./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 --- 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-2329fc7 [2022-12-13 20:29:46,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:29:46,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:29:46,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:29:46,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:29:46,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:29:46,126 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:29:46,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:29:46,128 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:29:46,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:29:46,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:29:46,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:29:46,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:29:46,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:29:46,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:29:46,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:29:46,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:29:46,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:29:46,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:29:46,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:29:46,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:29:46,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:29:46,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:29:46,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:29:46,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:29:46,141 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:29:46,141 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:29:46,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:29:46,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:29:46,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:29:46,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:29:46,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:29:46,143 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:29:46,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:29:46,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:29:46,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:29:46,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:29:46,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:29:46,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:29:46,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:29:46,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:29:46,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 20:29:46,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:29:46,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:29:46,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:29:46,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:29:46,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:29:46,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:29:46,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:29:46,163 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:29:46,163 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:29:46,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:29:46,163 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:29:46,163 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:29:46,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:29:46,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:29:46,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:29:46,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:29:46,165 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2022-12-13 20:29:46,339 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:29:46,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:29:46,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:29:46,360 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:29:46,360 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:29:46,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2022-12-13 20:29:48,993 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:29:49,179 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:29:49,179 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2022-12-13 20:29:49,186 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/data/28824d2bf/b06e0570fe554148a247283b9960a715/FLAG8ecfbe8db [2022-12-13 20:29:49,197 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/data/28824d2bf/b06e0570fe554148a247283b9960a715 [2022-12-13 20:29:49,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:29:49,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:29:49,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:29:49,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:29:49,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:29:49,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cd305b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49, skipping insertion in model container [2022-12-13 20:29:49,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:29:49,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:29:49,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:29:49,414 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:29:49,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:29:49,453 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:29:49,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49 WrapperNode [2022-12-13 20:29:49,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:29:49,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:29:49,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:29:49,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:29:49,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,481 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 90 [2022-12-13 20:29:49,482 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:29:49,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:29:49,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:29:49,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:29:49,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,495 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,498 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:29:49,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:29:49,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:29:49,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:29:49,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (1/1) ... [2022-12-13 20:29:49,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:29:49,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:49,527 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:29:49,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:29:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:29:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:29:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:29:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:29:49,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:29:49,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:29:49,636 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:29:49,638 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:29:49,802 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:29:49,806 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:29:49,807 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 20:29:49,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:29:49 BoogieIcfgContainer [2022-12-13 20:29:49,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:29:49,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:29:49,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:29:49,814 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:29:49,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:29:49" (1/3) ... [2022-12-13 20:29:49,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4064c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:29:49, skipping insertion in model container [2022-12-13 20:29:49,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:29:49" (2/3) ... [2022-12-13 20:29:49,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4064c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:29:49, skipping insertion in model container [2022-12-13 20:29:49,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:29:49" (3/3) ... [2022-12-13 20:29:49,817 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2022-12-13 20:29:49,833 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:29:49,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-12-13 20:29:49,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:29:49,872 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@3754d190, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:29:49,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-12-13 20:29:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 20:29:49,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:49,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:49,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:49,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-12-13 20:29:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:49,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595771788] [2022-12-13 20:29:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:49,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:50,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:50,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595771788] [2022-12-13 20:29:50,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595771788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:50,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:50,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:29:50,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494124839] [2022-12-13 20:29:50,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:50,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:29:50,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:29:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:29:50,174 INFO L87 Difference]: Start difference. First operand has 44 states, 30 states have (on average 1.8) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:50,221 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-12-13 20:29:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:29:50,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-12-13 20:29:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:50,229 INFO L225 Difference]: With dead ends: 42 [2022-12-13 20:29:50,230 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 20:29:50,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:29:50,234 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:50,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 20:29:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-13 20:29:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-12-13 20:29:50,258 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 7 [2022-12-13 20:29:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:50,259 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-12-13 20:29:50,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-12-13 20:29:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 20:29:50,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:50,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:50,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:29:50,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-12-13 20:29:50,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:50,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057414449] [2022-12-13 20:29:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:50,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:50,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:50,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057414449] [2022-12-13 20:29:50,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057414449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:50,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:50,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:29:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741533461] [2022-12-13 20:29:50,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:50,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:50,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:50,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:50,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:29:50,474 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:50,550 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-12-13 20:29:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:29:50,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-12-13 20:29:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:50,552 INFO L225 Difference]: With dead ends: 81 [2022-12-13 20:29:50,552 INFO L226 Difference]: Without dead ends: 81 [2022-12-13 20:29:50,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:29:50,553 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 46 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:50,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 163 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:29:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-13 20:29:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 44. [2022-12-13 20:29:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 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) [2022-12-13 20:29:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-12-13 20:29:50,560 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2022-12-13 20:29:50,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:50,561 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-12-13 20:29:50,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-12-13 20:29:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 20:29:50,562 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:50,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:50,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:29:50,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-12-13 20:29:50,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:50,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963894974] [2022-12-13 20:29:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:50,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:50,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:50,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963894974] [2022-12-13 20:29:50,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963894974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:50,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:50,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:29:50,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371345409] [2022-12-13 20:29:50,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:50,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:29:50,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:50,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:29:50,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:29:50,739 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:50,796 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-12-13 20:29:50,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:50,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2022-12-13 20:29:50,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:50,801 INFO L225 Difference]: With dead ends: 48 [2022-12-13 20:29:50,801 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 20:29:50,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:29:50,802 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:50,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 90 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:29:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 20:29:50,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-12-13 20:29:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:50,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-12-13 20:29:50,807 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2022-12-13 20:29:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:50,807 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-12-13 20:29:50,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-12-13 20:29:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 20:29:50,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:50,808 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:50,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 20:29:50,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:50,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:50,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2022-12-13 20:29:50,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:50,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182411803] [2022-12-13 20:29:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:50,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:50,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:50,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182411803] [2022-12-13 20:29:50,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182411803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:50,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377016441] [2022-12-13 20:29:50,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:50,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:50,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:50,861 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:29:50,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:29:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:50,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:29:50,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:50,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:50,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377016441] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:50,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:29:50,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-12-13 20:29:50,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999980904] [2022-12-13 20:29:50,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:50,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:50,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:50,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:50,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:50,984 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:51,010 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2022-12-13 20:29:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-12-13 20:29:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:51,011 INFO L225 Difference]: With dead ends: 79 [2022-12-13 20:29:51,011 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 20:29:51,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:51,012 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 69 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:51,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 113 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 20:29:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 49. [2022-12-13 20:29:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:51,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-12-13 20:29:51,015 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-12-13 20:29:51,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:51,016 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-12-13 20:29:51,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-12-13 20:29:51,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 20:29:51,016 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:51,016 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:51,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:29:51,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:51,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-12-13 20:29:51,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:51,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128391423] [2022-12-13 20:29:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:51,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128391423] [2022-12-13 20:29:51,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128391423] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055736577] [2022-12-13 20:29:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:51,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:51,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:51,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:29:51,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:29:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:29:51,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:51,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:29:51,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-12-13 20:29:51,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 20:29:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:51,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:29:51,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:29:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:29:51,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055736577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:29:51,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:29:51,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-12-13 20:29:51,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963369101] [2022-12-13 20:29:51,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:29:51,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 20:29:51,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:51,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 20:29:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:29:51,880 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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) [2022-12-13 20:29:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:52,025 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-12-13 20:29:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:29:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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 11 [2022-12-13 20:29:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:52,026 INFO L225 Difference]: With dead ends: 50 [2022-12-13 20:29:52,026 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 20:29:52,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:29:52,028 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 144 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:52,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 88 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:29:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 20:29:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-12-13 20:29:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-12-13 20:29:52,032 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 11 [2022-12-13 20:29:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:52,032 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-12-13 20:29:52,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 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) [2022-12-13 20:29:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-12-13 20:29:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:29:52,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:52,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:52,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:29:52,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:52,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:52,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:52,235 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265437, now seen corresponding path program 1 times [2022-12-13 20:29:52,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:52,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881085036] [2022-12-13 20:29:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:52,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:52,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881085036] [2022-12-13 20:29:52,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881085036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:52,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:52,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:29:52,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345260677] [2022-12-13 20:29:52,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:52,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:29:52,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:52,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:29:52,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:29:52,381 INFO L87 Difference]: Start difference. First operand 47 states and 54 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) [2022-12-13 20:29:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:52,409 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-12-13 20:29:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:29:52,410 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 [2022-12-13 20:29:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:52,410 INFO L225 Difference]: With dead ends: 53 [2022-12-13 20:29:52,410 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 20:29:52,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:29:52,411 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 38 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:52,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 73 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 20:29:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-12-13 20:29:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-12-13 20:29:52,413 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 13 [2022-12-13 20:29:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:52,414 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-12-13 20:29:52,414 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) [2022-12-13 20:29:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-12-13 20:29:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:29:52,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:52,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:52,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:29:52,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:52,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:52,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2022-12-13 20:29:52,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:52,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293355923] [2022-12-13 20:29:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:52,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:52,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:52,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293355923] [2022-12-13 20:29:52,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293355923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:52,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:52,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:29:52,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530854850] [2022-12-13 20:29:52,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:52,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:52,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:29:52,518 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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) [2022-12-13 20:29:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:52,575 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2022-12-13 20:29:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 [2022-12-13 20:29:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:52,576 INFO L225 Difference]: With dead ends: 87 [2022-12-13 20:29:52,576 INFO L226 Difference]: Without dead ends: 87 [2022-12-13 20:29:52,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:29:52,577 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 126 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:52,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 78 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-13 20:29:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 46. [2022-12-13 20:29:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.394736842105263) internal successors, (53), 45 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) [2022-12-13 20:29:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-12-13 20:29:52,581 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2022-12-13 20:29:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:52,581 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-12-13 20:29:52,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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) [2022-12-13 20:29:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-12-13 20:29:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:29:52,582 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:52,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:52,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 20:29:52,582 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:52,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:52,583 INFO L85 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2022-12-13 20:29:52,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:52,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55229944] [2022-12-13 20:29:52,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:52,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:52,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:52,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55229944] [2022-12-13 20:29:52,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55229944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:52,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:52,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:29:52,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481859522] [2022-12-13 20:29:52,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:52,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:29:52,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:52,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:29:52,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:29:52,715 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2022-12-13 20:29:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:52,768 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-12-13 20:29:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 [2022-12-13 20:29:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:52,769 INFO L225 Difference]: With dead ends: 89 [2022-12-13 20:29:52,769 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 20:29:52,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:29:52,770 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 63 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:52,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 114 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:52,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 20:29:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-12-13 20:29:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-12-13 20:29:52,774 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 13 [2022-12-13 20:29:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:52,775 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-12-13 20:29:52,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2022-12-13 20:29:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-12-13 20:29:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:29:52,775 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:52,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:52,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 20:29:52,776 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1811674902, now seen corresponding path program 1 times [2022-12-13 20:29:52,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:52,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224167004] [2022-12-13 20:29:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:52,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:52,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224167004] [2022-12-13 20:29:52,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224167004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:52,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:52,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:29:52,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875419019] [2022-12-13 20:29:52,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:52,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:29:52,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:52,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:29:52,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:52,907 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2022-12-13 20:29:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:52,965 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-12-13 20:29:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:29:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 [2022-12-13 20:29:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:52,966 INFO L225 Difference]: With dead ends: 72 [2022-12-13 20:29:52,966 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 20:29:52,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:29:52,967 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:52,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 76 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 20:29:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-12-13 20:29:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 67 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2022-12-13 20:29:52,971 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 13 [2022-12-13 20:29:52,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:52,971 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2022-12-13 20:29:52,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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) [2022-12-13 20:29:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2022-12-13 20:29:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:29:52,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:52,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:52,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 20:29:52,973 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:52,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:52,973 INFO L85 PathProgramCache]: Analyzing trace with hash -862198810, now seen corresponding path program 1 times [2022-12-13 20:29:52,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:52,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162677023] [2022-12-13 20:29:52,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:52,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:53,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:53,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162677023] [2022-12-13 20:29:53,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162677023] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:53,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136976691] [2022-12-13 20:29:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:53,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:53,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:53,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:29:53,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:29:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:53,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 20:29:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:53,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:29:53,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 20:29:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:53,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136976691] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:29:53,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:29:53,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-12-13 20:29:53,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829121959] [2022-12-13 20:29:53,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:29:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:29:53,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:29:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:29:53,298 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 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) [2022-12-13 20:29:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:53,396 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2022-12-13 20:29:53,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:29:53,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 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) Word has length 17 [2022-12-13 20:29:53,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:53,397 INFO L225 Difference]: With dead ends: 106 [2022-12-13 20:29:53,397 INFO L226 Difference]: Without dead ends: 106 [2022-12-13 20:29:53,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:29:53,398 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:53,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 163 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:29:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-13 20:29:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-12-13 20:29:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.3026315789473684) internal successors, (99), 83 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2022-12-13 20:29:53,403 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 17 [2022-12-13 20:29:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:53,403 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2022-12-13 20:29:53,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 10 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) [2022-12-13 20:29:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2022-12-13 20:29:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:29:53,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:53,404 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:53,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:29:53,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 20:29:53,605 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:53,605 INFO L85 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2022-12-13 20:29:53,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:53,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310535837] [2022-12-13 20:29:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:53,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:53,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:53,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310535837] [2022-12-13 20:29:53,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310535837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:53,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860495908] [2022-12-13 20:29:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:53,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:53,645 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:29:53,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:29:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:29:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:53,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:53,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860495908] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:53,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:29:53,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-12-13 20:29:53,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235061726] [2022-12-13 20:29:53,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:53,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:53,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:53,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:53,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:53,719 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:53,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:53,734 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-12-13 20:29:53,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:53,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-12-13 20:29:53,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:53,735 INFO L225 Difference]: With dead ends: 101 [2022-12-13 20:29:53,735 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 20:29:53,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:53,736 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 48 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 83 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 [2022-12-13 20:29:53,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 83 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 20:29:53,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 82. [2022-12-13 20:29:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 81 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2022-12-13 20:29:53,740 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 17 [2022-12-13 20:29:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:53,740 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2022-12-13 20:29:53,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:53,740 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2022-12-13 20:29:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:29:53,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:53,741 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:53,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 20:29:53,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:53,942 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:53,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2022-12-13 20:29:53,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:53,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535753535] [2022-12-13 20:29:53,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:53,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:54,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:54,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535753535] [2022-12-13 20:29:54,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535753535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:54,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116918927] [2022-12-13 20:29:54,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:54,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:54,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:54,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:29:54,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 20:29:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:54,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 20:29:54,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:54,204 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 20:29:54,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-13 20:29:54,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:54,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:29:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:54,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116918927] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:29:54,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:29:54,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-13 20:29:54,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438411786] [2022-12-13 20:29:54,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:29:54,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 20:29:54,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:54,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 20:29:54,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:29:54,619 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:54,796 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-12-13 20:29:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:29:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 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 17 [2022-12-13 20:29:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:54,797 INFO L225 Difference]: With dead ends: 85 [2022-12-13 20:29:54,797 INFO L226 Difference]: Without dead ends: 85 [2022-12-13 20:29:54,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:29:54,798 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 133 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:54,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 131 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:29:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-13 20:29:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-12-13 20:29:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 78 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2022-12-13 20:29:54,801 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 17 [2022-12-13 20:29:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:54,801 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2022-12-13 20:29:54,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2022-12-13 20:29:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:29:54,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:54,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:54,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 20:29:55,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:55,003 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:55,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:55,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2142062488, now seen corresponding path program 1 times [2022-12-13 20:29:55,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:55,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547480315] [2022-12-13 20:29:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:55,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:55,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547480315] [2022-12-13 20:29:55,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547480315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:55,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:55,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:29:55,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646108467] [2022-12-13 20:29:55,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:55,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:29:55,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:29:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:55,182 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:55,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:55,220 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2022-12-13 20:29:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:29:55,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-12-13 20:29:55,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:55,221 INFO L225 Difference]: With dead ends: 78 [2022-12-13 20:29:55,221 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 20:29:55,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:29:55,222 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 101 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:55,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 20:29:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-12-13 20:29:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-12-13 20:29:55,224 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 17 [2022-12-13 20:29:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:55,224 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-12-13 20:29:55,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-12-13 20:29:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 20:29:55,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:55,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:55,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 20:29:55,224 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2056744278, now seen corresponding path program 1 times [2022-12-13 20:29:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:55,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651008421] [2022-12-13 20:29:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:55,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:55,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:55,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651008421] [2022-12-13 20:29:55,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651008421] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:55,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:55,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:29:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526640379] [2022-12-13 20:29:55,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:55,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:29:55,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:29:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:55,296 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:55,338 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2022-12-13 20:29:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:29:55,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 20:29:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:55,338 INFO L225 Difference]: With dead ends: 64 [2022-12-13 20:29:55,338 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 20:29:55,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:29:55,339 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 45 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:55,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 69 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 20:29:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2022-12-13 20:29:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-12-13 20:29:55,341 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 18 [2022-12-13 20:29:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:55,341 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-12-13 20:29:55,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-12-13 20:29:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 20:29:55,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:55,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:55,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 20:29:55,342 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:55,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:55,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1835484247, now seen corresponding path program 1 times [2022-12-13 20:29:55,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:55,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650430140] [2022-12-13 20:29:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:55,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:55,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:55,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650430140] [2022-12-13 20:29:55,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650430140] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:55,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:55,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:29:55,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75724948] [2022-12-13 20:29:55,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:55,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:29:55,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:55,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:29:55,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:29:55,396 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:55,429 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-12-13 20:29:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:29:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 20:29:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:55,430 INFO L225 Difference]: With dead ends: 60 [2022-12-13 20:29:55,430 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 20:29:55,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:29:55,431 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:55,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 64 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 20:29:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-13 20:29:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 59 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) [2022-12-13 20:29:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-12-13 20:29:55,433 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 21 [2022-12-13 20:29:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:55,434 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-12-13 20:29:55,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-12-13 20:29:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 20:29:55,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:55,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:55,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 20:29:55,435 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:55,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:55,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1835484246, now seen corresponding path program 1 times [2022-12-13 20:29:55,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:55,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676924399] [2022-12-13 20:29:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:55,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:55,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:55,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676924399] [2022-12-13 20:29:55,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676924399] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:55,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795658247] [2022-12-13 20:29:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:55,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:55,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:55,558 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:29:55,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 20:29:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 20:29:55,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:55,651 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 20:29:55,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-12-13 20:29:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:55,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:29:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:55,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795658247] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:55,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:29:55,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6, 8] total 20 [2022-12-13 20:29:55,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392840807] [2022-12-13 20:29:55,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:55,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:29:55,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:55,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:29:55,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:29:55,953 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:56,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:56,056 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-12-13 20:29:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:29:56,056 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 20:29:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:56,057 INFO L225 Difference]: With dead ends: 93 [2022-12-13 20:29:56,057 INFO L226 Difference]: Without dead ends: 93 [2022-12-13 20:29:56,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:29:56,058 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 104 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:56,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 182 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:29:56,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-13 20:29:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2022-12-13 20:29:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.178082191780822) internal successors, (86), 76 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) [2022-12-13 20:29:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-12-13 20:29:56,060 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 21 [2022-12-13 20:29:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:56,061 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-12-13 20:29:56,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-12-13 20:29:56,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 20:29:56,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:56,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:56,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 20:29:56,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:56,264 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:56,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:56,265 INFO L85 PathProgramCache]: Analyzing trace with hash 770539308, now seen corresponding path program 1 times [2022-12-13 20:29:56,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:56,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844690894] [2022-12-13 20:29:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:56,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:56,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844690894] [2022-12-13 20:29:56,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844690894] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123884321] [2022-12-13 20:29:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:56,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:56,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:56,470 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:29:56,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 20:29:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:56,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 20:29:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:56,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:29:56,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-13 20:29:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:56,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123884321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:29:56,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:29:56,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-12-13 20:29:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20909210] [2022-12-13 20:29:56,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:29:56,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:29:56,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:29:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:29:56,667 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:56,755 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2022-12-13 20:29:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:29:56,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 20:29:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:56,756 INFO L225 Difference]: With dead ends: 87 [2022-12-13 20:29:56,756 INFO L226 Difference]: Without dead ends: 87 [2022-12-13 20:29:56,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-13 20:29:56,757 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 91 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:56,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 153 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-13 20:29:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2022-12-13 20:29:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.206896551724138) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:56,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-12-13 20:29:56,760 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 21 [2022-12-13 20:29:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:56,760 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-12-13 20:29:56,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-12-13 20:29:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 20:29:56,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:56,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:56,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 20:29:56,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 20:29:56,962 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:56,962 INFO L85 PathProgramCache]: Analyzing trace with hash -618546161, now seen corresponding path program 1 times [2022-12-13 20:29:56,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:56,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327177247] [2022-12-13 20:29:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:56,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:57,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327177247] [2022-12-13 20:29:57,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327177247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:57,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:57,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:29:57,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775460775] [2022-12-13 20:29:57,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:57,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:29:57,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:57,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:29:57,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:29:57,014 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:57,065 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-12-13 20:29:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:29:57,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-12-13 20:29:57,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:57,066 INFO L225 Difference]: With dead ends: 65 [2022-12-13 20:29:57,066 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 20:29:57,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:29:57,067 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 51 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:57,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 89 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 20:29:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2022-12-13 20:29:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-12-13 20:29:57,070 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 25 [2022-12-13 20:29:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:57,070 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-12-13 20:29:57,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-12-13 20:29:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 20:29:57,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:57,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:57,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 20:29:57,071 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:57,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:57,071 INFO L85 PathProgramCache]: Analyzing trace with hash -618546160, now seen corresponding path program 1 times [2022-12-13 20:29:57,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:57,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693001190] [2022-12-13 20:29:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:57,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:57,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:57,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693001190] [2022-12-13 20:29:57,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693001190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:57,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927025667] [2022-12-13 20:29:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:57,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:57,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:57,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:29:57,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 20:29:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:57,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 20:29:57,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:57,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:29:57,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-13 20:29:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:57,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927025667] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:29:57,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:29:57,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-12-13 20:29:57,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007677970] [2022-12-13 20:29:57,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:29:57,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 20:29:57,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 20:29:57,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-12-13 20:29:57,401 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:57,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:57,542 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-12-13 20:29:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:29:57,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 20:29:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:57,543 INFO L225 Difference]: With dead ends: 68 [2022-12-13 20:29:57,543 INFO L226 Difference]: Without dead ends: 68 [2022-12-13 20:29:57,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:29:57,544 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:57,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 163 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:29:57,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-12-13 20:29:57,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-12-13 20:29:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-12-13 20:29:57,546 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 25 [2022-12-13 20:29:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:57,547 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-12-13 20:29:57,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-12-13 20:29:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 20:29:57,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:57,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:57,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 20:29:57,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:57,748 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:57,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1995099464, now seen corresponding path program 1 times [2022-12-13 20:29:57,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:57,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137184735] [2022-12-13 20:29:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:57,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:29:57,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:57,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137184735] [2022-12-13 20:29:57,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137184735] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:57,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:57,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:29:57,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400142978] [2022-12-13 20:29:57,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:29:57,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:57,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:29:57,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:29:57,874 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:57,890 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-12-13 20:29:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:29:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-12-13 20:29:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:57,891 INFO L225 Difference]: With dead ends: 62 [2022-12-13 20:29:57,891 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 20:29:57,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:29:57,892 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:57,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:29:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 20:29:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-13 20:29:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-12-13 20:29:57,895 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 26 [2022-12-13 20:29:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:57,895 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-12-13 20:29:57,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-12-13 20:29:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 20:29:57,895 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:57,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:57,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 20:29:57,896 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1127339532, now seen corresponding path program 1 times [2022-12-13 20:29:57,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:57,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482646815] [2022-12-13 20:29:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:57,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:29:58,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482646815] [2022-12-13 20:29:58,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482646815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:29:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732179878] [2022-12-13 20:29:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:29:58,179 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:29:58,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 20:29:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 20:29:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:29:58,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:29:58,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:29:58,399 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-12-13 20:29:58,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-12-13 20:29:58,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:29:58,521 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:29:58,521 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 10 [2022-12-13 20:29:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:29:58,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:29:58,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732179878] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:58,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:29:58,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 22 [2022-12-13 20:29:58,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344949628] [2022-12-13 20:29:58,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:58,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:29:58,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:58,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:29:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-12-13 20:29:58,547 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2022-12-13 20:29:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:58,741 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-12-13 20:29:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:29:58,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) Word has length 29 [2022-12-13 20:29:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:58,741 INFO L225 Difference]: With dead ends: 96 [2022-12-13 20:29:58,741 INFO L226 Difference]: Without dead ends: 77 [2022-12-13 20:29:58,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-12-13 20:29:58,743 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:58,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 179 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:29:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-13 20:29:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-12-13 20:29:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-12-13 20:29:58,745 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 29 [2022-12-13 20:29:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:58,745 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-12-13 20:29:58,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) [2022-12-13 20:29:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-12-13 20:29:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 20:29:58,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:58,746 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:58,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 20:29:58,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:29:58,947 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1065299918, now seen corresponding path program 1 times [2022-12-13 20:29:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:58,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891654008] [2022-12-13 20:29:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:58,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:29:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:29:59,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:29:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891654008] [2022-12-13 20:29:59,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891654008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:29:59,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:29:59,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 20:29:59,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427344559] [2022-12-13 20:29:59,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:29:59,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 20:29:59,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:29:59,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 20:29:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:29:59,255 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2022-12-13 20:29:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:29:59,848 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-12-13 20:29:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 20:29:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) Word has length 29 [2022-12-13 20:29:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:29:59,848 INFO L225 Difference]: With dead ends: 95 [2022-12-13 20:29:59,848 INFO L226 Difference]: Without dead ends: 95 [2022-12-13 20:29:59,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-12-13 20:29:59,849 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 142 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:29:59,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 264 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:29:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-13 20:29:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2022-12-13 20:29:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 69 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:29:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-12-13 20:29:59,851 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 29 [2022-12-13 20:29:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:29:59,851 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-12-13 20:29:59,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2022-12-13 20:29:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-12-13 20:29:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 20:29:59,852 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:29:59,852 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:29:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 20:29:59,852 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:29:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:29:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 795888502, now seen corresponding path program 1 times [2022-12-13 20:29:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:29:59,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973020330] [2022-12-13 20:29:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:29:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:29:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:00,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:00,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973020330] [2022-12-13 20:30:00,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973020330] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:00,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413162708] [2022-12-13 20:30:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:00,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:00,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:00,169 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:00,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 20:30:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:00,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 20:30:00,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:00,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:30:00,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:30:00,438 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-12-13 20:30:00,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-12-13 20:30:00,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:30:00,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:30:00,538 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 10 [2022-12-13 20:30:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:00,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:00,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-13 20:30:00,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 20:30:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:00,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413162708] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:00,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:00,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 31 [2022-12-13 20:30:00,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723775894] [2022-12-13 20:30:00,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:00,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 20:30:00,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:00,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 20:30:00,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-12-13 20:30:00,730 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:01,460 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2022-12-13 20:30:01,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 20:30:01,460 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 20:30:01,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:01,461 INFO L225 Difference]: With dead ends: 126 [2022-12-13 20:30:01,461 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 20:30:01,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=2011, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 20:30:01,462 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 191 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:01,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 533 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:30:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 20:30:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2022-12-13 20:30:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-12-13 20:30:01,465 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 29 [2022-12-13 20:30:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:01,465 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-12-13 20:30:01,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-12-13 20:30:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 20:30:01,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:01,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:01,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 20:30:01,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 20:30:01,667 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:01,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1769750649, now seen corresponding path program 2 times [2022-12-13 20:30:01,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:01,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878706234] [2022-12-13 20:30:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:01,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:01,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:01,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:01,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878706234] [2022-12-13 20:30:01,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878706234] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:01,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72115588] [2022-12-13 20:30:01,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:30:01,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:01,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:01,833 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:01,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 20:30:01,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:30:01,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:01,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 20:30:01,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:02,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:02,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 20:30:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:02,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72115588] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:02,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:02,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-12-13 20:30:02,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724633032] [2022-12-13 20:30:02,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:02,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 20:30:02,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:02,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 20:30:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:30:02,131 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 20 states, 19 states have (on average 3.526315789473684) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:02,271 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-12-13 20:30:02,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:30:02,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.526315789473684) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 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 [2022-12-13 20:30:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:02,272 INFO L225 Difference]: With dead ends: 70 [2022-12-13 20:30:02,272 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 20:30:02,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2022-12-13 20:30:02,273 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 166 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:02,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 195 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:30:02,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 20:30:02,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-12-13 20:30:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-12-13 20:30:02,275 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 33 [2022-12-13 20:30:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:02,275 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-12-13 20:30:02,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.526315789473684) internal successors, (67), 20 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-12-13 20:30:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 20:30:02,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:02,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:02,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 20:30:02,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 20:30:02,477 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:02,478 INFO L85 PathProgramCache]: Analyzing trace with hash -972218812, now seen corresponding path program 1 times [2022-12-13 20:30:02,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:02,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697402646] [2022-12-13 20:30:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:02,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:02,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:02,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697402646] [2022-12-13 20:30:02,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697402646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:02,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603278591] [2022-12-13 20:30:02,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:02,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:02,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:02,751 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:02,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 20:30:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:02,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 20:30:02,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:02,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:30:03,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:30:03,001 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 17 [2022-12-13 20:30:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:03,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:03,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:30:03,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 20:30:03,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-12-13 20:30:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:03,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603278591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:03,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:03,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-12-13 20:30:03,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339970646] [2022-12-13 20:30:03,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:03,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 20:30:03,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:03,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 20:30:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 20:30:03,546 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:04,234 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-12-13 20:30:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 20:30:04,234 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-13 20:30:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:04,235 INFO L225 Difference]: With dead ends: 88 [2022-12-13 20:30:04,235 INFO L226 Difference]: Without dead ends: 88 [2022-12-13 20:30:04,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 20:30:04,236 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 113 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:04,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 538 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:30:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-13 20:30:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-12-13 20:30:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.119047619047619) internal successors, (94), 85 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:04,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2022-12-13 20:30:04,238 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 34 [2022-12-13 20:30:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:04,238 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2022-12-13 20:30:04,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2022-12-13 20:30:04,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 20:30:04,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:04,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:04,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 20:30:04,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:04,441 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash -270618938, now seen corresponding path program 1 times [2022-12-13 20:30:04,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:04,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121085004] [2022-12-13 20:30:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:04,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:04,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:04,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121085004] [2022-12-13 20:30:04,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121085004] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:04,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635946769] [2022-12-13 20:30:04,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:04,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:04,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:04,643 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:04,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 20:30:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:04,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 20:30:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:04,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:30:04,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:30:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:04,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:04,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-13 20:30:04,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 20:30:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:04,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635946769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:04,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:04,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 20 [2022-12-13 20:30:04,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888643533] [2022-12-13 20:30:04,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:04,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 20:30:04,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:04,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 20:30:04,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:30:04,902 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2022-12-13 20:30:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:05,170 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-12-13 20:30:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:30:05,170 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-13 20:30:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:05,170 INFO L225 Difference]: With dead ends: 116 [2022-12-13 20:30:05,170 INFO L226 Difference]: Without dead ends: 116 [2022-12-13 20:30:05,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 20:30:05,171 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 143 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:05,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 287 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:30:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-13 20:30:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 90. [2022-12-13 20:30:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.125) internal successors, (99), 89 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-12-13 20:30:05,173 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 34 [2022-12-13 20:30:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:05,173 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-12-13 20:30:05,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 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) [2022-12-13 20:30:05,173 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-12-13 20:30:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 20:30:05,173 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:05,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:05,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 20:30:05,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:05,375 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:05,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1855891613, now seen corresponding path program 2 times [2022-12-13 20:30:05,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:05,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665214813] [2022-12-13 20:30:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:05,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:05,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:05,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665214813] [2022-12-13 20:30:05,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665214813] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:05,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344246348] [2022-12-13 20:30:05,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:30:05,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:05,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:05,621 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:05,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 20:30:05,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:30:05,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:05,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 20:30:05,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:05,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:05,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 20:30:05,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:05,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344246348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:05,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:05,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2022-12-13 20:30:05,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359130789] [2022-12-13 20:30:05,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:05,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 20:30:05,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:05,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 20:30:05,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-12-13 20:30:05,963 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:06,341 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2022-12-13 20:30:06,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:30:06,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 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 [2022-12-13 20:30:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:06,342 INFO L225 Difference]: With dead ends: 113 [2022-12-13 20:30:06,342 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 20:30:06,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 20:30:06,343 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 159 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:06,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 284 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:30:06,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 20:30:06,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2022-12-13 20:30:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 99 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) [2022-12-13 20:30:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2022-12-13 20:30:06,345 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 38 [2022-12-13 20:30:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:06,345 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2022-12-13 20:30:06,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.0) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2022-12-13 20:30:06,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 20:30:06,346 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:06,346 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:06,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 20:30:06,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 20:30:06,547 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash 759394243, now seen corresponding path program 3 times [2022-12-13 20:30:06,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:06,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371394524] [2022-12-13 20:30:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:06,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:06,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371394524] [2022-12-13 20:30:06,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371394524] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:06,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678871424] [2022-12-13 20:30:06,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:30:06,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:06,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:06,906 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:06,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 20:30:07,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 20:30:07,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:07,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 20:30:07,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:07,065 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:30:07,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:30:07,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:30:07,251 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:30:07,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-12-13 20:30:07,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-12-13 20:30:07,665 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 20:30:07,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2022-12-13 20:30:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:07,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:08,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:30:08,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 20:30:08,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:30:08,511 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 36 [2022-12-13 20:30:08,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:30:08,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 22 [2022-12-13 20:30:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:09,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678871424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:09,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:09,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 20] total 46 [2022-12-13 20:30:09,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278886063] [2022-12-13 20:30:09,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:09,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 20:30:09,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:09,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 20:30:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1927, Unknown=1, NotChecked=0, Total=2070 [2022-12-13 20:30:09,318 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 46 states, 46 states have (on average 2.369565217391304) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:11,065 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2022-12-13 20:30:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 20:30:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.369565217391304) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 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 41 [2022-12-13 20:30:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:11,066 INFO L225 Difference]: With dead ends: 206 [2022-12-13 20:30:11,066 INFO L226 Difference]: Without dead ends: 166 [2022-12-13 20:30:11,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=601, Invalid=4654, Unknown=1, NotChecked=0, Total=5256 [2022-12-13 20:30:11,067 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 317 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:11,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 562 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:30:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-12-13 20:30:11,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2022-12-13 20:30:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 136 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-12-13 20:30:11,070 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 41 [2022-12-13 20:30:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:11,071 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-12-13 20:30:11,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.369565217391304) internal successors, (109), 46 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-12-13 20:30:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 20:30:11,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:11,071 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:11,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 20:30:11,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 20:30:11,273 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:11,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:11,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1122231478, now seen corresponding path program 3 times [2022-12-13 20:30:11,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:11,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818491815] [2022-12-13 20:30:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:11,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:11,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:11,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818491815] [2022-12-13 20:30:11,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818491815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:11,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224149158] [2022-12-13 20:30:11,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:30:11,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:11,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:11,556 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:11,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 20:30:11,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 20:30:11,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 20:30:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:11,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:30:11,914 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 20:30:11,914 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 10 [2022-12-13 20:30:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:11,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:12,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:30:12,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:30:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:12,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224149158] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:12,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:12,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 33 [2022-12-13 20:30:12,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852510300] [2022-12-13 20:30:12,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:12,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 20:30:12,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 20:30:12,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 20:30:12,132 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:12,839 INFO L93 Difference]: Finished difference Result 207 states and 223 transitions. [2022-12-13 20:30:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 20:30:12,839 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 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 43 [2022-12-13 20:30:12,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:12,840 INFO L225 Difference]: With dead ends: 207 [2022-12-13 20:30:12,840 INFO L226 Difference]: Without dead ends: 191 [2022-12-13 20:30:12,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 20:30:12,841 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 252 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:12,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 561 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:30:12,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-13 20:30:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 176. [2022-12-13 20:30:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 1.1149425287356323) internal successors, (194), 175 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) [2022-12-13 20:30:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 194 transitions. [2022-12-13 20:30:12,843 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 194 transitions. Word has length 43 [2022-12-13 20:30:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:12,844 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 194 transitions. [2022-12-13 20:30:12,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 194 transitions. [2022-12-13 20:30:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 20:30:12,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:12,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:12,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 20:30:13,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 20:30:13,046 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:13,047 INFO L85 PathProgramCache]: Analyzing trace with hash -544147386, now seen corresponding path program 4 times [2022-12-13 20:30:13,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:13,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578111085] [2022-12-13 20:30:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:13,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:30:13,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:13,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578111085] [2022-12-13 20:30:13,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578111085] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:13,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955724011] [2022-12-13 20:30:13,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:30:13,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:13,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:13,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:13,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 20:30:13,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:30:13,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:13,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 20:30:13,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:13,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:30:13,428 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-13 20:30:13,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 20:30:13,839 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-12-13 20:30:13,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-12-13 20:30:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:30:13,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:14,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-12-13 20:30:14,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-12-13 20:30:14,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 20:30:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:30:14,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955724011] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:14,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:14,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 16] total 37 [2022-12-13 20:30:14,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349449307] [2022-12-13 20:30:14,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:14,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 20:30:14,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 20:30:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 20:30:14,728 INFO L87 Difference]: Start difference. First operand 176 states and 194 transitions. Second operand has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 38 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) [2022-12-13 20:30:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:19,167 INFO L93 Difference]: Finished difference Result 185 states and 199 transitions. [2022-12-13 20:30:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 20:30:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 38 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 45 [2022-12-13 20:30:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:19,168 INFO L225 Difference]: With dead ends: 185 [2022-12-13 20:30:19,168 INFO L226 Difference]: Without dead ends: 108 [2022-12-13 20:30:19,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=830, Invalid=3460, Unknown=0, NotChecked=0, Total=4290 [2022-12-13 20:30:19,169 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 243 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:19,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 466 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:30:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-13 20:30:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2022-12-13 20:30:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:19,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-12-13 20:30:19,170 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 45 [2022-12-13 20:30:19,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:19,171 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-12-13 20:30:19,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.918918918918919) internal successors, (108), 38 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) [2022-12-13 20:30:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-12-13 20:30:19,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 20:30:19,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:19,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:19,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 20:30:19,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:19,372 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:19,373 INFO L85 PathProgramCache]: Analyzing trace with hash 921214137, now seen corresponding path program 4 times [2022-12-13 20:30:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:19,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611840554] [2022-12-13 20:30:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:19,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:19,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611840554] [2022-12-13 20:30:19,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611840554] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141408381] [2022-12-13 20:30:19,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:30:19,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:19,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:19,605 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:19,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 20:30:19,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:30:19,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:19,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 20:30:19,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:19,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:19,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 20:30:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:19,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141408381] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:19,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:19,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-12-13 20:30:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701594983] [2022-12-13 20:30:19,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 20:30:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 20:30:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-12-13 20:30:19,924 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 27 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:20,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:20,242 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-12-13 20:30:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 20:30:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 27 states have internal predecessors, (95), 0 states have call successors, (0), 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 47 [2022-12-13 20:30:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:20,243 INFO L225 Difference]: With dead ends: 109 [2022-12-13 20:30:20,243 INFO L226 Difference]: Without dead ends: 109 [2022-12-13 20:30:20,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 20:30:20,244 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 208 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:20,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 284 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:30:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-13 20:30:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2022-12-13 20:30:20,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0957446808510638) internal successors, (103), 94 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2022-12-13 20:30:20,246 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 47 [2022-12-13 20:30:20,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:20,246 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2022-12-13 20:30:20,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 27 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2022-12-13 20:30:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 20:30:20,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:20,246 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:20,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 20:30:20,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 20:30:20,447 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1256228128, now seen corresponding path program 5 times [2022-12-13 20:30:20,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:20,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527678767] [2022-12-13 20:30:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:20,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:30:22,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:22,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527678767] [2022-12-13 20:30:22,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527678767] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:22,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791061269] [2022-12-13 20:30:22,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:30:22,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:22,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:22,162 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:22,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 20:30:22,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 20:30:22,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:22,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 20:30:22,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:22,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:30:22,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:30:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:22,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:22,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:30:22,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:30:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:22,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791061269] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:22,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:22,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 16, 16] total 43 [2022-12-13 20:30:22,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812413230] [2022-12-13 20:30:22,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:22,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 20:30:22,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:22,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 20:30:22,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1693, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:30:22,862 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 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) [2022-12-13 20:30:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:26,698 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2022-12-13 20:30:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 20:30:26,699 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 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 52 [2022-12-13 20:30:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:26,699 INFO L225 Difference]: With dead ends: 177 [2022-12-13 20:30:26,699 INFO L226 Difference]: Without dead ends: 120 [2022-12-13 20:30:26,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=771, Invalid=5549, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 20:30:26,700 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 423 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:26,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 717 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 20:30:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-13 20:30:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2022-12-13 20:30:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.088235294117647) internal successors, (111), 102 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) [2022-12-13 20:30:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-12-13 20:30:26,702 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 52 [2022-12-13 20:30:26,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:26,702 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-12-13 20:30:26,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 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) [2022-12-13 20:30:26,702 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-12-13 20:30:26,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 20:30:26,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:26,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:26,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 20:30:26,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:26,903 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:26,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:26,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1099374717, now seen corresponding path program 6 times [2022-12-13 20:30:26,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:26,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762148158] [2022-12-13 20:30:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:26,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:27,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:27,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762148158] [2022-12-13 20:30:27,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762148158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:27,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129732203] [2022-12-13 20:30:27,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:30:27,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:27,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:27,172 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:27,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 20:30:27,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 20:30:27,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 20:30:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:27,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:27,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 20:30:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:27,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129732203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:27,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:27,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-12-13 20:30:27,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758918364] [2022-12-13 20:30:27,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:27,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 20:30:27,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:27,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 20:30:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 20:30:27,787 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 35 states, 34 states have (on average 3.764705882352941) internal successors, (128), 35 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:28,128 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2022-12-13 20:30:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 20:30:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.764705882352941) internal successors, (128), 35 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-13 20:30:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:28,130 INFO L225 Difference]: With dead ends: 131 [2022-12-13 20:30:28,130 INFO L226 Difference]: Without dead ends: 131 [2022-12-13 20:30:28,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=1665, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 20:30:28,130 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 236 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:28,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 451 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:30:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-12-13 20:30:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2022-12-13 20:30:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0892857142857142) internal successors, (122), 112 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) [2022-12-13 20:30:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2022-12-13 20:30:28,133 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 56 [2022-12-13 20:30:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:28,133 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2022-12-13 20:30:28,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.764705882352941) internal successors, (128), 35 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2022-12-13 20:30:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-13 20:30:28,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:28,134 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:28,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 20:30:28,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 20:30:28,335 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:28,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash 206683100, now seen corresponding path program 7 times [2022-12-13 20:30:28,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:28,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776143815] [2022-12-13 20:30:28,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:28,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:28,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:28,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776143815] [2022-12-13 20:30:28,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776143815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:28,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763619766] [2022-12-13 20:30:28,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:30:28,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:28,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:28,743 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:28,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 20:30:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:28,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 20:30:28,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:28,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:30:29,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:30:29,234 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 11 [2022-12-13 20:30:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:29,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:29,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-12-13 20:30:29,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:30:29,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 23 [2022-12-13 20:30:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:29,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763619766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:29,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:29,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 50 [2022-12-13 20:30:29,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60180902] [2022-12-13 20:30:29,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:29,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 20:30:29,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 20:30:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 20:30:29,719 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand has 50 states, 50 states have (on average 2.72) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:30,895 INFO L93 Difference]: Finished difference Result 205 states and 218 transitions. [2022-12-13 20:30:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 20:30:30,896 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-13 20:30:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:30,896 INFO L225 Difference]: With dead ends: 205 [2022-12-13 20:30:30,896 INFO L226 Difference]: Without dead ends: 134 [2022-12-13 20:30:30,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=768, Invalid=5084, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 20:30:30,897 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 329 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:30,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 682 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:30:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-13 20:30:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2022-12-13 20:30:30,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0833333333333333) internal successors, (130), 120 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2022-12-13 20:30:30,899 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 61 [2022-12-13 20:30:30,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:30,899 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2022-12-13 20:30:30,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.72) internal successors, (136), 50 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:30,899 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2022-12-13 20:30:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 20:30:30,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:30,900 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:30,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 20:30:31,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:31,101 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:31,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1721211167, now seen corresponding path program 8 times [2022-12-13 20:30:31,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:31,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25487928] [2022-12-13 20:30:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:31,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:31,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:31,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25487928] [2022-12-13 20:30:31,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25487928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:31,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994137652] [2022-12-13 20:30:31,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:30:31,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:31,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:31,530 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:31,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 20:30:31,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:30:31,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:31,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 20:30:31,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:31,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:32,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 20:30:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:32,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994137652] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:32,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:32,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-12-13 20:30:32,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268504392] [2022-12-13 20:30:32,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:32,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 20:30:32,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:32,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 20:30:32,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 20:30:32,130 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 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) [2022-12-13 20:30:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:32,780 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2022-12-13 20:30:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 20:30:32,780 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 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 65 [2022-12-13 20:30:32,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:32,780 INFO L225 Difference]: With dead ends: 153 [2022-12-13 20:30:32,781 INFO L226 Difference]: Without dead ends: 153 [2022-12-13 20:30:32,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 104 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=507, Invalid=2043, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 20:30:32,781 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 443 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:32,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 554 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:30:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-13 20:30:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2022-12-13 20:30:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0846153846153845) internal successors, (141), 130 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 141 transitions. [2022-12-13 20:30:32,783 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 141 transitions. Word has length 65 [2022-12-13 20:30:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:32,784 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 141 transitions. [2022-12-13 20:30:32,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.5) internal successors, (126), 37 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) [2022-12-13 20:30:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 141 transitions. [2022-12-13 20:30:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 20:30:32,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:32,784 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:32,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-13 20:30:32,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 20:30:32,985 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:32,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1799182458, now seen corresponding path program 9 times [2022-12-13 20:30:32,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890466108] [2022-12-13 20:30:32,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:32,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:33,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:33,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890466108] [2022-12-13 20:30:33,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890466108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:33,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166364498] [2022-12-13 20:30:33,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:30:33,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:33,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:33,438 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:33,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 20:30:33,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 20:30:33,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:33,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-13 20:30:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:33,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:30:33,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:30:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:33,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:33,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:30:33,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:30:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:34,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166364498] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:34,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:34,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 38 [2022-12-13 20:30:34,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322049392] [2022-12-13 20:30:34,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:34,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 20:30:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:34,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 20:30:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1289, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 20:30:34,036 INFO L87 Difference]: Start difference. First operand 131 states and 141 transitions. Second operand has 38 states, 38 states have (on average 3.026315789473684) internal successors, (115), 38 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:35,089 INFO L93 Difference]: Finished difference Result 237 states and 252 transitions. [2022-12-13 20:30:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 20:30:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.026315789473684) internal successors, (115), 38 states have internal predecessors, (115), 0 states have call successors, (0), 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 70 [2022-12-13 20:30:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:35,090 INFO L225 Difference]: With dead ends: 237 [2022-12-13 20:30:35,090 INFO L226 Difference]: Without dead ends: 152 [2022-12-13 20:30:35,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=597, Invalid=3563, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 20:30:35,091 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 371 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:35,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 959 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:30:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-13 20:30:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2022-12-13 20:30:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2022-12-13 20:30:35,094 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 70 [2022-12-13 20:30:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:35,094 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2022-12-13 20:30:35,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.026315789473684) internal successors, (115), 38 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2022-12-13 20:30:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 20:30:35,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:35,094 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:35,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 20:30:35,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 20:30:35,296 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:35,297 INFO L85 PathProgramCache]: Analyzing trace with hash 611890839, now seen corresponding path program 10 times [2022-12-13 20:30:35,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:35,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838514589] [2022-12-13 20:30:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:35,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:35,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:35,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838514589] [2022-12-13 20:30:35,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838514589] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:35,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734877668] [2022-12-13 20:30:35,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:30:35,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:35,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:35,659 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:35,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 20:30:35,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:30:35,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:35,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 20:30:35,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:35,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:36,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 20:30:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:36,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734877668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:36,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:36,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2022-12-13 20:30:36,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468250457] [2022-12-13 20:30:36,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:36,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 20:30:36,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:36,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 20:30:36,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1313, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 20:30:36,174 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand has 39 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 39 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:36,734 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2022-12-13 20:30:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 20:30:36,734 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 39 states have internal predecessors, (149), 0 states have call successors, (0), 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 74 [2022-12-13 20:30:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:36,735 INFO L225 Difference]: With dead ends: 175 [2022-12-13 20:30:36,735 INFO L226 Difference]: Without dead ends: 175 [2022-12-13 20:30:36,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=565, Invalid=2297, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 20:30:36,736 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 589 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:36,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 766 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:30:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-13 20:30:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 149. [2022-12-13 20:30:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0810810810810811) internal successors, (160), 148 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) [2022-12-13 20:30:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2022-12-13 20:30:36,738 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 74 [2022-12-13 20:30:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:36,738 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2022-12-13 20:30:36,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.9210526315789473) internal successors, (149), 39 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2022-12-13 20:30:36,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 20:30:36,739 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:36,739 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:36,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 20:30:36,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 20:30:36,939 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:36,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2068571650, now seen corresponding path program 11 times [2022-12-13 20:30:36,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:36,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534020111] [2022-12-13 20:30:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:36,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:37,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:37,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534020111] [2022-12-13 20:30:37,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534020111] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:37,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428674377] [2022-12-13 20:30:37,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:30:37,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:37,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:37,463 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:37,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 20:30:37,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 20:30:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:37,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-13 20:30:37,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:37,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:30:37,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:30:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:37,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:38,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:30:38,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:30:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:38,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428674377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:38,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:38,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 41 [2022-12-13 20:30:38,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864134229] [2022-12-13 20:30:38,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:38,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 20:30:38,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 20:30:38,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 20:30:38,123 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:30:39,210 INFO L93 Difference]: Finished difference Result 269 states and 286 transitions. [2022-12-13 20:30:39,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 20:30:39,210 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 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 79 [2022-12-13 20:30:39,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:30:39,211 INFO L225 Difference]: With dead ends: 269 [2022-12-13 20:30:39,211 INFO L226 Difference]: Without dead ends: 170 [2022-12-13 20:30:39,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=658, Invalid=4312, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 20:30:39,211 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 388 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:30:39,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1113 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:30:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-13 20:30:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2022-12-13 20:30:39,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0769230769230769) internal successors, (168), 156 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 168 transitions. [2022-12-13 20:30:39,214 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 168 transitions. Word has length 79 [2022-12-13 20:30:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:30:39,214 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 168 transitions. [2022-12-13 20:30:39,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:30:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 168 transitions. [2022-12-13 20:30:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-13 20:30:39,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:30:39,214 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:30:39,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 20:30:39,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 20:30:39,416 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:30:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:30:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1739843451, now seen corresponding path program 12 times [2022-12-13 20:30:39,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:30:39,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735635799] [2022-12-13 20:30:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:30:39,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:30:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:30:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 50 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:39,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:30:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735635799] [2022-12-13 20:30:39,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735635799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:30:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921058954] [2022-12-13 20:30:39,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:30:39,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:30:39,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:30:39,963 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:30:39,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 20:30:40,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-12-13 20:30:40,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:30:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 20:30:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:30:40,185 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:30:40,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:30:40,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-12-13 20:30:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:30:41,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-12-13 20:30:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 84 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:42,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:43,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:30:43,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 20:30:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:30:43,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921058954] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:30:43,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:30:43,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 67 [2022-12-13 20:30:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907899461] [2022-12-13 20:30:43,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:30:43,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 20:30:43,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:30:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 20:30:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=4026, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 20:30:43,730 INFO L87 Difference]: Start difference. First operand 157 states and 168 transitions. Second operand has 68 states, 67 states have (on average 3.4328358208955225) internal successors, (230), 68 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:17,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:17,639 INFO L93 Difference]: Finished difference Result 277 states and 295 transitions. [2022-12-13 20:31:17,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-13 20:31:17,640 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.4328358208955225) internal successors, (230), 68 states have internal predecessors, (230), 0 states have call successors, (0), 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 83 [2022-12-13 20:31:17,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:17,640 INFO L225 Difference]: With dead ends: 277 [2022-12-13 20:31:17,640 INFO L226 Difference]: Without dead ends: 277 [2022-12-13 20:31:17,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=4255, Invalid=12515, Unknown=0, NotChecked=0, Total=16770 [2022-12-13 20:31:17,642 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1367 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:17,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1367 Valid, 831 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 20:31:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-12-13 20:31:17,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 227. [2022-12-13 20:31:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.084070796460177) internal successors, (245), 226 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 245 transitions. [2022-12-13 20:31:17,645 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 245 transitions. Word has length 83 [2022-12-13 20:31:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:17,645 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 245 transitions. [2022-12-13 20:31:17,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.4328358208955225) internal successors, (230), 68 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 245 transitions. [2022-12-13 20:31:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-13 20:31:17,645 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:17,645 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:17,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 20:31:17,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 20:31:17,847 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:31:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:17,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1078183756, now seen corresponding path program 13 times [2022-12-13 20:31:17,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:17,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482048685] [2022-12-13 20:31:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:31:19,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482048685] [2022-12-13 20:31:19,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482048685] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220299624] [2022-12-13 20:31:19,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:31:19,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:19,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:19,253 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:19,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 20:31:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:19,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-13 20:31:19,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:19,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:31:20,472 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 20:31:20,473 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 10 [2022-12-13 20:31:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 224 proven. 190 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-13 20:31:20,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:21,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:31:21,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:31:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 224 proven. 190 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-13 20:31:21,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220299624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:21,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:21,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24, 24] total 66 [2022-12-13 20:31:21,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432712749] [2022-12-13 20:31:21,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:21,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-13 20:31:21,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-13 20:31:21,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=4127, Unknown=0, NotChecked=0, Total=4290 [2022-12-13 20:31:21,239 INFO L87 Difference]: Start difference. First operand 227 states and 245 transitions. Second operand has 66 states, 66 states have (on average 3.6363636363636362) internal successors, (240), 66 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:26,747 INFO L93 Difference]: Finished difference Result 361 states and 386 transitions. [2022-12-13 20:31:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 20:31:26,747 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.6363636363636362) internal successors, (240), 66 states have internal predecessors, (240), 0 states have call successors, (0), 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 118 [2022-12-13 20:31:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:26,748 INFO L225 Difference]: With dead ends: 361 [2022-12-13 20:31:26,748 INFO L226 Difference]: Without dead ends: 248 [2022-12-13 20:31:26,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=872, Invalid=10048, Unknown=0, NotChecked=0, Total=10920 [2022-12-13 20:31:26,750 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 486 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 2905 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:26,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 2473 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2905 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 20:31:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-12-13 20:31:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 235. [2022-12-13 20:31:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0811965811965811) internal successors, (253), 234 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 253 transitions. [2022-12-13 20:31:26,755 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 253 transitions. Word has length 118 [2022-12-13 20:31:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:26,755 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 253 transitions. [2022-12-13 20:31:26,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.6363636363636362) internal successors, (240), 66 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 253 transitions. [2022-12-13 20:31:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-13 20:31:26,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:26,756 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:26,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 20:31:26,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:26,957 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:31:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:26,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1880754385, now seen corresponding path program 14 times [2022-12-13 20:31:26,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:26,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719680715] [2022-12-13 20:31:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:26,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 536 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:31:28,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:28,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719680715] [2022-12-13 20:31:28,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719680715] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:28,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059819018] [2022-12-13 20:31:28,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:31:28,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:28,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:28,421 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:28,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 20:31:28,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:31:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:28,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-13 20:31:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:29,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:31:30,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:31:30,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:31:30,240 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 10 [2022-12-13 20:31:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 218 proven. 253 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-13 20:31:30,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:31,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:31:31,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 20:31:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 218 proven. 253 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-13 20:31:32,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059819018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:32,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:32,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 82 [2022-12-13 20:31:32,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474705383] [2022-12-13 20:31:32,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:32,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-12-13 20:31:32,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:32,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-12-13 20:31:32,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6406, Unknown=0, NotChecked=0, Total=6642 [2022-12-13 20:31:32,018 INFO L87 Difference]: Start difference. First operand 235 states and 253 transitions. Second operand has 82 states, 82 states have (on average 3.5121951219512195) internal successors, (288), 82 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:40,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:40,498 INFO L93 Difference]: Finished difference Result 383 states and 409 transitions. [2022-12-13 20:31:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 20:31:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.5121951219512195) internal successors, (288), 82 states have internal predecessors, (288), 0 states have call successors, (0), 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 122 [2022-12-13 20:31:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:40,499 INFO L225 Difference]: With dead ends: 383 [2022-12-13 20:31:40,499 INFO L226 Difference]: Without dead ends: 256 [2022-12-13 20:31:40,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1113, Invalid=14387, Unknown=0, NotChecked=0, Total=15500 [2022-12-13 20:31:40,500 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 654 mSDsluCounter, 3235 mSDsCounter, 0 mSdLazyCounter, 3959 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 3300 SdHoareTripleChecker+Invalid, 3986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:40,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 3300 Invalid, 3986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3959 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 20:31:40,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-12-13 20:31:40,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 243. [2022-12-13 20:31:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.078512396694215) internal successors, (261), 242 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 261 transitions. [2022-12-13 20:31:40,502 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 261 transitions. Word has length 122 [2022-12-13 20:31:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:40,502 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 261 transitions. [2022-12-13 20:31:40,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.5121951219512195) internal successors, (288), 82 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 261 transitions. [2022-12-13 20:31:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-13 20:31:40,503 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:40,503 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:40,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 20:31:40,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:40,704 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:31:40,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash 514359918, now seen corresponding path program 15 times [2022-12-13 20:31:40,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:40,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360488948] [2022-12-13 20:31:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:40,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 569 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:31:42,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360488948] [2022-12-13 20:31:42,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360488948] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934769532] [2022-12-13 20:31:42,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:31:42,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:42,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:42,061 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:42,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 20:31:42,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-12-13 20:31:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:42,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 130 conjunts are in the unsatisfiable core [2022-12-13 20:31:42,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:42,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:31:43,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:31:43,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:31:43,628 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 10 [2022-12-13 20:31:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 202 proven. 325 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 20:31:43,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:44,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:31:44,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:31:44,744 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 202 proven. 325 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 20:31:44,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934769532] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:44,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:44,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 28] total 85 [2022-12-13 20:31:44,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024913474] [2022-12-13 20:31:44,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:44,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-12-13 20:31:44,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:44,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-12-13 20:31:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=6894, Unknown=0, NotChecked=0, Total=7140 [2022-12-13 20:31:44,747 INFO L87 Difference]: Start difference. First operand 243 states and 261 transitions. Second operand has 85 states, 85 states have (on average 3.7176470588235295) internal successors, (316), 85 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:51,247 INFO L93 Difference]: Finished difference Result 405 states and 432 transitions. [2022-12-13 20:31:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 20:31:51,248 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.7176470588235295) internal successors, (316), 85 states have internal predecessors, (316), 0 states have call successors, (0), 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 126 [2022-12-13 20:31:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:51,248 INFO L225 Difference]: With dead ends: 405 [2022-12-13 20:31:51,248 INFO L226 Difference]: Without dead ends: 264 [2022-12-13 20:31:51,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3093 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1206, Invalid=16086, Unknown=0, NotChecked=0, Total=17292 [2022-12-13 20:31:51,249 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 770 mSDsluCounter, 3626 mSDsCounter, 0 mSdLazyCounter, 4262 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 3698 SdHoareTripleChecker+Invalid, 4290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:51,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 3698 Invalid, 4290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4262 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 20:31:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-13 20:31:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 251. [2022-12-13 20:31:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.076) internal successors, (269), 250 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 269 transitions. [2022-12-13 20:31:51,252 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 269 transitions. Word has length 126 [2022-12-13 20:31:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:51,252 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 269 transitions. [2022-12-13 20:31:51,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.7176470588235295) internal successors, (316), 85 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 269 transitions. [2022-12-13 20:31:51,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-13 20:31:51,253 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:51,253 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:51,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 20:31:51,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:51,454 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:31:51,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash -2013862517, now seen corresponding path program 16 times [2022-12-13 20:31:51,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:51,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592733550] [2022-12-13 20:31:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:51,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 606 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:31:53,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592733550] [2022-12-13 20:31:53,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592733550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:53,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19669250] [2022-12-13 20:31:53,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:31:53,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:53,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:53,065 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:53,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 20:31:53,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:31:53,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 155 conjunts are in the unsatisfiable core [2022-12-13 20:31:53,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:53,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:33:37,139 INFO L321 Elim1Store]: treesize reduction 41, result has 49.4 percent of original size [2022-12-13 20:33:37,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 108 treesize of output 82 [2022-12-13 20:33:37,142 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-12-13 20:33:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 219 proven. 217 refuted. 146 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 20:33:37,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:33:53,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 129 [2022-12-13 20:33:53,736 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:33:53,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 149 treesize of output 111 [2022-12-13 20:33:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 392 proven. 190 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-13 20:33:55,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19669250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:33:55,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:33:55,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 57, 57] total 141 [2022-12-13 20:33:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620635984] [2022-12-13 20:33:55,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:33:55,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-12-13 20:33:55,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:33:55,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-12-13 20:33:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1184, Invalid=18410, Unknown=146, NotChecked=0, Total=19740 [2022-12-13 20:33:55,127 INFO L87 Difference]: Start difference. First operand 251 states and 269 transitions. Second operand has 141 states, 141 states have (on average 2.354609929078014) internal successors, (332), 141 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:34:07,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:11,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:29,477 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 89 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:34:30,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:42,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:52,975 WARN L233 SmtUtils]: Spent 10.00s on a formula simplification. DAG size of input: 96 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:35:03,385 WARN L233 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 94 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:35:05,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:35:14,318 WARN L233 SmtUtils]: Spent 8.40s on a formula simplification. DAG size of input: 127 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:35:16,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:35:25,202 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification. DAG size of input: 134 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:35:38,804 WARN L233 SmtUtils]: Spent 9.87s on a formula simplification. DAG size of input: 101 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:35:48,161 WARN L233 SmtUtils]: Spent 5.88s on a formula simplification. DAG size of input: 103 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:35:49,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:36:00,914 WARN L233 SmtUtils]: Spent 10.86s on a formula simplification. DAG size of input: 145 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:36:22,485 WARN L233 SmtUtils]: Spent 19.20s on a formula simplification. DAG size of input: 152 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:36:29,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:36:40,880 WARN L233 SmtUtils]: Spent 10.25s on a formula simplification. DAG size of input: 105 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:36:55,903 WARN L233 SmtUtils]: Spent 13.41s on a formula simplification. DAG size of input: 110 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:37:05,729 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 104 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:37:06,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:37:07,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:37:20,181 WARN L233 SmtUtils]: Spent 11.55s on a formula simplification. DAG size of input: 150 DAG size of output: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:37:21,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:37:33,430 WARN L233 SmtUtils]: Spent 10.98s on a formula simplification. DAG size of input: 157 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:37:39,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:37:59,862 WARN L233 SmtUtils]: Spent 18.42s on a formula simplification. DAG size of input: 116 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:38:10,576 WARN L233 SmtUtils]: Spent 9.70s on a formula simplification. DAG size of input: 114 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:38:26,172 WARN L233 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 169 DAG size of output: 116 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:38:48,446 WARN L233 SmtUtils]: Spent 20.93s on a formula simplification. DAG size of input: 176 DAG size of output: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:38:49,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:38:56,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:39:19,314 WARN L233 SmtUtils]: Spent 22.29s on a formula simplification. DAG size of input: 126 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:39:33,839 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 119 DAG size of output: 116 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:39:35,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:39:36,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:40:00,115 WARN L233 SmtUtils]: Spent 20.49s on a formula simplification. DAG size of input: 183 DAG size of output: 121 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:40:19,492 WARN L233 SmtUtils]: Spent 16.64s on a formula simplification. DAG size of input: 190 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:40:28,523 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 120 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:40:47,762 WARN L233 SmtUtils]: Spent 18.89s on a formula simplification. DAG size of input: 136 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:40:57,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:41:15,052 WARN L233 SmtUtils]: Spent 16.34s on a formula simplification. DAG size of input: 186 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:41:26,385 WARN L233 SmtUtils]: Spent 9.38s on a formula simplification. DAG size of input: 193 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:41:35,362 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 130 DAG size of output: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:41:56,722 WARN L233 SmtUtils]: Spent 20.96s on a formula simplification. DAG size of input: 140 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:41:58,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:42:06,888 WARN L233 SmtUtils]: Spent 7.82s on a formula simplification. DAG size of input: 125 DAG size of output: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:42:28,063 WARN L233 SmtUtils]: Spent 20.23s on a formula simplification. DAG size of input: 193 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:42:47,283 WARN L233 SmtUtils]: Spent 16.56s on a formula simplification. DAG size of input: 201 DAG size of output: 134 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:42:58,364 WARN L233 SmtUtils]: Spent 10.50s on a formula simplification. DAG size of input: 134 DAG size of output: 121 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:43:16,248 WARN L233 SmtUtils]: Spent 17.18s on a formula simplification. DAG size of input: 131 DAG size of output: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:43:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:43:16,386 INFO L93 Difference]: Finished difference Result 427 states and 455 transitions. [2022-12-13 20:43:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-13 20:43:16,386 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.354609929078014) internal successors, (332), 141 states have internal predecessors, (332), 0 states have call successors, (0), 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 130 [2022-12-13 20:43:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:43:16,387 INFO L225 Difference]: With dead ends: 427 [2022-12-13 20:43:16,387 INFO L226 Difference]: Without dead ends: 272 [2022-12-13 20:43:16,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 151 SyntacticMatches, 6 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10338 ImplicationChecksByTransitivity, 647.5s TimeCoverageRelationStatistics Valid=4571, Invalid=40013, Unknown=148, NotChecked=0, Total=44732 [2022-12-13 20:43:16,390 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1152 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 4891 mSolverCounterSat, 28 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 4940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 4891 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:43:16,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 1782 Invalid, 4940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 4891 Invalid, 21 Unknown, 0 Unchecked, 34.7s Time] [2022-12-13 20:43:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-13 20:43:16,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 259. [2022-12-13 20:43:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.073643410852713) internal successors, (277), 258 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:16,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 277 transitions. [2022-12-13 20:43:16,394 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 277 transitions. Word has length 130 [2022-12-13 20:43:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:43:16,394 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 277 transitions. [2022-12-13 20:43:16,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.354609929078014) internal successors, (332), 141 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 277 transitions. [2022-12-13 20:43:16,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-13 20:43:16,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:43:16,395 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:43:16,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 20:43:16,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-13 20:43:16,597 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:43:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:43:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash 250901032, now seen corresponding path program 17 times [2022-12-13 20:43:16,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:43:16,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067737570] [2022-12-13 20:43:16,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:43:16,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:43:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:43:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 647 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:18,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:43:18,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067737570] [2022-12-13 20:43:18,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067737570] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:43:18,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565364614] [2022-12-13 20:43:18,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:43:18,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:43:18,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:43:18,211 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:43:18,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 20:43:18,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 20:43:18,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:43:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 132 conjunts are in the unsatisfiable core [2022-12-13 20:43:18,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:43:18,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:43:20,173 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 20:43:20,173 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 10 [2022-12-13 20:43:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 140 proven. 496 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 20:43:20,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:43:21,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:43:21,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:43:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 140 proven. 496 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 20:43:21,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565364614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:43:21,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:43:21,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32, 32] total 82 [2022-12-13 20:43:21,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181160067] [2022-12-13 20:43:21,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:43:21,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-12-13 20:43:21,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:43:21,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-12-13 20:43:21,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=6425, Unknown=0, NotChecked=0, Total=6642 [2022-12-13 20:43:21,583 INFO L87 Difference]: Start difference. First operand 259 states and 277 transitions. Second operand has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:30,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:43:30,753 INFO L93 Difference]: Finished difference Result 449 states and 478 transitions. [2022-12-13 20:43:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 20:43:30,754 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-12-13 20:43:30,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:43:30,755 INFO L225 Difference]: With dead ends: 449 [2022-12-13 20:43:30,756 INFO L226 Difference]: Without dead ends: 280 [2022-12-13 20:43:30,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 219 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 14 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1254, Invalid=17378, Unknown=0, NotChecked=0, Total=18632 [2022-12-13 20:43:30,756 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 720 mSDsluCounter, 4250 mSDsCounter, 0 mSdLazyCounter, 4941 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 4336 SdHoareTripleChecker+Invalid, 4974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:43:30,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 4336 Invalid, 4974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 4941 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-13 20:43:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-12-13 20:43:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 267. [2022-12-13 20:43:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0714285714285714) internal successors, (285), 266 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 285 transitions. [2022-12-13 20:43:30,759 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 285 transitions. Word has length 134 [2022-12-13 20:43:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:43:30,759 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 285 transitions. [2022-12-13 20:43:30,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.8048780487804876) internal successors, (312), 82 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 285 transitions. [2022-12-13 20:43:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-13 20:43:30,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:43:30,760 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:43:30,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 20:43:30,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:43:30,960 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:43:30,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:43:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1930401723, now seen corresponding path program 18 times [2022-12-13 20:43:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:43:30,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278401517] [2022-12-13 20:43:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:43:30,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:43:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:43:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 0 proven. 692 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:32,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:43:32,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278401517] [2022-12-13 20:43:32,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278401517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:43:32,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213453583] [2022-12-13 20:43:32,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:43:32,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:43:32,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:43:32,522 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:43:32,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 20:43:32,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-12-13 20:43:32,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:43:32,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 109 conjunts are in the unsatisfiable core [2022-12-13 20:43:32,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:43:32,958 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 20:43:32,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-13 20:43:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 404 proven. 288 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:35,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:43:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 404 proven. 288 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:37,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213453583] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:43:37,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:43:37,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 98 [2022-12-13 20:43:37,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686328704] [2022-12-13 20:43:37,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:43:37,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-12-13 20:43:37,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:43:37,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-12-13 20:43:37,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=8490, Unknown=0, NotChecked=0, Total=9506 [2022-12-13 20:43:37,507 INFO L87 Difference]: Start difference. First operand 267 states and 285 transitions. Second operand has 98 states, 98 states have (on average 3.9081632653061225) internal successors, (383), 98 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:42,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:43:42,341 INFO L93 Difference]: Finished difference Result 467 states and 497 transitions. [2022-12-13 20:43:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 20:43:42,342 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.9081632653061225) internal successors, (383), 98 states have internal predecessors, (383), 0 states have call successors, (0), 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 138 [2022-12-13 20:43:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:43:42,342 INFO L225 Difference]: With dead ends: 467 [2022-12-13 20:43:42,342 INFO L226 Difference]: Without dead ends: 281 [2022-12-13 20:43:42,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2385, Invalid=13871, Unknown=0, NotChecked=0, Total=16256 [2022-12-13 20:43:42,343 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 320 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 2209 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:43:42,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 2513 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2209 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 20:43:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-12-13 20:43:42,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 275. [2022-12-13 20:43:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0693430656934306) internal successors, (293), 274 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 293 transitions. [2022-12-13 20:43:42,346 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 293 transitions. Word has length 138 [2022-12-13 20:43:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:43:42,346 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 293 transitions. [2022-12-13 20:43:42,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.9081632653061225) internal successors, (383), 98 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:42,346 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 293 transitions. [2022-12-13 20:43:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-13 20:43:42,347 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:43:42,347 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:43:42,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-13 20:43:42,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 20:43:42,549 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:43:42,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:43:42,550 INFO L85 PathProgramCache]: Analyzing trace with hash 563742690, now seen corresponding path program 19 times [2022-12-13 20:43:42,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:43:42,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636294736] [2022-12-13 20:43:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:43:42,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:43:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:43:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:43,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:43:43,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636294736] [2022-12-13 20:43:43,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636294736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:43:43,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921351857] [2022-12-13 20:43:43,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:43:43,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:43:43,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:43:43,751 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:43:43,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 20:43:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:43:43,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 152 conjunts are in the unsatisfiable core [2022-12-13 20:43:43,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:43:44,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:43:44,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:43:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:44,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:43:44,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:43:44,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:43:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 747 backedges. 38 proven. 703 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:44,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921351857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:43:44,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:43:44,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 36] total 62 [2022-12-13 20:43:44,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772872787] [2022-12-13 20:43:44,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:43:44,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 20:43:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:43:44,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 20:43:44,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3601, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 20:43:44,929 INFO L87 Difference]: Start difference. First operand 275 states and 293 transitions. Second operand has 62 states, 62 states have (on average 3.532258064516129) internal successors, (219), 62 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:43:48,503 INFO L93 Difference]: Finished difference Result 493 states and 524 transitions. [2022-12-13 20:43:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 20:43:48,504 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.532258064516129) internal successors, (219), 62 states have internal predecessors, (219), 0 states have call successors, (0), 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 142 [2022-12-13 20:43:48,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:43:48,504 INFO L225 Difference]: With dead ends: 493 [2022-12-13 20:43:48,504 INFO L226 Difference]: Without dead ends: 296 [2022-12-13 20:43:48,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1085, Invalid=11571, Unknown=0, NotChecked=0, Total=12656 [2022-12-13 20:43:48,505 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 786 mSDsluCounter, 3567 mSDsCounter, 0 mSdLazyCounter, 3989 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 3668 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:43:48,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 3668 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3989 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 20:43:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-13 20:43:48,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 283. [2022-12-13 20:43:48,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0673758865248226) internal successors, (301), 282 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:48,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 301 transitions. [2022-12-13 20:43:48,509 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 301 transitions. Word has length 142 [2022-12-13 20:43:48,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:43:48,509 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 301 transitions. [2022-12-13 20:43:48,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.532258064516129) internal successors, (219), 62 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:48,510 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 301 transitions. [2022-12-13 20:43:48,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 20:43:48,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:43:48,511 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:43:48,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 20:43:48,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 20:43:48,712 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:43:48,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:43:48,713 INFO L85 PathProgramCache]: Analyzing trace with hash 50368767, now seen corresponding path program 20 times [2022-12-13 20:43:48,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:43:48,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659552838] [2022-12-13 20:43:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:43:48,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:43:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:43:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 288 proven. 506 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:49,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:43:49,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659552838] [2022-12-13 20:43:49,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659552838] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:43:49,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285340365] [2022-12-13 20:43:49,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:43:49,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:43:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:43:49,776 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:43:49,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 20:43:49,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:43:49,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:43:49,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 136 conjunts are in the unsatisfiable core [2022-12-13 20:43:49,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:43:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 325 proven. 469 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:50,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:43:50,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 20:43:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 325 proven. 469 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:51,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285340365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:43:51,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:43:51,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 71 [2022-12-13 20:43:51,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733851331] [2022-12-13 20:43:51,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:43:51,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-12-13 20:43:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:43:51,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-12-13 20:43:51,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=4549, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 20:43:51,260 INFO L87 Difference]: Start difference. First operand 283 states and 301 transitions. Second operand has 72 states, 71 states have (on average 4.056338028169014) internal successors, (288), 72 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:43:52,991 INFO L93 Difference]: Finished difference Result 351 states and 371 transitions. [2022-12-13 20:43:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 20:43:52,992 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 4.056338028169014) internal successors, (288), 72 states have internal predecessors, (288), 0 states have call successors, (0), 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 146 [2022-12-13 20:43:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:43:52,992 INFO L225 Difference]: With dead ends: 351 [2022-12-13 20:43:52,992 INFO L226 Difference]: Without dead ends: 351 [2022-12-13 20:43:52,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 239 SyntacticMatches, 15 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3115 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2100, Invalid=8612, Unknown=0, NotChecked=0, Total=10712 [2022-12-13 20:43:52,993 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 869 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:43:52,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 2489 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 20:43:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-12-13 20:43:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 293. [2022-12-13 20:43:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0684931506849316) internal successors, (312), 292 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 312 transitions. [2022-12-13 20:43:52,996 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 312 transitions. Word has length 146 [2022-12-13 20:43:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:43:52,996 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 312 transitions. [2022-12-13 20:43:52,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 4.056338028169014) internal successors, (288), 72 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:43:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 312 transitions. [2022-12-13 20:43:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-13 20:43:52,997 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:43:52,997 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:43:53,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 20:43:53,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 20:43:53,198 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:43:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:43:53,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1259621530, now seen corresponding path program 21 times [2022-12-13 20:43:53,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:43:53,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596942196] [2022-12-13 20:43:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:43:53,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:43:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:43:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:54,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:43:54,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596942196] [2022-12-13 20:43:54,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596942196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:43:54,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733272045] [2022-12-13 20:43:54,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:43:54,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:43:54,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:43:54,569 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:43:54,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 20:43:55,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 20:43:55,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:43:55,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 166 conjunts are in the unsatisfiable core [2022-12-13 20:43:55,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:43:55,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 20:43:56,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:43:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:56,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:43:56,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:43:56,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:43:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 41 proven. 820 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:43:56,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733272045] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:43:56,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:43:56,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 38] total 77 [2022-12-13 20:43:56,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698759653] [2022-12-13 20:43:56,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:43:56,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 20:43:56,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:43:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 20:43:56,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5624, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 20:43:56,843 INFO L87 Difference]: Start difference. First operand 293 states and 312 transitions. Second operand has 77 states, 77 states have (on average 3.8051948051948052) internal successors, (293), 77 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:44:00,401 INFO L93 Difference]: Finished difference Result 525 states and 558 transitions. [2022-12-13 20:44:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-13 20:44:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.8051948051948052) internal successors, (293), 77 states have internal predecessors, (293), 0 states have call successors, (0), 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 151 [2022-12-13 20:44:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:44:00,402 INFO L225 Difference]: With dead ends: 525 [2022-12-13 20:44:00,402 INFO L226 Difference]: Without dead ends: 314 [2022-12-13 20:44:00,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 263 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3698 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1082, Invalid=15174, Unknown=0, NotChecked=0, Total=16256 [2022-12-13 20:44:00,403 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 622 mSDsluCounter, 5029 mSDsCounter, 0 mSdLazyCounter, 5607 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 5137 SdHoareTripleChecker+Invalid, 5638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 5607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:44:00,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 5137 Invalid, 5638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 5607 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 20:44:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-12-13 20:44:00,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 301. [2022-12-13 20:44:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0666666666666667) internal successors, (320), 300 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 320 transitions. [2022-12-13 20:44:00,405 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 320 transitions. Word has length 151 [2022-12-13 20:44:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:44:00,406 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 320 transitions. [2022-12-13 20:44:00,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.8051948051948052) internal successors, (293), 77 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 320 transitions. [2022-12-13 20:44:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-13 20:44:00,406 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:44:00,406 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:44:00,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 20:44:00,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 20:44:00,608 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:44:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:44:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1773554659, now seen corresponding path program 22 times [2022-12-13 20:44:00,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:44:00,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063855834] [2022-12-13 20:44:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:44:00,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:44:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:44:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 338 proven. 580 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:01,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:44:01,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063855834] [2022-12-13 20:44:01,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063855834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:44:01,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730214257] [2022-12-13 20:44:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:44:01,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:44:01,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:44:01,996 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:44:01,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 20:44:02,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:44:02,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:44:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 142 conjunts are in the unsatisfiable core [2022-12-13 20:44:02,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:44:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 392 proven. 526 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:02,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:44:03,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 20:44:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 392 proven. 526 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:03,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730214257] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:44:03,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:44:03,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 75 [2022-12-13 20:44:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257865261] [2022-12-13 20:44:03,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:44:03,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-13 20:44:03,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:44:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-13 20:44:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=5067, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 20:44:03,762 INFO L87 Difference]: Start difference. First operand 301 states and 320 transitions. Second operand has 76 states, 75 states have (on average 4.1466666666666665) internal successors, (311), 76 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:44:06,047 INFO L93 Difference]: Finished difference Result 373 states and 394 transitions. [2022-12-13 20:44:06,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 20:44:06,048 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.1466666666666665) internal successors, (311), 76 states have internal predecessors, (311), 0 states have call successors, (0), 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 155 [2022-12-13 20:44:06,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:44:06,050 INFO L225 Difference]: With dead ends: 373 [2022-12-13 20:44:06,050 INFO L226 Difference]: Without dead ends: 373 [2022-12-13 20:44:06,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 256 SyntacticMatches, 15 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2286, Invalid=9486, Unknown=0, NotChecked=0, Total=11772 [2022-12-13 20:44:06,051 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 1582 mSDsluCounter, 2397 mSDsCounter, 0 mSdLazyCounter, 2962 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 2511 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:44:06,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1582 Valid, 2511 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2962 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 20:44:06,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-12-13 20:44:06,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 311. [2022-12-13 20:44:06,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0677419354838709) internal successors, (331), 310 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 331 transitions. [2022-12-13 20:44:06,056 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 331 transitions. Word has length 155 [2022-12-13 20:44:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:44:06,056 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 331 transitions. [2022-12-13 20:44:06,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.1466666666666665) internal successors, (311), 76 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:06,057 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 331 transitions. [2022-12-13 20:44:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-13 20:44:06,057 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:44:06,057 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:44:06,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-13 20:44:06,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:44:06,258 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:44:06,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:44:06,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1245342780, now seen corresponding path program 23 times [2022-12-13 20:44:06,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:44:06,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541660300] [2022-12-13 20:44:06,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:44:06,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:44:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:44:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 44 proven. 946 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:07,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:44:07,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541660300] [2022-12-13 20:44:07,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541660300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:44:07,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073693623] [2022-12-13 20:44:07,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:44:07,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:44:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:44:07,861 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:44:07,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 20:44:08,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-12-13 20:44:08,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:44:08,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 172 conjunts are in the unsatisfiable core [2022-12-13 20:44:08,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:44:08,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 20:44:08,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:44:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 44 proven. 946 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:08,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:44:09,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 20:44:09,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 20:44:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 44 proven. 946 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:09,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073693623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:44:09,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:44:09,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40, 40] total 68 [2022-12-13 20:44:09,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200140055] [2022-12-13 20:44:09,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:44:09,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 20:44:09,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:44:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 20:44:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 20:44:09,275 INFO L87 Difference]: Start difference. First operand 311 states and 331 transitions. Second operand has 68 states, 68 states have (on average 3.6029411764705883) internal successors, (245), 68 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:44:12,987 INFO L93 Difference]: Finished difference Result 557 states and 592 transitions. [2022-12-13 20:44:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-13 20:44:12,987 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.6029411764705883) internal successors, (245), 68 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-12-13 20:44:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:44:12,988 INFO L225 Difference]: With dead ends: 557 [2022-12-13 20:44:12,988 INFO L226 Difference]: Without dead ends: 332 [2022-12-13 20:44:12,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 291 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1207, Invalid=14293, Unknown=0, NotChecked=0, Total=15500 [2022-12-13 20:44:12,989 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 691 mSDsluCounter, 4928 mSDsCounter, 0 mSdLazyCounter, 5401 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 5043 SdHoareTripleChecker+Invalid, 5419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 5401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:44:12,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 5043 Invalid, 5419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 5401 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 20:44:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-12-13 20:44:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 319. [2022-12-13 20:44:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.0660377358490567) internal successors, (339), 318 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 339 transitions. [2022-12-13 20:44:12,992 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 339 transitions. Word has length 160 [2022-12-13 20:44:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:44:12,992 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 339 transitions. [2022-12-13 20:44:12,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.6029411764705883) internal successors, (245), 68 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 339 transitions. [2022-12-13 20:44:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-13 20:44:12,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:44:12,993 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:44:12,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 20:44:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 20:44:13,194 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:44:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:44:13,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1488832537, now seen corresponding path program 24 times [2022-12-13 20:44:13,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:44:13,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810028105] [2022-12-13 20:44:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:44:13,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:44:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:44:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 392 proven. 659 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:14,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:44:14,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810028105] [2022-12-13 20:44:14,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810028105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:44:14,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633849696] [2022-12-13 20:44:14,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:44:14,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:44:14,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:44:14,706 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:44:14,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 20:44:15,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-12-13 20:44:15,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:44:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 127 conjunts are in the unsatisfiable core [2022-12-13 20:44:15,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:44:15,899 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:44:15,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:44:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 435 proven. 616 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:17,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:44:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 435 proven. 616 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:18,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633849696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:44:18,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:44:18,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 113 [2022-12-13 20:44:18,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577284476] [2022-12-13 20:44:18,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:44:18,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-12-13 20:44:18,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:44:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-12-13 20:44:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1661, Invalid=11221, Unknown=0, NotChecked=0, Total=12882 [2022-12-13 20:44:18,856 INFO L87 Difference]: Start difference. First operand 319 states and 339 transitions. Second operand has 114 states, 113 states have (on average 4.123893805309734) internal successors, (466), 114 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:44:21,509 INFO L93 Difference]: Finished difference Result 395 states and 417 transitions. [2022-12-13 20:44:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 20:44:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 4.123893805309734) internal successors, (466), 114 states have internal predecessors, (466), 0 states have call successors, (0), 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 164 [2022-12-13 20:44:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:44:21,510 INFO L225 Difference]: With dead ends: 395 [2022-12-13 20:44:21,510 INFO L226 Difference]: Without dead ends: 395 [2022-12-13 20:44:21,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6179 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4530, Invalid=17820, Unknown=0, NotChecked=0, Total=22350 [2022-12-13 20:44:21,511 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 1452 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:44:21,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1452 Valid, 1850 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1992 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 20:44:21,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-12-13 20:44:21,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 329. [2022-12-13 20:44:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.0670731707317074) internal successors, (350), 328 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 350 transitions. [2022-12-13 20:44:21,515 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 350 transitions. Word has length 164 [2022-12-13 20:44:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:44:21,515 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 350 transitions. [2022-12-13 20:44:21,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 4.123893805309734) internal successors, (466), 114 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:44:21,515 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 350 transitions. [2022-12-13 20:44:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-13 20:44:21,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:44:21,516 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:44:21,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-13 20:44:21,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:44:21,717 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-12-13 20:44:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:44:21,718 INFO L85 PathProgramCache]: Analyzing trace with hash 174028224, now seen corresponding path program 25 times [2022-12-13 20:44:21,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:44:21,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620599327] [2022-12-13 20:44:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:44:21,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:44:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:44:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 47 proven. 1081 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:44:23,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:44:23,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620599327] [2022-12-13 20:44:23,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620599327] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:44:23,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719349807] [2022-12-13 20:44:23,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:44:23,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:44:23,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:44:23,402 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:44:23,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48be3b23-0fbe-4310-a407-3c33ada2d846/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 20:44:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:44:23,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 182 conjunts are in the unsatisfiable core [2022-12-13 20:44:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates...