference]: With dead ends: 505 [2022-11-02 20:55:39,790 INFO L226 Difference]: Without dead ends: 495 [2022-11-02 20:55:39,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 58 SyntacticMatches, 13 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=984, Invalid=4868, Unknown=0, NotChecked=0, Total=5852 [2022-11-02 20:55:39,792 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 495 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:39,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 271 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 966 Invalid, 0 Unknown, 106 Unchecked, 1.1s Time] [2022-11-02 20:55:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-02 20:55:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 168. [2022-11-02 20:55:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2455089820359282) internal successors, (208), 167 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:39,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2022-11-02 20:55:39,821 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 38 [2022-11-02 20:55:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:39,822 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2022-11-02 20:55:39,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2022-11-02 20:55:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:55:39,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:39,823 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:39,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:40,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:55:40,033 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:40,033 INFO L85 PathProgramCache]: Analyzing trace with hash -546292993, now seen corresponding path program 1 times [2022-11-02 20:55:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:40,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918480543] [2022-11-02 20:55:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:40,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:40,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918480543] [2022-11-02 20:55:40,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918480543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:40,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409844303] [2022-11-02 20:55:40,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:40,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:40,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:40,474 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:40,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:55:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:40,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:55:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:40,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:55:40,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:55:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:40,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:40,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:55:40,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:55:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:40,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409844303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:40,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:40,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-11-02 20:55:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150937913] [2022-11-02 20:55:40,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:40,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:55:40,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:40,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:55:40,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:55:40,960 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 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) [2022-11-02 20:55:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:43,289 INFO L93 Difference]: Finished difference Result 552 states and 661 transitions. [2022-11-02 20:55:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-02 20:55:43,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 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) Word has length 38 [2022-11-02 20:55:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:43,291 INFO L225 Difference]: With dead ends: 552 [2022-11-02 20:55:43,291 INFO L226 Difference]: Without dead ends: 550 [2022-11-02 20:55:43,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1053, Invalid=6087, Unknown=0, NotChecked=0, Total=7140 [2022-11-02 20:55:43,294 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 285 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:43,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 252 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:55:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-02 20:55:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 200. [2022-11-02 20:55:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.2462311557788945) internal successors, (248), 199 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2022-11-02 20:55:43,334 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 38 [2022-11-02 20:55:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:43,334 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2022-11-02 20:55:43,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 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) [2022-11-02 20:55:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2022-11-02 20:55:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:55:43,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:43,335 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:43,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:43,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:43,549 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:43,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2003079792, now seen corresponding path program 4 times [2022-11-02 20:55:43,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:43,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733831199] [2022-11-02 20:55:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:43,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:43,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:43,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733831199] [2022-11-02 20:55:43,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733831199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:43,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870134603] [2022-11-02 20:55:43,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:55:43,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:43,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:43,925 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:43,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:55:44,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:55:44,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:44,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:55:44,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:44,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:55:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:44,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:44,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-02 20:55:44,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-11-02 20:55:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870134603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:44,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:44,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 27 [2022-11-02 20:55:44,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785753585] [2022-11-02 20:55:44,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:55:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:55:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:55:44,619 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:47,350 INFO L93 Difference]: Finished difference Result 648 states and 768 transitions. [2022-11-02 20:55:47,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-02 20:55:47,351 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-02 20:55:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:47,353 INFO L225 Difference]: With dead ends: 648 [2022-11-02 20:55:47,353 INFO L226 Difference]: Without dead ends: 638 [2022-11-02 20:55:47,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1018, Invalid=6464, Unknown=0, NotChecked=0, Total=7482 [2022-11-02 20:55:47,356 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 395 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:47,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 235 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:55:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-11-02 20:55:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 224. [2022-11-02 20:55:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.2286995515695067) internal successors, (274), 223 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 274 transitions. [2022-11-02 20:55:47,400 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 274 transitions. Word has length 44 [2022-11-02 20:55:47,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:47,401 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 274 transitions. [2022-11-02 20:55:47,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:47,407 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 274 transitions. [2022-11-02 20:55:47,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:55:47,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:47,408 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:47,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:47,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:55:47,623 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:47,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:47,623 INFO L85 PathProgramCache]: Analyzing trace with hash -2075466350, now seen corresponding path program 1 times [2022-11-02 20:55:47,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:47,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239913320] [2022-11-02 20:55:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:47,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:47,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:47,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239913320] [2022-11-02 20:55:47,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239913320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:47,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742504732] [2022-11-02 20:55:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:47,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:47,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:47,978 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:48,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:55:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:55:48,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:48,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:55:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:48,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:48,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:55:48,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:55:48,385 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:48,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742504732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:48,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:48,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-11-02 20:55:48,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703966143] [2022-11-02 20:55:48,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:48,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:55:48,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:55:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:55:48,387 INFO L87 Difference]: Start difference. First operand 224 states and 274 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:51,768 INFO L93 Difference]: Finished difference Result 928 states and 1112 transitions. [2022-11-02 20:55:51,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-02 20:55:51,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-02 20:55:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:51,771 INFO L225 Difference]: With dead ends: 928 [2022-11-02 20:55:51,772 INFO L226 Difference]: Without dead ends: 926 [2022-11-02 20:55:51,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5384 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1389, Invalid=12653, Unknown=0, NotChecked=0, Total=14042 [2022-11-02 20:55:51,776 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 212 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:51,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 417 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-02 20:55:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-11-02 20:55:51,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 340. [2022-11-02 20:55:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.2625368731563422) internal successors, (428), 339 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:51,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 428 transitions. [2022-11-02 20:55:51,841 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 428 transitions. Word has length 44 [2022-11-02 20:55:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:51,841 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 428 transitions. [2022-11-02 20:55:51,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 428 transitions. [2022-11-02 20:55:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:55:51,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:51,843 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:51,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:52,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:52,061 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:52,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1961854480, now seen corresponding path program 1 times [2022-11-02 20:55:52,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:52,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514292545] [2022-11-02 20:55:52,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:52,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-02 20:55:52,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:52,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514292545] [2022-11-02 20:55:52,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514292545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:55:52,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:55:52,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:55:52,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65219913] [2022-11-02 20:55:52,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:55:52,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:55:52,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:52,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:55:52,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:52,108 INFO L87 Difference]: Start difference. First operand 340 states and 428 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:52,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:52,200 INFO L93 Difference]: Finished difference Result 380 states and 473 transitions. [2022-11-02 20:55:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:55:52,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 45 [2022-11-02 20:55:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:52,202 INFO L225 Difference]: With dead ends: 380 [2022-11-02 20:55:52,202 INFO L226 Difference]: Without dead ends: 302 [2022-11-02 20:55:52,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:55:52,205 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:52,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 44 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:55:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-02 20:55:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 286. [2022-11-02 20:55:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.249122807017544) internal successors, (356), 285 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 356 transitions. [2022-11-02 20:55:52,257 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 356 transitions. Word has length 45 [2022-11-02 20:55:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:52,258 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 356 transitions. [2022-11-02 20:55:52,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 356 transitions. [2022-11-02 20:55:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 20:55:52,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:52,259 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:52,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:55:52,259 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:52,260 INFO L85 PathProgramCache]: Analyzing trace with hash -255895901, now seen corresponding path program 5 times [2022-11-02 20:55:52,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:52,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096386634] [2022-11-02 20:55:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:52,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:52,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:52,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096386634] [2022-11-02 20:55:52,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096386634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:52,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269275431] [2022-11-02 20:55:52,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:55:52,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:52,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:52,663 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:52,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:55:52,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-02 20:55:52,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:52,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:55:52,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:53,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:53,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269275431] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:53,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:53,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-11-02 20:55:53,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459326716] [2022-11-02 20:55:53,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:53,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:55:53,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:53,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:55:53,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:55:53,599 INFO L87 Difference]: Start difference. First operand 286 states and 356 transitions. Second operand has 33 states, 33 states have (on average 4.151515151515151) internal successors, (137), 33 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:55:54,005 INFO L93 Difference]: Finished difference Result 477 states and 573 transitions. [2022-11-02 20:55:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:55:54,005 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.151515151515151) internal successors, (137), 33 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-02 20:55:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:55:54,007 INFO L225 Difference]: With dead ends: 477 [2022-11-02 20:55:54,007 INFO L226 Difference]: Without dead ends: 345 [2022-11-02 20:55:54,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:55:54,009 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 291 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:55:54,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 182 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:55:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-02 20:55:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 303. [2022-11-02 20:55:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.228476821192053) internal successors, (371), 302 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 371 transitions. [2022-11-02 20:55:54,073 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 371 transitions. Word has length 50 [2022-11-02 20:55:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:55:54,074 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 371 transitions. [2022-11-02 20:55:54,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.151515151515151) internal successors, (137), 33 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:55:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 371 transitions. [2022-11-02 20:55:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-02 20:55:54,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:54,075 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:55:54,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:55:54,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:54,301 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:54,301 INFO L85 PathProgramCache]: Analyzing trace with hash 588720312, now seen corresponding path program 6 times [2022-11-02 20:55:54,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:54,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962390196] [2022-11-02 20:55:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:55:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:55,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:55:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962390196] [2022-11-02 20:55:55,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962390196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:55:55,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125893120] [2022-11-02 20:55:55,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:55:55,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:55:55,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:55,024 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:55:55,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:55:55,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-02 20:55:55,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:55:55,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:55:55,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:55:55,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:55:55,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:55,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:55,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:55:55,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:55:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:55,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:55:56,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:55:56,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-02 20:55:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:55:56,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125893120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:55:56,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:55:56,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-11-02 20:55:56,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276787448] [2022-11-02 20:55:56,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:55:56,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 20:55:56,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:55:56,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 20:55:56,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:55:56,632 INFO L87 Difference]: Start difference. First operand 303 states and 371 transitions. Second operand has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:10,737 INFO L93 Difference]: Finished difference Result 1374 states and 1623 transitions. [2022-11-02 20:56:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-11-02 20:56:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 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 57 [2022-11-02 20:56:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:10,741 INFO L225 Difference]: With dead ends: 1374 [2022-11-02 20:56:10,741 INFO L226 Difference]: Without dead ends: 1239 [2022-11-02 20:56:10,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 91 SyntacticMatches, 51 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21440 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4333, Invalid=39139, Unknown=0, NotChecked=0, Total=43472 [2022-11-02 20:56:10,747 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1195 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 1453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 4068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1453 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:10,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 675 Invalid, 4068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1453 Valid, 2348 Invalid, 0 Unknown, 267 Unchecked, 2.8s Time] [2022-11-02 20:56:10,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-11-02 20:56:10,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 420. [2022-11-02 20:56:10,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.1909307875894988) internal successors, (499), 419 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 499 transitions. [2022-11-02 20:56:10,850 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 499 transitions. Word has length 57 [2022-11-02 20:56:10,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:10,851 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 499 transitions. [2022-11-02 20:56:10,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:10,851 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 499 transitions. [2022-11-02 20:56:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-02 20:56:10,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:10,852 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:10,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:11,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-02 20:56:11,061 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1863223928, now seen corresponding path program 2 times [2022-11-02 20:56:11,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:11,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134569591] [2022-11-02 20:56:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:11,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:11,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:11,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134569591] [2022-11-02 20:56:11,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134569591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:11,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344144008] [2022-11-02 20:56:11,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:56:11,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:11,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:11,568 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:11,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:56:11,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:56:11,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:11,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:56:11,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:11,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:56:11,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:11,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:11,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:11,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:11,990 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:56:11,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-11-02 20:56:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:12,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:12,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:56:12,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:56:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:12,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344144008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:12,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:12,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-11-02 20:56:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575311981] [2022-11-02 20:56:12,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:12,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:56:12,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:56:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:56:12,181 INFO L87 Difference]: Start difference. First operand 420 states and 499 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:17,357 INFO L93 Difference]: Finished difference Result 1214 states and 1423 transitions. [2022-11-02 20:56:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-11-02 20:56:17,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 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 57 [2022-11-02 20:56:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:17,365 INFO L225 Difference]: With dead ends: 1214 [2022-11-02 20:56:17,366 INFO L226 Difference]: Without dead ends: 1212 [2022-11-02 20:56:17,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 102 SyntacticMatches, 10 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8608 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1761, Invalid=19995, Unknown=0, NotChecked=0, Total=21756 [2022-11-02 20:56:17,369 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 388 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 3490 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 3868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 3490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:17,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 339 Invalid, 3868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 3490 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-02 20:56:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-11-02 20:56:17,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 454. [2022-11-02 20:56:17,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.1876379690949228) internal successors, (538), 453 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2022-11-02 20:56:17,460 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 57 [2022-11-02 20:56:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:17,461 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2022-11-02 20:56:17,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2022-11-02 20:56:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 20:56:17,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:17,462 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:17,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:17,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-02 20:56:17,689 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash -197389365, now seen corresponding path program 7 times [2022-11-02 20:56:17,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:17,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881638645] [2022-11-02 20:56:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:17,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:18,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:18,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881638645] [2022-11-02 20:56:18,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881638645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:18,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331069568] [2022-11-02 20:56:18,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:56:18,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:18,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:18,394 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:18,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:56:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:56:18,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:18,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:56:18,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:18,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:18,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:19,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:19,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2022-11-02 20:56:19,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-02 20:56:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:19,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331069568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:19,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:19,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 39 [2022-11-02 20:56:19,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199780309] [2022-11-02 20:56:19,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:19,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 20:56:19,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 20:56:19,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:56:19,775 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 39 states, 39 states have (on average 4.384615384615385) internal successors, (171), 39 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:29,399 INFO L93 Difference]: Finished difference Result 1519 states and 1815 transitions. [2022-11-02 20:56:29,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-11-02 20:56:29,400 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.384615384615385) internal successors, (171), 39 states have internal predecessors, (171), 0 states have call successors, (0), 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 63 [2022-11-02 20:56:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:29,405 INFO L225 Difference]: With dead ends: 1519 [2022-11-02 20:56:29,405 INFO L226 Difference]: Without dead ends: 1487 [2022-11-02 20:56:29,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14209 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=4019, Invalid=34987, Unknown=0, NotChecked=0, Total=39006 [2022-11-02 20:56:29,408 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 681 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 1323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 3490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1323 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:29,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 533 Invalid, 3490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1323 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-02 20:56:29,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-11-02 20:56:29,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 502. [2022-11-02 20:56:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.1796407185628743) internal successors, (591), 501 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 591 transitions. [2022-11-02 20:56:29,508 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 591 transitions. Word has length 63 [2022-11-02 20:56:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:29,508 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 591 transitions. [2022-11-02 20:56:29,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.384615384615385) internal successors, (171), 39 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 591 transitions. [2022-11-02 20:56:29,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 20:56:29,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:29,509 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:29,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-02 20:56:29,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:56:29,713 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:29,713 INFO L85 PathProgramCache]: Analyzing trace with hash -632220725, now seen corresponding path program 2 times [2022-11-02 20:56:29,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:29,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511752337] [2022-11-02 20:56:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:29,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:30,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:30,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511752337] [2022-11-02 20:56:30,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511752337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:30,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17534637] [2022-11-02 20:56:30,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:56:30,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:30,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:30,249 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:30,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:56:30,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:56:30,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:30,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:56:30,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:30,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:56:30,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:30,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:30,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:30,710 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:56:30,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-11-02 20:56:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:30,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:30,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:56:30,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:56:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:30,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17534637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:30,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:30,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2022-11-02 20:56:30,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841756997] [2022-11-02 20:56:30,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:30,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:56:30,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:56:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:56:30,909 INFO L87 Difference]: Start difference. First operand 502 states and 591 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:37,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:37,476 INFO L93 Difference]: Finished difference Result 1335 states and 1550 transitions. [2022-11-02 20:56:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-11-02 20:56:37,477 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 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 63 [2022-11-02 20:56:37,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:37,479 INFO L225 Difference]: With dead ends: 1335 [2022-11-02 20:56:37,479 INFO L226 Difference]: Without dead ends: 1333 [2022-11-02 20:56:37,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 113 SyntacticMatches, 9 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16048 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2738, Invalid=35874, Unknown=0, NotChecked=0, Total=38612 [2022-11-02 20:56:37,482 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 539 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 3720 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 4191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 3720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:37,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 418 Invalid, 4191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 3720 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-02 20:56:37,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-11-02 20:56:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 508. [2022-11-02 20:56:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.1794871794871795) internal successors, (598), 507 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 598 transitions. [2022-11-02 20:56:37,594 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 598 transitions. Word has length 63 [2022-11-02 20:56:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:37,594 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 598 transitions. [2022-11-02 20:56:37,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 598 transitions. [2022-11-02 20:56:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:56:37,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:37,596 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:37,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-02 20:56:37,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:56:37,817 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1613028194, now seen corresponding path program 8 times [2022-11-02 20:56:37,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:37,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093261121] [2022-11-02 20:56:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:37,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:38,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:38,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093261121] [2022-11-02 20:56:38,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093261121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:38,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157781706] [2022-11-02 20:56:38,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:56:38,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:38,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:38,457 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:38,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:56:38,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:56:38,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:56:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:56:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:38,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:56:38,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:38,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:56:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:39,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:40,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-02 20:56:40,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-11-02 20:56:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:40,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157781706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:40,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:40,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 18] total 47 [2022-11-02 20:56:40,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518680848] [2022-11-02 20:56:40,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:40,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-02 20:56:40,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:40,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-02 20:56:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 20:56:40,429 INFO L87 Difference]: Start difference. First operand 508 states and 598 transitions. Second operand has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:55,727 INFO L93 Difference]: Finished difference Result 2650 states and 3081 transitions. [2022-11-02 20:56:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-11-02 20:56:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 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 69 [2022-11-02 20:56:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:55,731 INFO L225 Difference]: With dead ends: 2650 [2022-11-02 20:56:55,731 INFO L226 Difference]: Without dead ends: 2207 [2022-11-02 20:56:55,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18802 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=5078, Invalid=46678, Unknown=0, NotChecked=0, Total=51756 [2022-11-02 20:56:55,736 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 795 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 4131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:55,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 566 Invalid, 4131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 3252 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-02 20:56:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2022-11-02 20:56:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 914. [2022-11-02 20:56:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 1.171960569550931) internal successors, (1070), 913 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1070 transitions. [2022-11-02 20:56:55,942 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1070 transitions. Word has length 69 [2022-11-02 20:56:55,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:55,942 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1070 transitions. [2022-11-02 20:56:55,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1070 transitions. [2022-11-02 20:56:55,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:56:55,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:55,945 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:55,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:56,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:56,169 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:56,169 INFO L85 PathProgramCache]: Analyzing trace with hash -977475174, now seen corresponding path program 1 times [2022-11-02 20:56:56,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:56,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602578161] [2022-11-02 20:56:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:56,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-02 20:56:56,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:56,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602578161] [2022-11-02 20:56:56,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602578161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:56,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:56,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:56,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691588772] [2022-11-02 20:56:56,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:56,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:56:56,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:56,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:56:56,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:56:56,210 INFO L87 Difference]: Start difference. First operand 914 states and 1070 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:56,584 INFO L93 Difference]: Finished difference Result 2073 states and 2420 transitions. [2022-11-02 20:56:56,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:56:56,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 69 [2022-11-02 20:56:56,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:56,588 INFO L225 Difference]: With dead ends: 2073 [2022-11-02 20:56:56,588 INFO L226 Difference]: Without dead ends: 1290 [2022-11-02 20:56:56,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:56:56,590 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:56,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 55 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:56,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-11-02 20:56:56,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 975. [2022-11-02 20:56:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 1.162217659137577) internal successors, (1132), 974 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1132 transitions. [2022-11-02 20:56:56,860 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1132 transitions. Word has length 69 [2022-11-02 20:56:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:56,860 INFO L495 AbstractCegarLoop]: Abstraction has 975 states and 1132 transitions. [2022-11-02 20:56:56,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:56,861 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1132 transitions. [2022-11-02 20:56:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:56:56,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:56,863 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:56,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-02 20:56:56,863 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:56,864 INFO L85 PathProgramCache]: Analyzing trace with hash -533574500, now seen corresponding path program 1 times [2022-11-02 20:56:56,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:56,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281335988] [2022-11-02 20:56:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:56,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-02 20:56:56,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:56,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281335988] [2022-11-02 20:56:56,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281335988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:56,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:56,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016170175] [2022-11-02 20:56:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:56,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:56:56,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:56:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:56:56,902 INFO L87 Difference]: Start difference. First operand 975 states and 1132 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:57,087 INFO L93 Difference]: Finished difference Result 1259 states and 1467 transitions. [2022-11-02 20:56:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:56:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 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 69 [2022-11-02 20:56:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:57,089 INFO L225 Difference]: With dead ends: 1259 [2022-11-02 20:56:57,089 INFO L226 Difference]: Without dead ends: 619 [2022-11-02 20:56:57,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:56:57,092 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:57,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-11-02 20:56:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 515. [2022-11-02 20:56:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.1303501945525292) internal successors, (581), 514 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 581 transitions. [2022-11-02 20:56:57,248 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 581 transitions. Word has length 69 [2022-11-02 20:56:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:57,249 INFO L495 AbstractCegarLoop]: Abstraction has 515 states and 581 transitions. [2022-11-02 20:56:57,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 581 transitions. [2022-11-02 20:56:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:56:57,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:57,251 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:57,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-02 20:56:57,251 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1732806686, now seen corresponding path program 1 times [2022-11-02 20:56:57,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:57,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343267367] [2022-11-02 20:56:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:57,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-02 20:56:57,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:57,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343267367] [2022-11-02 20:56:57,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343267367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:57,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:57,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:57,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378919202] [2022-11-02 20:56:57,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:57,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:57,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:57,341 INFO L87 Difference]: Start difference. First operand 515 states and 581 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:57,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:57,525 INFO L93 Difference]: Finished difference Result 604 states and 676 transitions. [2022-11-02 20:56:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:57,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 69 [2022-11-02 20:56:57,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:57,527 INFO L225 Difference]: With dead ends: 604 [2022-11-02 20:56:57,527 INFO L226 Difference]: Without dead ends: 492 [2022-11-02 20:56:57,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:57,528 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:57,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 41 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-02 20:56:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 461. [2022-11-02 20:56:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.132608695652174) internal successors, (521), 460 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:57,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 521 transitions. [2022-11-02 20:56:57,670 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 521 transitions. Word has length 69 [2022-11-02 20:56:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:57,670 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 521 transitions. [2022-11-02 20:56:57,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:57,671 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 521 transitions. [2022-11-02 20:56:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:56:57,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:57,672 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:57,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-02 20:56:57,672 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:57,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1602936862, now seen corresponding path program 1 times [2022-11-02 20:56:57,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:57,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428472413] [2022-11-02 20:56:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:57,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:57,754 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-11-02 20:56:57,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:57,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428472413] [2022-11-02 20:56:57,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428472413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:57,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:57,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:57,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281928319] [2022-11-02 20:56:57,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:57,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:57,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:57,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:57,757 INFO L87 Difference]: Start difference. First operand 461 states and 521 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:57,899 INFO L93 Difference]: Finished difference Result 559 states and 630 transitions. [2022-11-02 20:56:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:57,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 69 [2022-11-02 20:56:57,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:57,901 INFO L225 Difference]: With dead ends: 559 [2022-11-02 20:56:57,901 INFO L226 Difference]: Without dead ends: 388 [2022-11-02 20:56:57,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:57,909 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:57,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-02 20:56:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 366. [2022-11-02 20:56:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.126027397260274) internal successors, (411), 365 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:58,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 411 transitions. [2022-11-02 20:56:58,026 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 411 transitions. Word has length 69 [2022-11-02 20:56:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:58,026 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 411 transitions. [2022-11-02 20:56:58,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 411 transitions. [2022-11-02 20:56:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-02 20:56:58,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:58,028 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:58,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-02 20:56:58,028 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:58,029 INFO L85 PathProgramCache]: Analyzing trace with hash 145563230, now seen corresponding path program 1 times [2022-11-02 20:56:58,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:58,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577930155] [2022-11-02 20:56:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:58,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:58,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:58,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577930155] [2022-11-02 20:56:58,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577930155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:58,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166720101] [2022-11-02 20:56:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:58,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:58,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:58,569 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:58,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:56:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:58,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:56:58,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:58,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:56:58,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:58,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:56:59,164 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:56:59,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-11-02 20:56:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:59,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:59,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:56:59,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:56:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:59,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166720101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:59,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:59,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-11-02 20:56:59,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440176026] [2022-11-02 20:56:59,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:59,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:56:59,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:56:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:56:59,348 INFO L87 Difference]: Start difference. First operand 366 states and 411 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:06,890 INFO L93 Difference]: Finished difference Result 1381 states and 1553 transitions. [2022-11-02 20:57:06,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2022-11-02 20:57:06,890 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-11-02 20:57:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:06,893 INFO L225 Difference]: With dead ends: 1381 [2022-11-02 20:57:06,894 INFO L226 Difference]: Without dead ends: 1379 [2022-11-02 20:57:06,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 124 SyntacticMatches, 8 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24623 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3868, Invalid=53492, Unknown=0, NotChecked=0, Total=57360 [2022-11-02 20:57:06,897 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 712 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 3377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:06,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 462 Invalid, 3377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 2840 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-02 20:57:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-11-02 20:57:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 330. [2022-11-02 20:57:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.1246200607902737) internal successors, (370), 329 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 370 transitions. [2022-11-02 20:57:07,031 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 370 transitions. Word has length 69 [2022-11-02 20:57:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:07,032 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 370 transitions. [2022-11-02 20:57:07,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 370 transitions. [2022-11-02 20:57:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-02 20:57:07,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:07,033 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:07,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:07,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:07,257 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:07,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:07,257 INFO L85 PathProgramCache]: Analyzing trace with hash -709817551, now seen corresponding path program 9 times [2022-11-02 20:57:07,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:07,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075713996] [2022-11-02 20:57:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:07,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:07,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:07,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075713996] [2022-11-02 20:57:07,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075713996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:07,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265387708] [2022-11-02 20:57:07,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:57:07,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:07,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:07,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:07,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:57:08,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-02 20:57:08,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:08,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 20:57:08,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:08,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:57:08,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-02 20:57:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:09,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:09,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-02 20:57:09,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 101 [2022-11-02 20:57:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:09,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265387708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:57:09,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:57:09,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2022-11-02 20:57:09,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345604463] [2022-11-02 20:57:09,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:09,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-02 20:57:09,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:09,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-02 20:57:09,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2075, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:57:09,804 INFO L87 Difference]: Start difference. First operand 330 states and 370 transitions. Second operand has 48 states, 48 states have (on average 4.458333333333333) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:24,208 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2022-11-02 20:57:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-11-02 20:57:24,209 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.458333333333333) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 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 75 [2022-11-02 20:57:24,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:24,213 INFO L225 Difference]: With dead ends: 869 [2022-11-02 20:57:24,213 INFO L226 Difference]: Without dead ends: 853 [2022-11-02 20:57:24,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13012 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=4224, Invalid=36378, Unknown=0, NotChecked=0, Total=40602 [2022-11-02 20:57:24,216 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1119 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 3463 mSolverCounterSat, 1034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 4497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1034 IncrementalHoareTripleChecker+Valid, 3463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:24,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1119 Valid, 858 Invalid, 4497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1034 Valid, 3463 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-02 20:57:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-11-02 20:57:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 370. [2022-11-02 20:57:24,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.1219512195121952) internal successors, (414), 369 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 414 transitions. [2022-11-02 20:57:24,360 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 414 transitions. Word has length 75 [2022-11-02 20:57:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:24,361 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 414 transitions. [2022-11-02 20:57:24,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.458333333333333) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:57:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 414 transitions. [2022-11-02 20:57:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-02 20:57:24,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:24,363 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:24,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:24,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-02 20:57:24,579 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2135196431, now seen corresponding path program 3 times [2022-11-02 20:57:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:24,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595666473] [2022-11-02 20:57:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:25,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595666473] [2022-11-02 20:57:25,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595666473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:25,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192484668] [2022-11-02 20:57:25,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:57:25,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:25,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:25,129 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:25,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:57:25,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:57:25,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:57:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-02 20:57:25,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:25,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:57:25,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:57:25,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:57:25,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:57:25,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-02 20:57:25,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:25,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:57:25,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:25,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:57:25,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:25,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:57:25,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:25,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:57:25,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:25,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-02 20:57:25,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:57:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-02 20:57:25,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:12,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2022-11-02 20:58:12,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2450 treesize of output 2418 [2022-11-02 20:58:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-11-02 20:58:41,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192484668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:41,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:41,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 32 [2022-11-02 20:58:41,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343048067] [2022-11-02 20:58:41,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:41,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:58:41,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:58:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=884, Unknown=16, NotChecked=0, Total=992 [2022-11-02 20:58:41,687 INFO L87 Difference]: Start difference. First operand 370 states and 414 transitions. Second operand has 32 states, 32 states have (on average 3.9375) internal successors, (126), 32 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:48,381 INFO L93 Difference]: Finished difference Result 876 states and 978 transitions. [2022-11-02 20:58:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-11-02 20:58:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.9375) internal successors, (126), 32 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-11-02 20:58:48,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:48,385 INFO L225 Difference]: With dead ends: 876 [2022-11-02 20:58:48,385 INFO L226 Difference]: Without dead ends: 788 [2022-11-02 20:58:48,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 218 SyntacticMatches, 8 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5821 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=2326, Invalid=15480, Unknown=16, NotChecked=0, Total=17822 [2022-11-02 20:58:48,388 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 570 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 2953 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 3892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 2953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:48,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 499 Invalid, 3892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 2953 Invalid, 0 Unknown, 334 Unchecked, 2.4s Time] [2022-11-02 20:58:48,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-11-02 20:58:48,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 376. [2022-11-02 20:58:48,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.1146666666666667) internal successors, (418), 375 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 418 transitions. [2022-11-02 20:58:48,490 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 418 transitions. Word has length 75 [2022-11-02 20:58:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:48,491 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 418 transitions. [2022-11-02 20:58:48,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.9375) internal successors, (126), 32 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:58:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 418 transitions. [2022-11-02 20:58:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-02 20:58:48,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:48,492 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:48,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:48,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-02 20:58:48,705 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:58:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:48,705 INFO L85 PathProgramCache]: Analyzing trace with hash 706101572, now seen corresponding path program 2 times [2022-11-02 20:58:48,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:48,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14252683] [2022-11-02 20:58:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:48,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:49,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:49,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14252683] [2022-11-02 20:58:49,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14252683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:49,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957527883] [2022-11-02 20:58:49,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:58:49,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:49,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:49,308 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:49,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60ca3ced-5beb-441c-b4dd-24c3b4bd30cb/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:58:49,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:58:49,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:58:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-02 20:58:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:49,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-02 20:58:50,002 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:58:50,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-11-02 20:58:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:50,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:50,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-11-02 20:58:50,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-02 20:58:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:50,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957527883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:58:50,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:58:50,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 28 [2022-11-02 20:58:50,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664446554] [2022-11-02 20:58:50,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:50,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:58:50,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:58:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:58:50,239 INFO L87 Difference]: Start difference. First operand 376 states and 418 transitions. Second operand has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)