./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/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_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/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_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/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 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 --- 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 17:28:16,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:28:16,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:28:16,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:28:16,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:28:16,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:28:16,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:28:16,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:28:16,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:28:16,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:28:16,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:28:16,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:28:16,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:28:16,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:28:16,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:28:16,386 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:28:16,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:28:16,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:28:16,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:28:16,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:28:16,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:28:16,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:28:16,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:28:16,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:28:16,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:28:16,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:28:16,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:28:16,396 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:28:16,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:28:16,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:28:16,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:28:16,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:28:16,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:28:16,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:28:16,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:28:16,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:28:16,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:28:16,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:28:16,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:28:16,401 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:28:16,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:28:16,403 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 17:28:16,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:28:16,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:28:16,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:28:16,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:28:16,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:28:16,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:28:16,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:28:16,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:28:16,419 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:28:16,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:28:16,419 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:28:16,420 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 17:28:16,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:28:16,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:28:16,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:28:16,420 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 17:28:16,420 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 17:28:16,420 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 17:28:16,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:28:16,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 17:28:16,421 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:28:16,421 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:28:16,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:28:16,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:28:16,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:28:16,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:28:16,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:28:16,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:28:16,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:28:16,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:28:16,423 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:28:16,423 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:28:16,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:28:16,423 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:28:16,423 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_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ad8bc9cfa3954c0bae4db0509cb11733a45600a9e4ff56ca5bdd4aceeb1fc0 [2022-12-13 17:28:16,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:28:16,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:28:16,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:28:16,618 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:28:16,618 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:28:16,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2022-12-13 17:28:19,190 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:28:19,350 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:28:19,350 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2.c [2022-12-13 17:28:19,354 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/data/83d4c3167/d4eb40241b8544369d938c7fa6db7911/FLAGb5df54383 [2022-12-13 17:28:19,748 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/data/83d4c3167/d4eb40241b8544369d938c7fa6db7911 [2022-12-13 17:28:19,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:28:19,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:28:19,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:28:19,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:28:19,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:28:19,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca3cebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19, skipping insertion in model container [2022-12-13 17:28:19,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:28:19,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:28:19,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:28:19,899 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:28:19,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:28:19,921 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:28:19,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19 WrapperNode [2022-12-13 17:28:19,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:28:19,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:28:19,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:28:19,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:28:19,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,946 INFO L138 Inliner]: procedures = 9, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2022-12-13 17:28:19,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:28:19,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:28:19,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:28:19,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:28:19,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,966 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:28:19,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:28:19,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:28:19,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:28:19,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (1/1) ... [2022-12-13 17:28:19,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:28:19,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:19,995 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:28:19,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:28:20,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:28:20,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:28:20,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:28:20,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 17:28:20,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:28:20,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:28:20,085 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:28:20,087 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:28:20,234 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:28:20,240 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:28:20,240 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 17:28:20,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:28:20 BoogieIcfgContainer [2022-12-13 17:28:20,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:28:20,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:28:20,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:28:20,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:28:20,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:28:19" (1/3) ... [2022-12-13 17:28:20,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d215cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:28:20, skipping insertion in model container [2022-12-13 17:28:20,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:28:19" (2/3) ... [2022-12-13 17:28:20,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49d215cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:28:20, skipping insertion in model container [2022-12-13 17:28:20,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:28:20" (3/3) ... [2022-12-13 17:28:20,251 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2.c [2022-12-13 17:28:20,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:28:20,271 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-12-13 17:28:20,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:28:20,326 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;@233bd4a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:28:20,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-12-13 17:28:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 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 17:28:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-13 17:28:20,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:20,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 17:28:20,336 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash 28698921, now seen corresponding path program 1 times [2022-12-13 17:28:20,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:20,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942866832] [2022-12-13 17:28:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:20,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:20,585 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 17:28:20,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:20,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942866832] [2022-12-13 17:28:20,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942866832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:20,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:20,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:28:20,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287086860] [2022-12-13 17:28:20,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:20,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:28:20,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:28:20,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:28:20,619 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.75) internal successors, (49), 39 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 17:28:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:20,701 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2022-12-13 17:28:20,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:28:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-13 17:28:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:20,709 INFO L225 Difference]: With dead ends: 69 [2022-12-13 17:28:20,709 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 17:28:20,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:20,715 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:20,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 84 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:28:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 17:28:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2022-12-13 17:28:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 38 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 17:28:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-12-13 17:28:20,743 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 5 [2022-12-13 17:28:20,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:20,743 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-12-13 17:28:20,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 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 17:28:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-12-13 17:28:20,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 17:28:20,744 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:20,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:20,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:28:20,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:20,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:20,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1809811544, now seen corresponding path program 1 times [2022-12-13 17:28:20,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:20,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041182164] [2022-12-13 17:28:20,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:20,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:20,839 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 17:28:20,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:20,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041182164] [2022-12-13 17:28:20,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041182164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:20,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:20,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:28:20,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751106425] [2022-12-13 17:28:20,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:20,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:28:20,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:28:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:20,843 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 1.4) 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 17:28:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:20,918 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-12-13 17:28:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:28:20,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) 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 17:28:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:20,919 INFO L225 Difference]: With dead ends: 70 [2022-12-13 17:28:20,920 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 17:28:20,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:28:20,921 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 83 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:20,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:28:20,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 17:28:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2022-12-13 17:28:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 17:28:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-12-13 17:28:20,926 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 7 [2022-12-13 17:28:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:20,927 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-12-13 17:28:20,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) 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 17:28:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-12-13 17:28:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 17:28:20,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:20,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:20,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:28:20,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:20,929 INFO L85 PathProgramCache]: Analyzing trace with hash -489510905, now seen corresponding path program 1 times [2022-12-13 17:28:20,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:20,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305059315] [2022-12-13 17:28:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:20,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:20,995 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 17:28:20,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:20,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305059315] [2022-12-13 17:28:20,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305059315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:20,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:20,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 17:28:20,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624146998] [2022-12-13 17:28:20,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:20,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:28:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:20,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:28:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:20,997 INFO L87 Difference]: Start difference. First operand 41 states and 45 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 17:28:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:21,030 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-12-13 17:28:21,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 17:28:21,031 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 17:28:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:21,032 INFO L225 Difference]: With dead ends: 75 [2022-12-13 17:28:21,032 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 17:28:21,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 17:28:21,033 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 63 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:21,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 152 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:28:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 17:28:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2022-12-13 17:28:21,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:21,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-12-13 17:28:21,037 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 11 [2022-12-13 17:28:21,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:21,037 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-12-13 17:28:21,037 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 17:28:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-12-13 17:28:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 17:28:21,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:21,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:21,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:28:21,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash -489508983, now seen corresponding path program 1 times [2022-12-13 17:28:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:21,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100795644] [2022-12-13 17:28:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:21,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:21,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:21,120 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 17:28:21,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:21,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100795644] [2022-12-13 17:28:21,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100795644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:21,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:21,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:28:21,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075952471] [2022-12-13 17:28:21,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:21,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:28:21,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:28:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:28:21,123 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 17:28:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:21,152 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-12-13 17:28:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:28:21,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 17:28:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:21,153 INFO L225 Difference]: With dead ends: 43 [2022-12-13 17:28:21,153 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 17:28:21,153 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 17:28:21,155 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 41 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:21,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:28:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 17:28:21,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-13 17:28:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.411764705882353) internal successors, (48), 42 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 17:28:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-12-13 17:28:21,160 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 11 [2022-12-13 17:28:21,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:21,160 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-12-13 17:28:21,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 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 17:28:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-12-13 17:28:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 17:28:21,161 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:21,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:21,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:28:21,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:21,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:21,162 INFO L85 PathProgramCache]: Analyzing trace with hash -489508982, now seen corresponding path program 1 times [2022-12-13 17:28:21,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:21,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236984725] [2022-12-13 17:28:21,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:21,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:21,310 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 17:28:21,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:21,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236984725] [2022-12-13 17:28:21,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236984725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:21,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:21,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 17:28:21,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006711832] [2022-12-13 17:28:21,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:21,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 17:28:21,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 17:28:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:21,313 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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 17:28:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:21,371 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-12-13 17:28:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:28:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 17:28:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:21,372 INFO L225 Difference]: With dead ends: 50 [2022-12-13 17:28:21,372 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 17:28:21,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 17:28:21,374 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:21,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 69 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:28:21,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 17:28:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-12-13 17:28:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.358974358974359) internal successors, (53), 47 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 17:28:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-12-13 17:28:21,379 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 11 [2022-12-13 17:28:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:21,379 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-12-13 17:28:21,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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 17:28:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-12-13 17:28:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 17:28:21,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:21,380 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:21,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:28:21,380 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839934, now seen corresponding path program 1 times [2022-12-13 17:28:21,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:21,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046434461] [2022-12-13 17:28:21,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:21,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:21,459 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 17:28:21,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:21,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046434461] [2022-12-13 17:28:21,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046434461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:21,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:21,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:28:21,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667923012] [2022-12-13 17:28:21,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:21,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:28:21,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:21,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:28:21,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:28:21,461 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:21,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:21,490 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2022-12-13 17:28:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:28:21,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 17:28:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:21,491 INFO L225 Difference]: With dead ends: 47 [2022-12-13 17:28:21,491 INFO L226 Difference]: Without dead ends: 47 [2022-12-13 17:28:21,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:21,492 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:21,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:28:21,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-13 17:28:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-13 17:28:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 17:28:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-12-13 17:28:21,496 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2022-12-13 17:28:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:21,496 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-12-13 17:28:21,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:21,496 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-12-13 17:28:21,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 17:28:21,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:21,497 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:21,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:28:21,497 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:21,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:21,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1675839933, now seen corresponding path program 1 times [2022-12-13 17:28:21,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:21,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054153230] [2022-12-13 17:28:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:21,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:21,678 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 17:28:21,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054153230] [2022-12-13 17:28:21,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054153230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530809473] [2022-12-13 17:28:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:21,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:21,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:21,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:21,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:28:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:21,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 17:28:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:21,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 17:28:21,886 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:28:21,887 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 11 treesize of output 11 [2022-12-13 17:28:21,907 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 17:28:21,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:26,096 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 51 treesize of output 47 [2022-12-13 17:28:26,111 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:26,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 62 [2022-12-13 17:28:26,184 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 17:28:26,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530809473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:26,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:26,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2022-12-13 17:28:26,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454894751] [2022-12-13 17:28:26,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:26,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:28:26,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:26,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:28:26,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:28:26,186 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:26,523 INFO L93 Difference]: Finished difference Result 147 states and 168 transitions. [2022-12-13 17:28:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:28:26,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-13 17:28:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:26,526 INFO L225 Difference]: With dead ends: 147 [2022-12-13 17:28:26,526 INFO L226 Difference]: Without dead ends: 147 [2022-12-13 17:28:26,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-12-13 17:28:26,527 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 355 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:26,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 75 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-13 17:28:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 56. [2022-12-13 17:28:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 17:28:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-12-13 17:28:26,533 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 16 [2022-12-13 17:28:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:26,533 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-12-13 17:28:26,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:26,533 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-12-13 17:28:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 17:28:26,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:26,534 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:26,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:26,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 17:28:26,735 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash -411430410, now seen corresponding path program 1 times [2022-12-13 17:28:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:26,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93490160] [2022-12-13 17:28:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:26,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:26,830 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 17:28:26,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93490160] [2022-12-13 17:28:26,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93490160] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:26,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:26,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:28:26,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435648494] [2022-12-13 17:28:26,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:26,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:28:26,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:28:26,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:28:26,835 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 17:28:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:26,867 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-12-13 17:28:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:28:26,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 17:28:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:26,868 INFO L225 Difference]: With dead ends: 55 [2022-12-13 17:28:26,868 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 17:28:26,868 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 17:28:26,870 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:26,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:28:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 17:28:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-13 17:28:26,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.3125) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 17:28:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-12-13 17:28:26,876 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 17 [2022-12-13 17:28:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:26,876 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-12-13 17:28:26,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 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 17:28:26,877 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-12-13 17:28:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 17:28:26,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:26,877 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:26,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:28:26,878 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:26,878 INFO L85 PathProgramCache]: Analyzing trace with hash -411430409, now seen corresponding path program 1 times [2022-12-13 17:28:26,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:26,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179326713] [2022-12-13 17:28:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:26,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:26,987 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 17:28:26,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:26,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179326713] [2022-12-13 17:28:26,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179326713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:26,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364502336] [2022-12-13 17:28:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:26,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:26,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:26,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:26,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:28:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:27,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 17:28:27,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:27,093 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:28:27,106 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 17:28:27,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:27,169 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 17:28:27,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364502336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:27,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:27,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 17:28:27,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64181636] [2022-12-13 17:28:27,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:27,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:28:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:28:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:28:27,171 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:28:27,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:27,377 INFO L93 Difference]: Finished difference Result 190 states and 222 transitions. [2022-12-13 17:28:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:28:27,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 17:28:27,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:27,379 INFO L225 Difference]: With dead ends: 190 [2022-12-13 17:28:27,379 INFO L226 Difference]: Without dead ends: 190 [2022-12-13 17:28:27,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:28:27,380 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 325 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:27,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 105 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-13 17:28:27,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 104. [2022-12-13 17:28:27,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 103 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2022-12-13 17:28:27,387 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 17 [2022-12-13 17:28:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:27,388 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2022-12-13 17:28:27,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 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 17:28:27,388 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2022-12-13 17:28:27,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 17:28:27,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:27,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:27,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:28:27,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:27,590 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:27,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:27,591 INFO L85 PathProgramCache]: Analyzing trace with hash 130511665, now seen corresponding path program 1 times [2022-12-13 17:28:27,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:27,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974782866] [2022-12-13 17:28:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:27,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:27,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:27,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974782866] [2022-12-13 17:28:27,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974782866] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:28:27,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:28:27,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:28:27,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715646602] [2022-12-13 17:28:27,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:28:27,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 17:28:27,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:27,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 17:28:27,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 17:28:27,739 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 17:28:27,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:27,775 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2022-12-13 17:28:27,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 17:28:27,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 17:28:27,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:27,776 INFO L225 Difference]: With dead ends: 103 [2022-12-13 17:28:27,777 INFO L226 Difference]: Without dead ends: 103 [2022-12-13 17:28:27,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 17:28:27,778 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 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 17:28:27,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:28:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-13 17:28:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-12-13 17:28:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 102 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 17:28:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 130 transitions. [2022-12-13 17:28:27,784 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 130 transitions. Word has length 18 [2022-12-13 17:28:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:27,785 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 130 transitions. [2022-12-13 17:28:27,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 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 17:28:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 130 transitions. [2022-12-13 17:28:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 17:28:27,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:27,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:27,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:28:27,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:27,786 INFO L85 PathProgramCache]: Analyzing trace with hash 130511666, now seen corresponding path program 1 times [2022-12-13 17:28:27,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:27,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702733204] [2022-12-13 17:28:27,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:27,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:27,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:27,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702733204] [2022-12-13 17:28:27,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702733204] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:27,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687945253] [2022-12-13 17:28:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:27,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:27,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:27,834 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:27,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:28:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:27,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:28:27,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:27,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:27,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687945253] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:27,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:27,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 17:28:27,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416733442] [2022-12-13 17:28:27,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:27,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:28:27,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:27,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:28:27,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:28:27,958 INFO L87 Difference]: Start difference. First operand 103 states and 130 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:28,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:28,035 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2022-12-13 17:28:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 17:28:28,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 17:28:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:28,036 INFO L225 Difference]: With dead ends: 111 [2022-12-13 17:28:28,036 INFO L226 Difference]: Without dead ends: 111 [2022-12-13 17:28:28,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:28:28,037 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:28,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 117 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-13 17:28:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2022-12-13 17:28:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 97 states have (on average 1.2989690721649485) internal successors, (126), 102 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 17:28:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-12-13 17:28:28,040 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 18 [2022-12-13 17:28:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:28,040 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-12-13 17:28:28,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-12-13 17:28:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 17:28:28,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:28,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:28,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:28:28,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 17:28:28,242 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:28,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:28,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1752050598, now seen corresponding path program 1 times [2022-12-13 17:28:28,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:28,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403918981] [2022-12-13 17:28:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:28,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:28,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:28,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403918981] [2022-12-13 17:28:28,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403918981] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:28,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190668359] [2022-12-13 17:28:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:28,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:28,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:28,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:28,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:28:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:28,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 17:28:28,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:28,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:28,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190668359] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:28,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:28,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-12-13 17:28:28,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866196438] [2022-12-13 17:28:28,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:28,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:28:28,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:28,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:28:28,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:28:28,450 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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 17:28:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:28,567 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2022-12-13 17:28:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:28:28,568 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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 21 [2022-12-13 17:28:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:28,569 INFO L225 Difference]: With dead ends: 111 [2022-12-13 17:28:28,569 INFO L226 Difference]: Without dead ends: 111 [2022-12-13 17:28:28,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:28:28,569 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 173 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:28,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 106 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-13 17:28:28,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2022-12-13 17:28:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 17:28:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2022-12-13 17:28:28,573 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 21 [2022-12-13 17:28:28,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:28,574 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-12-13 17:28:28,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 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 17:28:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2022-12-13 17:28:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 17:28:28,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:28,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:28,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:28:28,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 17:28:28,775 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:28,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash -93493367, now seen corresponding path program 1 times [2022-12-13 17:28:28,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:28,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479039789] [2022-12-13 17:28:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:28,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:28,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:28,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479039789] [2022-12-13 17:28:28,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479039789] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:28,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388764940] [2022-12-13 17:28:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:28,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:28,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:28,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:28,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 17:28:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:28,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:28:28,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:29,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:29,043 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 17:28:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:29,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388764940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:29,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:29,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-12-13 17:28:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043949893] [2022-12-13 17:28:29,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:29,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 17:28:29,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 17:28:29,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:28:29,061 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 17:28:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:29,177 INFO L93 Difference]: Finished difference Result 140 states and 165 transitions. [2022-12-13 17:28:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:28:29,177 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-13 17:28:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:29,178 INFO L225 Difference]: With dead ends: 140 [2022-12-13 17:28:29,178 INFO L226 Difference]: Without dead ends: 140 [2022-12-13 17:28:29,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:28:29,179 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 117 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:29,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 99 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-13 17:28:29,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 104. [2022-12-13 17:28:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 103 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 17:28:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2022-12-13 17:28:29,183 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 23 [2022-12-13 17:28:29,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:29,183 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2022-12-13 17:28:29,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 17:28:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2022-12-13 17:28:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:28:29,184 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:29,184 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:29,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 17:28:29,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:29,385 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:29,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452358, now seen corresponding path program 1 times [2022-12-13 17:28:29,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:29,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439406970] [2022-12-13 17:28:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:29,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:29,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:29,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439406970] [2022-12-13 17:28:29,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439406970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:29,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065558583] [2022-12-13 17:28:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:29,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:29,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:29,517 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:29,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 17:28:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:29,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:28:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:29,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:29,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065558583] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:29,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:29,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-12-13 17:28:29,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394496320] [2022-12-13 17:28:29,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:29,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 17:28:29,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:29,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 17:28:29,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-13 17:28:29,653 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 17:28:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:29,723 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-12-13 17:28:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:28:29,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 27 [2022-12-13 17:28:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:29,724 INFO L225 Difference]: With dead ends: 101 [2022-12-13 17:28:29,724 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 17:28:29,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:28:29,725 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 102 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:29,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 82 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 17:28:29,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 17:28:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-12-13 17:28:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.2584269662921348) internal successors, (112), 94 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 17:28:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2022-12-13 17:28:29,728 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 27 [2022-12-13 17:28:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:29,728 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2022-12-13 17:28:29,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 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 17:28:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2022-12-13 17:28:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 17:28:29,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:29,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:29,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 17:28:29,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:29,929 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1360755252, now seen corresponding path program 1 times [2022-12-13 17:28:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:29,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982973045] [2022-12-13 17:28:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:29,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:30,015 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 17:28:30,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:30,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982973045] [2022-12-13 17:28:30,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982973045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:30,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554660651] [2022-12-13 17:28:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:30,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:30,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:30,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 17:28:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:30,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:28:30,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:30,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:30,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554660651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:30,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:30,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 17:28:30,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880089741] [2022-12-13 17:28:30,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:30,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:28:30,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:30,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:28:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:28:30,181 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:30,328 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2022-12-13 17:28:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 17:28:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 17:28:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:30,330 INFO L225 Difference]: With dead ends: 105 [2022-12-13 17:28:30,330 INFO L226 Difference]: Without dead ends: 105 [2022-12-13 17:28:30,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:28:30,331 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 180 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:30,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 180 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-13 17:28:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2022-12-13 17:28:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.2386363636363635) internal successors, (109), 93 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 17:28:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2022-12-13 17:28:30,334 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 27 [2022-12-13 17:28:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:30,334 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2022-12-13 17:28:30,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2022-12-13 17:28:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 17:28:30,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:30,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:30,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 17:28:30,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 17:28:30,536 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:30,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:30,536 INFO L85 PathProgramCache]: Analyzing trace with hash -144329733, now seen corresponding path program 1 times [2022-12-13 17:28:30,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:30,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979926625] [2022-12-13 17:28:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:30,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:30,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:30,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:30,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979926625] [2022-12-13 17:28:30,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979926625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:30,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848598126] [2022-12-13 17:28:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:30,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:30,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:30,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:30,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 17:28:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:30,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 17:28:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:30,908 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 17:28:30,996 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 17:28:30,997 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 23 treesize of output 18 [2022-12-13 17:28:31,061 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 17:28:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:31,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:45,289 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 14 treesize of output 12 [2022-12-13 17:28:45,291 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 22 treesize of output 20 [2022-12-13 17:28:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:28:45,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848598126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:45,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:45,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 32 [2022-12-13 17:28:45,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320987617] [2022-12-13 17:28:45,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:45,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 17:28:45,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 17:28:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=888, Unknown=7, NotChecked=0, Total=992 [2022-12-13 17:28:45,365 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 17:28:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:46,538 INFO L93 Difference]: Finished difference Result 157 states and 177 transitions. [2022-12-13 17:28:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 17:28:46,539 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 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 31 [2022-12-13 17:28:46,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:46,540 INFO L225 Difference]: With dead ends: 157 [2022-12-13 17:28:46,540 INFO L226 Difference]: Without dead ends: 157 [2022-12-13 17:28:46,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=610, Invalid=3673, Unknown=7, NotChecked=0, Total=4290 [2022-12-13 17:28:46,542 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 353 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:46,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 239 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:28:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-12-13 17:28:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 106. [2022-12-13 17:28:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.21) internal successors, (121), 105 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 17:28:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2022-12-13 17:28:46,545 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 31 [2022-12-13 17:28:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:46,545 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2022-12-13 17:28:46,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 17:28:46,545 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2022-12-13 17:28:46,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 17:28:46,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:46,545 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 17:28:46,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 17:28:46,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 17:28:46,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash 484636092, now seen corresponding path program 1 times [2022-12-13 17:28:46,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:46,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824792287] [2022-12-13 17:28:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:46,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:46,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:46,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824792287] [2022-12-13 17:28:46,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824792287] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:46,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732310007] [2022-12-13 17:28:46,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:46,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:46,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:46,917 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:46,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 17:28:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 17:28:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:47,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:47,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732310007] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:47,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:47,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-12-13 17:28:47,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677574665] [2022-12-13 17:28:47,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:47,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:28:47,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:47,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:28:47,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:28:47,060 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:47,348 INFO L93 Difference]: Finished difference Result 169 states and 184 transitions. [2022-12-13 17:28:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 17:28:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-13 17:28:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:47,349 INFO L225 Difference]: With dead ends: 169 [2022-12-13 17:28:47,349 INFO L226 Difference]: Without dead ends: 169 [2022-12-13 17:28:47,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:28:47,350 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 228 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:47,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 143 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-12-13 17:28:47,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 147. [2022-12-13 17:28:47,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.2253521126760563) internal successors, (174), 146 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:47,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2022-12-13 17:28:47,354 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 37 [2022-12-13 17:28:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:47,354 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2022-12-13 17:28:47,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2022-12-13 17:28:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 17:28:47,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:47,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:47,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 17:28:47,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 17:28:47,557 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2032716941, now seen corresponding path program 1 times [2022-12-13 17:28:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:47,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866972624] [2022-12-13 17:28:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:47,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:28:47,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:47,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866972624] [2022-12-13 17:28:47,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866972624] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:47,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766365928] [2022-12-13 17:28:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:47,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:47,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:47,831 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:47,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 17:28:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:47,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 17:28:47,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:48,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:48,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 17:28:48,035 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:28:48,035 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 11 treesize of output 11 [2022-12-13 17:28:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:48,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:52,270 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 53 treesize of output 49 [2022-12-13 17:28:52,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:28:52,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-12-13 17:28:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:52,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766365928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:52,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:52,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-12-13 17:28:52,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113705190] [2022-12-13 17:28:52,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:52,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:28:52,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:52,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:28:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:28:52,428 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 17:28:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:52,746 INFO L93 Difference]: Finished difference Result 242 states and 291 transitions. [2022-12-13 17:28:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 17:28:52,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 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 17:28:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:52,748 INFO L225 Difference]: With dead ends: 242 [2022-12-13 17:28:52,749 INFO L226 Difference]: Without dead ends: 242 [2022-12-13 17:28:52,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:28:52,749 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 285 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:52,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 179 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-12-13 17:28:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 162. [2022-12-13 17:28:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.2356687898089171) internal successors, (194), 161 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 17:28:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 194 transitions. [2022-12-13 17:28:52,752 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 194 transitions. Word has length 41 [2022-12-13 17:28:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:52,752 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 194 transitions. [2022-12-13 17:28:52,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 7.117647058823529) internal successors, (121), 18 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 17:28:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 194 transitions. [2022-12-13 17:28:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 17:28:52,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:52,753 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:52,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:52,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 17:28:52,954 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1410284307, now seen corresponding path program 1 times [2022-12-13 17:28:52,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:52,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089785164] [2022-12-13 17:28:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:53,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:53,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089785164] [2022-12-13 17:28:53,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089785164] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:53,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657923674] [2022-12-13 17:28:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:53,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:53,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:53,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:53,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 17:28:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:53,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 17:28:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:53,299 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-13 17:28:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:53,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:53,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657923674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:53,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:53,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2022-12-13 17:28:53,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142211992] [2022-12-13 17:28:53,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:53,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:28:53,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:28:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:28:53,708 INFO L87 Difference]: Start difference. First operand 162 states and 194 transitions. Second operand has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 16 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 17:28:54,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:54,392 INFO L93 Difference]: Finished difference Result 289 states and 326 transitions. [2022-12-13 17:28:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 17:28:54,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 16 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) Word has length 42 [2022-12-13 17:28:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:54,395 INFO L225 Difference]: With dead ends: 289 [2022-12-13 17:28:54,395 INFO L226 Difference]: Without dead ends: 289 [2022-12-13 17:28:54,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=879, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 17:28:54,395 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 504 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:54,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 331 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:28:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-13 17:28:54,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 183. [2022-12-13 17:28:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.2415730337078652) internal successors, (221), 182 states have internal predecessors, (221), 0 states have call successors, (0), 0 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 17:28:54,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 221 transitions. [2022-12-13 17:28:54,399 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 221 transitions. Word has length 42 [2022-12-13 17:28:54,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:54,399 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 221 transitions. [2022-12-13 17:28:54,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.133333333333334) internal successors, (92), 16 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 17:28:54,399 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 221 transitions. [2022-12-13 17:28:54,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 17:28:54,400 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:54,400 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:28:54,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 17:28:54,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:54,601 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:54,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:54,602 INFO L85 PathProgramCache]: Analyzing trace with hash 183114832, now seen corresponding path program 2 times [2022-12-13 17:28:54,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:54,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925688447] [2022-12-13 17:28:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:54,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:54,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:54,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925688447] [2022-12-13 17:28:54,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925688447] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:54,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323787601] [2022-12-13 17:28:54,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:28:54,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:54,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:54,719 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:54,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 17:28:54,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:28:54,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:54,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:28:54,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:54,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 17:28:54,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323787601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:54,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:54,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-12-13 17:28:54,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525469590] [2022-12-13 17:28:54,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:54,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:28:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:54,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:28:54,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:28:54,936 INFO L87 Difference]: Start difference. First operand 183 states and 221 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:55,118 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2022-12-13 17:28:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 17:28:55,118 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-13 17:28:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:55,120 INFO L225 Difference]: With dead ends: 187 [2022-12-13 17:28:55,120 INFO L226 Difference]: Without dead ends: 187 [2022-12-13 17:28:55,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2022-12-13 17:28:55,121 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 196 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:55,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 202 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:55,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-13 17:28:55,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 171. [2022-12-13 17:28:55,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.2108433734939759) internal successors, (201), 170 states have internal predecessors, (201), 0 states have call successors, (0), 0 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 17:28:55,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2022-12-13 17:28:55,125 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 46 [2022-12-13 17:28:55,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:55,126 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2022-12-13 17:28:55,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:28:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2022-12-13 17:28:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 17:28:55,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:55,126 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-12-13 17:28:55,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 17:28:55,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:55,327 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash 457132991, now seen corresponding path program 2 times [2022-12-13 17:28:55,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:55,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810851790] [2022-12-13 17:28:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:55,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:28:55,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:55,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810851790] [2022-12-13 17:28:55,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810851790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:55,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060886233] [2022-12-13 17:28:55,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:28:55,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:55,422 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:55,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 17:28:55,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:28:55,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:55,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 17:28:55,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:28:55,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:28:55,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060886233] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:55,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:55,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 17:28:55,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982338374] [2022-12-13 17:28:55,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:55,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 17:28:55,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:55,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 17:28:55,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:28:55,635 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 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 17:28:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:55,750 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2022-12-13 17:28:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 17:28:55,750 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 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) Word has length 47 [2022-12-13 17:28:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:55,751 INFO L225 Difference]: With dead ends: 171 [2022-12-13 17:28:55,751 INFO L226 Difference]: Without dead ends: 171 [2022-12-13 17:28:55,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-12-13 17:28:55,752 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 67 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:55,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 195 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-13 17:28:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2022-12-13 17:28:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.1847133757961783) internal successors, (186), 161 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 17:28:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 186 transitions. [2022-12-13 17:28:55,762 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 186 transitions. Word has length 47 [2022-12-13 17:28:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:55,762 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 186 transitions. [2022-12-13 17:28:55,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 11 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 17:28:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 186 transitions. [2022-12-13 17:28:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 17:28:55,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:55,763 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-12-13 17:28:55,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 17:28:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 17:28:55,965 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:55,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:55,966 INFO L85 PathProgramCache]: Analyzing trace with hash -269976254, now seen corresponding path program 3 times [2022-12-13 17:28:55,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:55,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767690293] [2022-12-13 17:28:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:55,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:56,247 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 17:28:56,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:56,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767690293] [2022-12-13 17:28:56,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767690293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:56,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517876535] [2022-12-13 17:28:56,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:28:56,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:56,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:56,249 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:56,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 17:28:56,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:28:56,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:56,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 17:28:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:56,330 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:28:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 17:28:56,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 17:28:56,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517876535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:56,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:56,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2022-12-13 17:28:56,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051143817] [2022-12-13 17:28:56,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:56,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:28:56,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:56,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:28:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:28:56,689 INFO L87 Difference]: Start difference. First operand 162 states and 186 transitions. Second operand has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:28:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:57,269 INFO L93 Difference]: Finished difference Result 225 states and 258 transitions. [2022-12-13 17:28:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 17:28:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 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 17:28:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:57,270 INFO L225 Difference]: With dead ends: 225 [2022-12-13 17:28:57,270 INFO L226 Difference]: Without dead ends: 225 [2022-12-13 17:28:57,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 17:28:57,272 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 350 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:57,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 187 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:28:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-12-13 17:28:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 157. [2022-12-13 17:28:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 153 states have (on average 1.1633986928104576) internal successors, (178), 156 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 17:28:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 178 transitions. [2022-12-13 17:28:57,276 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 178 transitions. Word has length 52 [2022-12-13 17:28:57,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:57,276 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 178 transitions. [2022-12-13 17:28:57,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 25 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 17:28:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 178 transitions. [2022-12-13 17:28:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 17:28:57,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:57,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-13 17:28:57,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 17:28:57,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:57,478 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:57,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1642790799, now seen corresponding path program 2 times [2022-12-13 17:28:57,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:57,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158132038] [2022-12-13 17:28:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:57,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 17:28:57,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158132038] [2022-12-13 17:28:57,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158132038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486947365] [2022-12-13 17:28:57,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:28:57,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:57,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:57,634 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:57,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 17:28:57,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:28:57,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:57,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:28:57,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 17:28:57,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:28:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 17:28:57,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486947365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:28:57,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:28:57,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-12-13 17:28:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584748347] [2022-12-13 17:28:57,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:28:57,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 17:28:57,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:28:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 17:28:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-13 17:28:57,819 INFO L87 Difference]: Start difference. First operand 157 states and 178 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 17:28:57,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:28:57,932 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2022-12-13 17:28:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 17:28:57,932 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 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 17:28:57,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:28:57,933 INFO L225 Difference]: With dead ends: 185 [2022-12-13 17:28:57,933 INFO L226 Difference]: Without dead ends: 185 [2022-12-13 17:28:57,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:28:57,933 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 75 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:28:57,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 233 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:28:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-13 17:28:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2022-12-13 17:28:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 169 states have (on average 1.1479289940828403) internal successors, (194), 172 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 17:28:57,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2022-12-13 17:28:57,936 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 56 [2022-12-13 17:28:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:28:57,936 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2022-12-13 17:28:57,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 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 17:28:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2022-12-13 17:28:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 17:28:57,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:28:57,937 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-13 17:28:57,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 17:28:58,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 17:28:58,138 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:28:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:28:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash 74449076, now seen corresponding path program 3 times [2022-12-13 17:28:58,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:28:58,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260729257] [2022-12-13 17:28:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:28:58,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:28:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:28:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 17:28:58,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:28:58,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260729257] [2022-12-13 17:28:58,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260729257] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:28:58,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174489273] [2022-12-13 17:28:58,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:28:58,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:28:58,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:28:58,621 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:28:58,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 17:28:58,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 17:28:58,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:28:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-13 17:28:58,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:28:58,737 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:28:58,740 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:28:58,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:28:58,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:28:58,768 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:28:58,768 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 11 treesize of output 11 [2022-12-13 17:28:58,852 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:28:58,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-12-13 17:28:58,864 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:28:58,865 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 11 treesize of output 11 [2022-12-13 17:28:59,022 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:28:59,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-12-13 17:28:59,034 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:28:59,034 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 11 treesize of output 11 [2022-12-13 17:28:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 17:28:59,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:05,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:29:05,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-12-13 17:29:08,073 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:29:08,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 68 [2022-12-13 17:29:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 17:29:08,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174489273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:08,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:08,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2022-12-13 17:29:08,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790380508] [2022-12-13 17:29:08,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:08,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:29:08,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:29:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:29:08,289 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 17:29:11,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:11,599 INFO L93 Difference]: Finished difference Result 201 states and 218 transitions. [2022-12-13 17:29:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 17:29:11,599 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-12-13 17:29:11,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:11,600 INFO L225 Difference]: With dead ends: 201 [2022-12-13 17:29:11,600 INFO L226 Difference]: Without dead ends: 201 [2022-12-13 17:29:11,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 17:29:11,601 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 355 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:11,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 324 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 17:29:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-13 17:29:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 193. [2022-12-13 17:29:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 192 states have internal predecessors, (216), 0 states have call successors, (0), 0 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 17:29:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 216 transitions. [2022-12-13 17:29:11,603 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 216 transitions. Word has length 60 [2022-12-13 17:29:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:11,603 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 216 transitions. [2022-12-13 17:29:11,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.607142857142857) internal successors, (157), 29 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 17:29:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 216 transitions. [2022-12-13 17:29:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 17:29:11,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:11,604 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2022-12-13 17:29:11,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-13 17:29:11,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 17:29:11,805 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:11,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:11,806 INFO L85 PathProgramCache]: Analyzing trace with hash -809246151, now seen corresponding path program 1 times [2022-12-13 17:29:11,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:11,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309459279] [2022-12-13 17:29:11,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:11,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 33 proven. 92 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 17:29:12,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:12,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309459279] [2022-12-13 17:29:12,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309459279] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:12,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197291118] [2022-12-13 17:29:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:12,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:12,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:12,121 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:12,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 17:29:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:12,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 17:29:12,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:12,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:29:12,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 17:29:12,362 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:29:12,362 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 11 treesize of output 11 [2022-12-13 17:29:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:29:12,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:14,584 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 53 treesize of output 49 [2022-12-13 17:29:14,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:29:14,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-12-13 17:29:14,786 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 59 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:29:14,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197291118] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:14,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:14,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-12-13 17:29:14,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414621648] [2022-12-13 17:29:14,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:14,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 17:29:14,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 17:29:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-12-13 17:29:14,788 INFO L87 Difference]: Start difference. First operand 193 states and 216 transitions. Second operand has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 17:29:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:15,219 INFO L93 Difference]: Finished difference Result 302 states and 340 transitions. [2022-12-13 17:29:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 17:29:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-12-13 17:29:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:15,220 INFO L225 Difference]: With dead ends: 302 [2022-12-13 17:29:15,221 INFO L226 Difference]: Without dead ends: 302 [2022-12-13 17:29:15,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=297, Invalid=1109, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 17:29:15,221 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 276 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:15,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 337 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:29:15,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-12-13 17:29:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 210. [2022-12-13 17:29:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.1553398058252426) internal successors, (238), 209 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 238 transitions. [2022-12-13 17:29:15,224 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 238 transitions. Word has length 75 [2022-12-13 17:29:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:15,224 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 238 transitions. [2022-12-13 17:29:15,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 8.695652173913043) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 17:29:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 238 transitions. [2022-12-13 17:29:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-13 17:29:15,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:15,225 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2022-12-13 17:29:15,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 17:29:15,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:15,425 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:15,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:15,426 INFO L85 PathProgramCache]: Analyzing trace with hash 683173057, now seen corresponding path program 1 times [2022-12-13 17:29:15,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:15,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291494055] [2022-12-13 17:29:15,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:15,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:29:15,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:15,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291494055] [2022-12-13 17:29:15,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291494055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:15,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546695964] [2022-12-13 17:29:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:15,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:15,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:15,643 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:15,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 17:29:15,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 17:29:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:15,855 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-12-13 17:29:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:29:16,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:29:16,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546695964] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:16,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:16,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 20 [2022-12-13 17:29:16,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701851818] [2022-12-13 17:29:16,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:16,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:29:16,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:29:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:29:16,472 INFO L87 Difference]: Start difference. First operand 210 states and 238 transitions. Second operand has 21 states, 20 states have (on average 7.35) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:18,251 INFO L93 Difference]: Finished difference Result 431 states and 481 transitions. [2022-12-13 17:29:18,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 17:29:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 7.35) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-12-13 17:29:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:18,254 INFO L225 Difference]: With dead ends: 431 [2022-12-13 17:29:18,254 INFO L226 Difference]: Without dead ends: 431 [2022-12-13 17:29:18,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=517, Invalid=2239, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:29:18,256 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 750 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:18,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 496 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 17:29:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-12-13 17:29:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 280. [2022-12-13 17:29:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 276 states have (on average 1.184782608695652) internal successors, (327), 279 states have internal predecessors, (327), 0 states have call successors, (0), 0 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 17:29:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 327 transitions. [2022-12-13 17:29:18,259 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 327 transitions. Word has length 76 [2022-12-13 17:29:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:18,260 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 327 transitions. [2022-12-13 17:29:18,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 7.35) internal successors, (147), 21 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:18,260 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 327 transitions. [2022-12-13 17:29:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-13 17:29:18,260 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:18,260 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2022-12-13 17:29:18,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 17:29:18,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:18,461 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:18,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1737117148, now seen corresponding path program 2 times [2022-12-13 17:29:18,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:18,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161617391] [2022-12-13 17:29:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:18,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 13 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:29:18,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:18,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161617391] [2022-12-13 17:29:18,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161617391] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:18,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457780335] [2022-12-13 17:29:18,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:29:18,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:18,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:18,589 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:18,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 17:29:18,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:29:18,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:18,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:29:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:29:18,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 24 proven. 126 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 17:29:18,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457780335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:18,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:18,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-12-13 17:29:18,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770369850] [2022-12-13 17:29:18,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:18,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 17:29:18,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:18,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 17:29:18,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:29:18,916 INFO L87 Difference]: Start difference. First operand 280 states and 327 transitions. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:19,160 INFO L93 Difference]: Finished difference Result 281 states and 320 transitions. [2022-12-13 17:29:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:29:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-12-13 17:29:19,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:19,162 INFO L225 Difference]: With dead ends: 281 [2022-12-13 17:29:19,162 INFO L226 Difference]: Without dead ends: 281 [2022-12-13 17:29:19,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 147 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2022-12-13 17:29:19,163 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 334 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:19,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 226 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:29:19,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-12-13 17:29:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 263. [2022-12-13 17:29:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.1583011583011582) internal successors, (300), 262 states have internal predecessors, (300), 0 states have call successors, (0), 0 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 17:29:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 300 transitions. [2022-12-13 17:29:19,168 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 300 transitions. Word has length 80 [2022-12-13 17:29:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:19,168 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 300 transitions. [2022-12-13 17:29:19,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:19,168 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 300 transitions. [2022-12-13 17:29:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-13 17:29:19,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:19,169 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2022-12-13 17:29:19,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 17:29:19,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 17:29:19,370 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:19,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1306836429, now seen corresponding path program 3 times [2022-12-13 17:29:19,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:19,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375790222] [2022-12-13 17:29:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:19,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 202 proven. 78 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 17:29:19,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375790222] [2022-12-13 17:29:19,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375790222] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:19,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271987672] [2022-12-13 17:29:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:29:19,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:19,501 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:19,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 17:29:19,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 17:29:19,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 17:29:19,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:29:19,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 17:29:19,636 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:29:19,637 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 11 treesize of output 11 [2022-12-13 17:29:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 120 proven. 3 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-12-13 17:29:19,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 111 proven. 12 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-12-13 17:29:19,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271987672] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:19,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:19,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-12-13 17:29:19,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686324707] [2022-12-13 17:29:19,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:19,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:29:19,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:19,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:29:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:29:19,931 INFO L87 Difference]: Start difference. First operand 263 states and 300 transitions. Second operand has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:20,561 INFO L93 Difference]: Finished difference Result 264 states and 290 transitions. [2022-12-13 17:29:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 17:29:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-12-13 17:29:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:20,562 INFO L225 Difference]: With dead ends: 264 [2022-12-13 17:29:20,562 INFO L226 Difference]: Without dead ends: 264 [2022-12-13 17:29:20,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=432, Invalid=1548, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 17:29:20,563 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 203 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:20,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 274 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:29:20,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-13 17:29:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2022-12-13 17:29:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 258 states have (on average 1.12015503875969) internal successors, (289), 260 states have internal predecessors, (289), 0 states have call successors, (0), 0 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 17:29:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 289 transitions. [2022-12-13 17:29:20,566 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 289 transitions. Word has length 109 [2022-12-13 17:29:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:20,566 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 289 transitions. [2022-12-13 17:29:20,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.523809523809524) internal successors, (137), 21 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 289 transitions. [2022-12-13 17:29:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-13 17:29:20,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:20,567 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1] [2022-12-13 17:29:20,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 17:29:20,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:20,767 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:20,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1962904546, now seen corresponding path program 2 times [2022-12-13 17:29:20,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:20,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576188098] [2022-12-13 17:29:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:20,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 186 proven. 134 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 17:29:20,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576188098] [2022-12-13 17:29:20,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576188098] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:20,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130701373] [2022-12-13 17:29:20,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:29:20,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:20,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:20,938 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:20,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 17:29:21,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 17:29:21,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:21,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 17:29:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:21,103 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:29:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-12-13 17:29:21,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-12-13 17:29:21,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130701373] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:21,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:21,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2022-12-13 17:29:21,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66194380] [2022-12-13 17:29:21,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:21,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 17:29:21,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 17:29:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-12-13 17:29:21,574 INFO L87 Difference]: Start difference. First operand 261 states and 289 transitions. Second operand has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:22,141 INFO L93 Difference]: Finished difference Result 295 states and 315 transitions. [2022-12-13 17:29:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 17:29:22,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-12-13 17:29:22,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:22,142 INFO L225 Difference]: With dead ends: 295 [2022-12-13 17:29:22,142 INFO L226 Difference]: Without dead ends: 295 [2022-12-13 17:29:22,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 17:29:22,143 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:22,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 255 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:29:22,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-12-13 17:29:22,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 220. [2022-12-13 17:29:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 218 states have (on average 1.073394495412844) internal successors, (234), 219 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 17:29:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 234 transitions. [2022-12-13 17:29:22,146 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 234 transitions. Word has length 115 [2022-12-13 17:29:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:22,146 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 234 transitions. [2022-12-13 17:29:22,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.11111111111111) internal successors, (146), 18 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:22,147 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 234 transitions. [2022-12-13 17:29:22,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-13 17:29:22,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:22,148 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:22,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 17:29:22,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 17:29:22,349 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:22,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1985613403, now seen corresponding path program 1 times [2022-12-13 17:29:22,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:22,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047750941] [2022-12-13 17:29:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:22,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:22,627 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 539 proven. 87 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-12-13 17:29:22,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:22,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047750941] [2022-12-13 17:29:22,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047750941] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:22,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291277316] [2022-12-13 17:29:22,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:22,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:22,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:22,628 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:22,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 17:29:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:22,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 17:29:22,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 631 proven. 130 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-12-13 17:29:22,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 631 proven. 130 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-12-13 17:29:23,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291277316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:23,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:23,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-12-13 17:29:23,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869280566] [2022-12-13 17:29:23,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:23,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 17:29:23,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:23,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 17:29:23,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-13 17:29:23,044 INFO L87 Difference]: Start difference. First operand 220 states and 234 transitions. Second operand has 19 states, 19 states have (on average 9.157894736842104) internal successors, (174), 19 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:23,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:23,379 INFO L93 Difference]: Finished difference Result 247 states and 261 transitions. [2022-12-13 17:29:23,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 17:29:23,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 9.157894736842104) internal successors, (174), 19 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2022-12-13 17:29:23,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:23,380 INFO L225 Difference]: With dead ends: 247 [2022-12-13 17:29:23,380 INFO L226 Difference]: Without dead ends: 247 [2022-12-13 17:29:23,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 351 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 17:29:23,381 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 110 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:23,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 396 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:29:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-12-13 17:29:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 235. [2022-12-13 17:29:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 233 states have (on average 1.0686695278969958) internal successors, (249), 234 states have internal predecessors, (249), 0 states have call successors, (0), 0 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 17:29:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 249 transitions. [2022-12-13 17:29:23,383 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 249 transitions. Word has length 183 [2022-12-13 17:29:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:23,384 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 249 transitions. [2022-12-13 17:29:23,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.157894736842104) internal successors, (174), 19 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:29:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 249 transitions. [2022-12-13 17:29:23,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-12-13 17:29:23,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:23,384 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:23,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 17:29:23,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:23,586 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:23,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1035428845, now seen corresponding path program 2 times [2022-12-13 17:29:23,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:23,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11990635] [2022-12-13 17:29:23,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:23,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 602 proven. 305 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 17:29:23,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:23,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11990635] [2022-12-13 17:29:23,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11990635] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:23,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600131912] [2022-12-13 17:29:23,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:29:23,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:23,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:23,862 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:23,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 17:29:24,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:29:24,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:24,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:29:24,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 648 proven. 259 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 17:29:24,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 648 proven. 259 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-12-13 17:29:24,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600131912] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:24,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:24,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-12-13 17:29:24,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959892258] [2022-12-13 17:29:24,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:24,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 17:29:24,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:24,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 17:29:24,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-12-13 17:29:24,350 INFO L87 Difference]: Start difference. First operand 235 states and 249 transitions. Second operand has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 17:29:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:24,634 INFO L93 Difference]: Finished difference Result 256 states and 270 transitions. [2022-12-13 17:29:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 17:29:24,635 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 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 193 [2022-12-13 17:29:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:24,636 INFO L225 Difference]: With dead ends: 256 [2022-12-13 17:29:24,636 INFO L226 Difference]: Without dead ends: 256 [2022-12-13 17:29:24,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 371 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2022-12-13 17:29:24,637 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 91 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:24,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 523 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:29:24,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-12-13 17:29:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 247. [2022-12-13 17:29:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 245 states have (on average 1.0653061224489795) internal successors, (261), 246 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 17:29:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 261 transitions. [2022-12-13 17:29:24,641 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 261 transitions. Word has length 193 [2022-12-13 17:29:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:24,641 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 261 transitions. [2022-12-13 17:29:24,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.666666666666667) internal successors, (161), 21 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 17:29:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 261 transitions. [2022-12-13 17:29:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-12-13 17:29:24,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:24,641 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:29:24,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 17:29:24,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 17:29:24,842 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1941601421, now seen corresponding path program 3 times [2022-12-13 17:29:24,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:24,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289460083] [2022-12-13 17:29:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 686 proven. 334 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-12-13 17:29:25,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:25,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289460083] [2022-12-13 17:29:25,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289460083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:25,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953034913] [2022-12-13 17:29:25,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:29:25,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:25,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:25,118 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:25,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 17:29:25,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 17:29:25,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:25,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 17:29:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 476 proven. 34 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-12-13 17:29:25,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 476 proven. 34 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-12-13 17:29:25,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953034913] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:25,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:25,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2022-12-13 17:29:25,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164987002] [2022-12-13 17:29:25,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:25,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 17:29:25,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:25,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 17:29:25,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2022-12-13 17:29:25,626 INFO L87 Difference]: Start difference. First operand 247 states and 261 transitions. Second operand has 27 states, 27 states have (on average 8.481481481481481) internal successors, (229), 27 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 17:29:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:26,544 INFO L93 Difference]: Finished difference Result 434 states and 462 transitions. [2022-12-13 17:29:26,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 17:29:26,544 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 8.481481481481481) internal successors, (229), 27 states have internal predecessors, (229), 0 states have call successors, (0), 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 201 [2022-12-13 17:29:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:26,545 INFO L225 Difference]: With dead ends: 434 [2022-12-13 17:29:26,545 INFO L226 Difference]: Without dead ends: 434 [2022-12-13 17:29:26,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2022-12-13 17:29:26,546 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 566 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:26,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 484 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:29:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-12-13 17:29:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2022-12-13 17:29:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 415 states have (on average 1.074698795180723) internal successors, (446), 416 states have internal predecessors, (446), 0 states have call successors, (0), 0 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 17:29:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 446 transitions. [2022-12-13 17:29:26,550 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 446 transitions. Word has length 201 [2022-12-13 17:29:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:26,550 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 446 transitions. [2022-12-13 17:29:26,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 8.481481481481481) internal successors, (229), 27 states have internal predecessors, (229), 0 states have call successors, (0), 0 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 17:29:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 446 transitions. [2022-12-13 17:29:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-12-13 17:29:26,551 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:26,551 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 18, 18, 18, 18, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2022-12-13 17:29:26,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 17:29:26,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:26,753 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash 315042624, now seen corresponding path program 4 times [2022-12-13 17:29:26,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:26,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61685656] [2022-12-13 17:29:26,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:26,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 1211 proven. 583 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-13 17:29:27,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:27,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61685656] [2022-12-13 17:29:27,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61685656] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:27,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652198587] [2022-12-13 17:29:27,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:29:27,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:27,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:27,165 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:27,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 17:29:54,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:29:54,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:29:54,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:29:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:29:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 1290 proven. 49 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2022-12-13 17:29:54,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:29:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 1290 proven. 49 refuted. 0 times theorem prover too weak. 708 trivial. 0 not checked. [2022-12-13 17:29:54,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652198587] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:29:54,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:29:54,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2022-12-13 17:29:54,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312109291] [2022-12-13 17:29:54,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:29:54,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 17:29:54,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:29:54,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 17:29:54,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-12-13 17:29:54,523 INFO L87 Difference]: Start difference. First operand 417 states and 446 transitions. Second operand has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 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 17:29:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:29:55,397 INFO L93 Difference]: Finished difference Result 452 states and 481 transitions. [2022-12-13 17:29:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 17:29:55,398 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 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 249 [2022-12-13 17:29:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:29:55,399 INFO L225 Difference]: With dead ends: 452 [2022-12-13 17:29:55,399 INFO L226 Difference]: Without dead ends: 452 [2022-12-13 17:29:55,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 478 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1131, Invalid=3425, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 17:29:55,400 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 196 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:29:55,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 572 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 17:29:55,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-12-13 17:29:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 437. [2022-12-13 17:29:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 435 states have (on average 1.071264367816092) internal successors, (466), 436 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 17:29:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 466 transitions. [2022-12-13 17:29:55,404 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 466 transitions. Word has length 249 [2022-12-13 17:29:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:29:55,404 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 466 transitions. [2022-12-13 17:29:55,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 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 17:29:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 466 transitions. [2022-12-13 17:29:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-12-13 17:29:55,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:29:55,405 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2022-12-13 17:29:55,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 17:29:55,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 17:29:55,606 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:29:55,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:29:55,606 INFO L85 PathProgramCache]: Analyzing trace with hash 464852166, now seen corresponding path program 5 times [2022-12-13 17:29:55,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:29:55,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833726421] [2022-12-13 17:29:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:29:55,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:29:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:29:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1387 proven. 567 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-12-13 17:29:55,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:29:55,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833726421] [2022-12-13 17:29:55,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833726421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:29:55,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994833937] [2022-12-13 17:29:55,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:29:55,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:29:55,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:29:55,960 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:29:55,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 17:30:01,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 17:30:01,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:30:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 17:30:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1460 proven. 494 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-12-13 17:30:01,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 1479 proven. 475 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-12-13 17:30:01,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994833937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:01,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:01,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 24 [2022-12-13 17:30:01,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815244117] [2022-12-13 17:30:01,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:01,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 17:30:01,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:01,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 17:30:01,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-12-13 17:30:01,509 INFO L87 Difference]: Start difference. First operand 437 states and 466 transitions. Second operand has 24 states, 24 states have (on average 8.333333333333334) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 17:30:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:30:02,038 INFO L93 Difference]: Finished difference Result 448 states and 476 transitions. [2022-12-13 17:30:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 17:30:02,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.333333333333334) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 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 257 [2022-12-13 17:30:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:30:02,039 INFO L225 Difference]: With dead ends: 448 [2022-12-13 17:30:02,039 INFO L226 Difference]: Without dead ends: 448 [2022-12-13 17:30:02,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 506 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=742, Invalid=2014, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 17:30:02,040 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 115 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:30:02,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 444 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:30:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-12-13 17:30:02,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 442. [2022-12-13 17:30:02,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 440 states have (on average 1.0681818181818181) internal successors, (470), 441 states have internal predecessors, (470), 0 states have call successors, (0), 0 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 17:30:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 470 transitions. [2022-12-13 17:30:02,043 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 470 transitions. Word has length 257 [2022-12-13 17:30:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:30:02,043 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 470 transitions. [2022-12-13 17:30:02,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.333333333333334) internal successors, (200), 24 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 17:30:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 470 transitions. [2022-12-13 17:30:02,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-12-13 17:30:02,044 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:30:02,044 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2022-12-13 17:30:02,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 17:30:02,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:02,246 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:30:02,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash -948471375, now seen corresponding path program 6 times [2022-12-13 17:30:02,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:02,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611717864] [2022-12-13 17:30:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1030 proven. 995 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-12-13 17:30:02,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611717864] [2022-12-13 17:30:02,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611717864] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522104430] [2022-12-13 17:30:02,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:30:02,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:02,746 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:02,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 17:30:04,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-12-13 17:30:04,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:30:04,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 1146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:30:04,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1213 proven. 641 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-12-13 17:30:05,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1313 proven. 541 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-12-13 17:30:05,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522104430] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:05,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:05,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-12-13 17:30:05,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510170721] [2022-12-13 17:30:05,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:05,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 17:30:05,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:05,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 17:30:05,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 17:30:05,385 INFO L87 Difference]: Start difference. First operand 442 states and 470 transitions. Second operand has 36 states, 36 states have (on average 6.861111111111111) internal successors, (247), 36 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 17:30:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:30:06,662 INFO L93 Difference]: Finished difference Result 459 states and 487 transitions. [2022-12-13 17:30:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 17:30:06,662 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.861111111111111) internal successors, (247), 36 states have internal predecessors, (247), 0 states have call successors, (0), 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 262 [2022-12-13 17:30:06,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:30:06,665 INFO L225 Difference]: With dead ends: 459 [2022-12-13 17:30:06,665 INFO L226 Difference]: Without dead ends: 459 [2022-12-13 17:30:06,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 501 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1361, Invalid=4491, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 17:30:06,668 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 205 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 17:30:06,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 817 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1962 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 17:30:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-12-13 17:30:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 450. [2022-12-13 17:30:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 448 states have (on average 1.0669642857142858) internal successors, (478), 449 states have internal predecessors, (478), 0 states have call successors, (0), 0 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 17:30:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 478 transitions. [2022-12-13 17:30:06,676 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 478 transitions. Word has length 262 [2022-12-13 17:30:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:30:06,676 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 478 transitions. [2022-12-13 17:30:06,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.861111111111111) internal successors, (247), 36 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 17:30:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 478 transitions. [2022-12-13 17:30:06,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-12-13 17:30:06,677 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:30:06,677 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 2, 1, 1, 1] [2022-12-13 17:30:06,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 17:30:06,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 17:30:06,879 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:30:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:06,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1500764660, now seen corresponding path program 7 times [2022-12-13 17:30:06,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:06,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995456381] [2022-12-13 17:30:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:06,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2112 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-12-13 17:30:08,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:08,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995456381] [2022-12-13 17:30:08,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995456381] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:08,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390482623] [2022-12-13 17:30:08,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:30:08,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:08,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:08,966 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:08,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 17:30:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:09,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-13 17:30:09,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:30:09,175 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:30:09,179 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 17:30:09,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 17:30:09,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:30:09,209 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:30:09,210 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 11 treesize of output 11 [2022-12-13 17:30:09,287 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:30:09,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-12-13 17:30:09,296 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:30:09,296 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 11 treesize of output 11 [2022-12-13 17:30:09,441 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:30:09,441 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 11 treesize of output 11 [2022-12-13 17:30:09,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:30:09,648 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:30:09,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-12-13 17:30:09,656 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:30:09,656 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 11 treesize of output 11 [2022-12-13 17:30:09,858 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 17:30:09,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 18 [2022-12-13 17:30:09,866 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:30:09,866 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 11 treesize of output 11 [2022-12-13 17:30:10,091 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:30:10,091 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 11 treesize of output 11 [2022-12-13 17:30:10,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:30:10,404 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 17:30:10,404 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 11 treesize of output 11 [2022-12-13 17:30:10,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 17:30:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2022-12-13 17:30:10,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:30:16,902 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:30:23,022 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:30:23,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:30:23,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2022-12-13 17:30:27,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:30:27,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2022-12-13 17:30:34,558 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 17:30:34,583 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:30:34,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2022-12-13 17:30:35,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:30:35,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2022-12-13 17:30:37,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:30:37,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2022-12-13 17:30:40,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 17:30:40,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2022-12-13 17:30:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2022-12-13 17:30:40,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390482623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:30:40,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:30:40,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 15] total 62 [2022-12-13 17:30:40,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012072076] [2022-12-13 17:30:40,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:30:40,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 17:30:40,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:30:40,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 17:30:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3459, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 17:30:40,853 INFO L87 Difference]: Start difference. First operand 450 states and 478 transitions. Second operand has 63 states, 62 states have (on average 6.629032258064516) internal successors, (411), 63 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:30:48,955 INFO L93 Difference]: Finished difference Result 1408 states and 1515 transitions. [2022-12-13 17:30:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 17:30:48,955 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 6.629032258064516) internal successors, (411), 63 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-12-13 17:30:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:30:48,957 INFO L225 Difference]: With dead ends: 1408 [2022-12-13 17:30:48,957 INFO L226 Difference]: Without dead ends: 1408 [2022-12-13 17:30:48,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 495 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 35.9s TimeCoverageRelationStatistics Valid=1395, Invalid=6795, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 17:30:48,959 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 1257 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1257 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:30:48,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1257 Valid, 2543 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 17:30:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-12-13 17:30:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1399. [2022-12-13 17:30:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1399 states, 1397 states have (on average 1.0780243378668575) internal successors, (1506), 1398 states have internal predecessors, (1506), 0 states have call successors, (0), 0 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 17:30:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1506 transitions. [2022-12-13 17:30:48,970 INFO L78 Accepts]: Start accepts. Automaton has 1399 states and 1506 transitions. Word has length 266 [2022-12-13 17:30:48,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:30:48,970 INFO L495 AbstractCegarLoop]: Abstraction has 1399 states and 1506 transitions. [2022-12-13 17:30:48,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 6.629032258064516) internal successors, (411), 63 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 17:30:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1399 states and 1506 transitions. [2022-12-13 17:30:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-12-13 17:30:48,972 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:30:48,972 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 22, 22, 22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:30:48,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 17:30:49,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 17:30:49,173 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:30:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:30:49,174 INFO L85 PathProgramCache]: Analyzing trace with hash -384764090, now seen corresponding path program 4 times [2022-12-13 17:30:49,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:30:49,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803276844] [2022-12-13 17:30:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:30:49,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:30:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:30:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1517 proven. 367 refuted. 0 times theorem prover too weak. 1239 trivial. 0 not checked. [2022-12-13 17:30:49,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:30:49,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803276844] [2022-12-13 17:30:49,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803276844] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:30:49,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943191277] [2022-12-13 17:30:49,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:30:49,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:30:49,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:30:49,545 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:30:49,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 17:31:33,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:31:33,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:31:33,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 17:31:33,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:31:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1460 proven. 190 refuted. 0 times theorem prover too weak. 1473 trivial. 0 not checked. [2022-12-13 17:31:33,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:31:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3123 backedges. 1460 proven. 190 refuted. 0 times theorem prover too weak. 1473 trivial. 0 not checked. [2022-12-13 17:31:34,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943191277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:31:34,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:31:34,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 34 [2022-12-13 17:31:34,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392895669] [2022-12-13 17:31:34,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:31:34,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 17:31:34,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:31:34,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 17:31:34,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 17:31:34,118 INFO L87 Difference]: Start difference. First operand 1399 states and 1506 transitions. Second operand has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 17:31:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:31:34,972 INFO L93 Difference]: Finished difference Result 1732 states and 1849 transitions. [2022-12-13 17:31:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 17:31:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 0 states have call successors, (0), 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 304 [2022-12-13 17:31:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:31:34,979 INFO L225 Difference]: With dead ends: 1732 [2022-12-13 17:31:34,979 INFO L226 Difference]: Without dead ends: 1732 [2022-12-13 17:31:34,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 580 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=889, Invalid=4367, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 17:31:34,980 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 390 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 17:31:34,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 648 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 17:31:34,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2022-12-13 17:31:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1324. [2022-12-13 17:31:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1322 states have (on average 1.073373676248109) internal successors, (1419), 1323 states have internal predecessors, (1419), 0 states have call successors, (0), 0 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 17:31:34,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1419 transitions. [2022-12-13 17:31:34,998 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1419 transitions. Word has length 304 [2022-12-13 17:31:34,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:31:34,999 INFO L495 AbstractCegarLoop]: Abstraction has 1324 states and 1419 transitions. [2022-12-13 17:31:34,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.882352941176471) internal successors, (234), 34 states have internal predecessors, (234), 0 states have call successors, (0), 0 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 17:31:34,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1419 transitions. [2022-12-13 17:31:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2022-12-13 17:31:35,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:31:35,001 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 31, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:31:35,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 17:31:35,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:35,202 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:31:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:31:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1244124498, now seen corresponding path program 5 times [2022-12-13 17:31:35,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:31:35,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993692289] [2022-12-13 17:31:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:31:35,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:31:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:31:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 0 proven. 3942 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2022-12-13 17:31:35,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:31:35,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993692289] [2022-12-13 17:31:35,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993692289] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:31:35,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376044717] [2022-12-13 17:31:35,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:31:35,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:31:35,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:31:35,591 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:31:35,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 17:32:02,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-12-13 17:32:02,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:32:02,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 1402 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 17:32:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:32:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 1306 proven. 2866 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2022-12-13 17:32:03,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:32:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4625 backedges. 1306 proven. 2866 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2022-12-13 17:32:03,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376044717] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:32:03,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:32:03,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20, 20] total 33 [2022-12-13 17:32:03,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652498176] [2022-12-13 17:32:03,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:32:03,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 17:32:03,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:32:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 17:32:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 17:32:03,347 INFO L87 Difference]: Start difference. First operand 1324 states and 1419 transitions. Second operand has 33 states, 33 states have (on average 8.818181818181818) internal successors, (291), 33 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 17:32:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:32:04,501 INFO L93 Difference]: Finished difference Result 1227 states and 1306 transitions. [2022-12-13 17:32:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-13 17:32:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 8.818181818181818) internal successors, (291), 33 states have internal predecessors, (291), 0 states have call successors, (0), 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 364 [2022-12-13 17:32:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:32:04,504 INFO L225 Difference]: With dead ends: 1227 [2022-12-13 17:32:04,504 INFO L226 Difference]: Without dead ends: 1227 [2022-12-13 17:32:04,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 716 SyntacticMatches, 7 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2087, Invalid=8419, Unknown=0, NotChecked=0, Total=10506 [2022-12-13 17:32:04,505 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 768 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:32:04,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 514 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:32:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-12-13 17:32:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1194. [2022-12-13 17:32:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1192 states have (on average 1.066275167785235) internal successors, (1271), 1193 states have internal predecessors, (1271), 0 states have call successors, (0), 0 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 17:32:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1271 transitions. [2022-12-13 17:32:04,512 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1271 transitions. Word has length 364 [2022-12-13 17:32:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:32:04,513 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1271 transitions. [2022-12-13 17:32:04,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.818181818181818) internal successors, (291), 33 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 17:32:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1271 transitions. [2022-12-13 17:32:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2022-12-13 17:32:04,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:32:04,515 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 43, 43, 43, 40, 40, 40, 40, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:32:04,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 17:32:04,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 17:32:04,716 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:32:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:32:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash 569902066, now seen corresponding path program 6 times [2022-12-13 17:32:04,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:32:04,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811477306] [2022-12-13 17:32:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:32:04,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:32:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:32:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 5578 proven. 321 refuted. 0 times theorem prover too weak. 3071 trivial. 0 not checked. [2022-12-13 17:32:05,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:32:05,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811477306] [2022-12-13 17:32:05,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811477306] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:32:05,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487178645] [2022-12-13 17:32:05,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 17:32:05,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:32:05,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:32:05,636 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:32:05,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 17:32:50,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-13 17:32:50,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:32:50,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 2017 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 17:32:50,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:32:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 4306 proven. 2667 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2022-12-13 17:32:50,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:32:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 4306 proven. 2667 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2022-12-13 17:32:51,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487178645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:32:51,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:32:51,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 43 [2022-12-13 17:32:51,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042697208] [2022-12-13 17:32:51,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:32:51,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 17:32:51,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:32:51,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 17:32:51,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 17:32:51,063 INFO L87 Difference]: Start difference. First operand 1194 states and 1271 transitions. Second operand has 43 states, 43 states have (on average 7.651162790697675) internal successors, (329), 43 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 17:33:00,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:33:00,851 INFO L93 Difference]: Finished difference Result 7190 states and 7890 transitions. [2022-12-13 17:33:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 378 states. [2022-12-13 17:33:00,852 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 7.651162790697675) internal successors, (329), 43 states have internal predecessors, (329), 0 states have call successors, (0), 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 494 [2022-12-13 17:33:00,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:33:00,863 INFO L225 Difference]: With dead ends: 7190 [2022-12-13 17:33:00,863 INFO L226 Difference]: Without dead ends: 7190 [2022-12-13 17:33:00,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1384 GetRequests, 968 SyntacticMatches, 0 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72269 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=22227, Invalid=152079, Unknown=0, NotChecked=0, Total=174306 [2022-12-13 17:33:00,871 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 3451 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:33:00,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 865 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 17:33:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7190 states. [2022-12-13 17:33:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7190 to 4893. [2022-12-13 17:33:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4891 states have (on average 1.0811694949907995) internal successors, (5288), 4892 states have internal predecessors, (5288), 0 states have call successors, (0), 0 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 17:33:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 5288 transitions. [2022-12-13 17:33:00,909 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 5288 transitions. Word has length 494 [2022-12-13 17:33:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:33:00,909 INFO L495 AbstractCegarLoop]: Abstraction has 4893 states and 5288 transitions. [2022-12-13 17:33:00,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 7.651162790697675) internal successors, (329), 43 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 17:33:00,921 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 5288 transitions. [2022-12-13 17:33:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2022-12-13 17:33:00,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:33:00,927 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 92, 52, 52, 52, 52, 52, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:33:00,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 17:33:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 17:33:01,128 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:33:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:01,130 INFO L85 PathProgramCache]: Analyzing trace with hash 708196276, now seen corresponding path program 7 times [2022-12-13 17:33:01,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:01,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470812675] [2022-12-13 17:33:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25574 backedges. 12449 proven. 3405 refuted. 0 times theorem prover too weak. 9720 trivial. 0 not checked. [2022-12-13 17:33:02,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:02,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470812675] [2022-12-13 17:33:02,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470812675] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:33:02,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49680661] [2022-12-13 17:33:02,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 17:33:02,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:02,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:33:02,446 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:33:02,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 17:33:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 17:33:02,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:33:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 25574 backedges. 2496 proven. 49 refuted. 0 times theorem prover too weak. 23029 trivial. 0 not checked. [2022-12-13 17:33:02,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:33:03,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25574 backedges. 2496 proven. 49 refuted. 0 times theorem prover too weak. 23029 trivial. 0 not checked. [2022-12-13 17:33:03,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49680661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:33:03,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:33:03,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 25 [2022-12-13 17:33:03,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075876072] [2022-12-13 17:33:03,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:33:03,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:33:03,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:03,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:33:03,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:33:03,056 INFO L87 Difference]: Start difference. First operand 4893 states and 5288 transitions. Second operand has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 17:33:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:33:03,811 INFO L93 Difference]: Finished difference Result 1420 states and 1526 transitions. [2022-12-13 17:33:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 17:33:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 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 758 [2022-12-13 17:33:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:33:03,814 INFO L225 Difference]: With dead ends: 1420 [2022-12-13 17:33:03,814 INFO L226 Difference]: Without dead ends: 1420 [2022-12-13 17:33:03,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1580 GetRequests, 1505 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1214, Invalid=4042, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 17:33:03,815 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 623 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:33:03,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 316 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:33:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2022-12-13 17:33:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1420. [2022-12-13 17:33:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1418 states have (on average 1.076163610719323) internal successors, (1526), 1419 states have internal predecessors, (1526), 0 states have call successors, (0), 0 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 17:33:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1526 transitions. [2022-12-13 17:33:03,826 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1526 transitions. Word has length 758 [2022-12-13 17:33:03,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:33:03,827 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 1526 transitions. [2022-12-13 17:33:03,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.48) internal successors, (212), 25 states have internal predecessors, (212), 0 states have call successors, (0), 0 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 17:33:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1526 transitions. [2022-12-13 17:33:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 859 [2022-12-13 17:33:03,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:33:03,831 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 77, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2022-12-13 17:33:03,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 17:33:04,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 17:33:04,032 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:33:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1147359220, now seen corresponding path program 8 times [2022-12-13 17:33:04,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:04,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996770563] [2022-12-13 17:33:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:04,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 29771 backedges. 9074 proven. 429 refuted. 0 times theorem prover too weak. 20268 trivial. 0 not checked. [2022-12-13 17:33:05,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996770563] [2022-12-13 17:33:05,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996770563] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:33:05,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429738535] [2022-12-13 17:33:05,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:33:05,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:05,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:33:05,676 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:33:05,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 17:33:06,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:33:06,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:33:06,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 3389 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:33:06,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:33:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 29771 backedges. 18216 proven. 1184 refuted. 0 times theorem prover too weak. 10371 trivial. 0 not checked. [2022-12-13 17:33:06,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:33:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 29771 backedges. 18216 proven. 1184 refuted. 0 times theorem prover too weak. 10371 trivial. 0 not checked. [2022-12-13 17:33:06,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429738535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:33:06,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:33:06,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2022-12-13 17:33:06,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872473694] [2022-12-13 17:33:06,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:33:06,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 17:33:06,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:06,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 17:33:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 17:33:06,911 INFO L87 Difference]: Start difference. First operand 1420 states and 1526 transitions. Second operand has 35 states, 35 states have (on average 8.8) internal successors, (308), 35 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 17:33:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:33:08,224 INFO L93 Difference]: Finished difference Result 1501 states and 1605 transitions. [2022-12-13 17:33:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 17:33:08,225 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 8.8) internal successors, (308), 35 states have internal predecessors, (308), 0 states have call successors, (0), 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 858 [2022-12-13 17:33:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:33:08,227 INFO L225 Difference]: With dead ends: 1501 [2022-12-13 17:33:08,227 INFO L226 Difference]: Without dead ends: 1501 [2022-12-13 17:33:08,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1781 GetRequests, 1685 SyntacticMatches, 16 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1260, Invalid=5382, Unknown=0, NotChecked=0, Total=6642 [2022-12-13 17:33:08,228 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 195 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 17:33:08,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1219 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 17:33:08,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-12-13 17:33:08,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1465. [2022-12-13 17:33:08,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1463 states have (on average 1.072453861927546) internal successors, (1569), 1464 states have internal predecessors, (1569), 0 states have call successors, (0), 0 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 17:33:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 1569 transitions. [2022-12-13 17:33:08,237 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 1569 transitions. Word has length 858 [2022-12-13 17:33:08,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:33:08,237 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 1569 transitions. [2022-12-13 17:33:08,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 8.8) internal successors, (308), 35 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 17:33:08,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 1569 transitions. [2022-12-13 17:33:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 894 [2022-12-13 17:33:08,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:33:08,241 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 84, 84, 77, 77, 77, 77, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2022-12-13 17:33:08,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 17:33:08,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:08,442 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:33:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1704168183, now seen corresponding path program 9 times [2022-12-13 17:33:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:08,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150521199] [2022-12-13 17:33:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:08,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 32676 backedges. 19820 proven. 2329 refuted. 0 times theorem prover too weak. 10527 trivial. 0 not checked. [2022-12-13 17:33:10,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:10,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150521199] [2022-12-13 17:33:10,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150521199] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:33:10,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129595115] [2022-12-13 17:33:10,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:33:10,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:10,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:33:10,243 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:33:10,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 17:33:13,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-13 17:33:13,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:33:13,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 17:33:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:33:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 32676 backedges. 11542 proven. 16946 refuted. 0 times theorem prover too weak. 4188 trivial. 0 not checked. [2022-12-13 17:33:14,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:33:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32676 backedges. 11542 proven. 16946 refuted. 0 times theorem prover too weak. 4188 trivial. 0 not checked. [2022-12-13 17:33:15,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129595115] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:33:15,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:33:15,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 39 [2022-12-13 17:33:15,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148556527] [2022-12-13 17:33:15,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:33:15,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 17:33:15,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:33:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 17:33:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 17:33:15,037 INFO L87 Difference]: Start difference. First operand 1465 states and 1569 transitions. Second operand has 39 states, 39 states have (on average 8.205128205128204) internal successors, (320), 39 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 17:33:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:33:15,706 INFO L93 Difference]: Finished difference Result 1493 states and 1590 transitions. [2022-12-13 17:33:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 17:33:15,706 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 8.205128205128204) internal successors, (320), 39 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) Word has length 893 [2022-12-13 17:33:15,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:33:15,708 INFO L225 Difference]: With dead ends: 1493 [2022-12-13 17:33:15,708 INFO L226 Difference]: Without dead ends: 1493 [2022-12-13 17:33:15,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1832 GetRequests, 1757 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=958, Invalid=3464, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 17:33:15,709 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 142 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:33:15,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1009 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:33:15,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-12-13 17:33:15,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1481. [2022-12-13 17:33:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1479 states have (on average 1.0669371196754565) internal successors, (1578), 1480 states have internal predecessors, (1578), 0 states have call successors, (0), 0 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 17:33:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1578 transitions. [2022-12-13 17:33:15,718 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1578 transitions. Word has length 893 [2022-12-13 17:33:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:33:15,718 INFO L495 AbstractCegarLoop]: Abstraction has 1481 states and 1578 transitions. [2022-12-13 17:33:15,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 8.205128205128204) internal successors, (320), 39 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 17:33:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1578 transitions. [2022-12-13 17:33:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 922 [2022-12-13 17:33:15,723 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:33:15,724 INFO L195 NwaCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 84, 84, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2022-12-13 17:33:15,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 17:33:15,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:15,925 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:33:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:33:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1721483028, now seen corresponding path program 10 times [2022-12-13 17:33:15,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:33:15,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277913229] [2022-12-13 17:33:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:33:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:33:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:33:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 35021 backedges. 11088 proven. 552 refuted. 0 times theorem prover too weak. 23381 trivial. 0 not checked. [2022-12-13 17:33:17,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:33:17,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277913229] [2022-12-13 17:33:17,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277913229] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:33:17,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023320261] [2022-12-13 17:33:17,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 17:33:17,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:33:17,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:33:17,843 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:33:17,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 17:40:02,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 17:40:02,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:40:02,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 3592 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 17:40:02,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:40:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 35021 backedges. 26695 proven. 6010 refuted. 0 times theorem prover too weak. 2316 trivial. 0 not checked. [2022-12-13 17:40:03,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:40:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 35021 backedges. 26695 proven. 6010 refuted. 0 times theorem prover too weak. 2316 trivial. 0 not checked. [2022-12-13 17:40:04,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023320261] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:40:04,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:40:04,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 27] total 59 [2022-12-13 17:40:04,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443978933] [2022-12-13 17:40:04,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:40:04,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-12-13 17:40:04,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:40:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-12-13 17:40:04,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=2911, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 17:40:04,130 INFO L87 Difference]: Start difference. First operand 1481 states and 1578 transitions. Second operand has 59 states, 59 states have (on average 9.661016949152541) internal successors, (570), 59 states have internal predecessors, (570), 0 states have call successors, (0), 0 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 17:40:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:40:10,276 INFO L93 Difference]: Finished difference Result 1539 states and 1606 transitions. [2022-12-13 17:40:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-12-13 17:40:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 9.661016949152541) internal successors, (570), 59 states have internal predecessors, (570), 0 states have call successors, (0), 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 921 [2022-12-13 17:40:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:40:10,278 INFO L225 Difference]: With dead ends: 1539 [2022-12-13 17:40:10,278 INFO L226 Difference]: Without dead ends: 1539 [2022-12-13 17:40:10,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2038 GetRequests, 1795 SyntacticMatches, 10 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16125 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=9434, Invalid=45556, Unknown=0, NotChecked=0, Total=54990 [2022-12-13 17:40:10,281 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 409 mSDsluCounter, 2302 mSDsCounter, 0 mSdLazyCounter, 6627 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 2488 SdHoareTripleChecker+Invalid, 6649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:40:10,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 2488 Invalid, 6649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6627 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 17:40:10,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-12-13 17:40:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1533. [2022-12-13 17:40:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1531 states have (on average 1.0450685826257349) internal successors, (1600), 1532 states have internal predecessors, (1600), 0 states have call successors, (0), 0 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 17:40:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 1600 transitions. [2022-12-13 17:40:10,290 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 1600 transitions. Word has length 921 [2022-12-13 17:40:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:40:10,290 INFO L495 AbstractCegarLoop]: Abstraction has 1533 states and 1600 transitions. [2022-12-13 17:40:10,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 9.661016949152541) internal successors, (570), 59 states have internal predecessors, (570), 0 states have call successors, (0), 0 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 17:40:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 1600 transitions. [2022-12-13 17:40:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2022-12-13 17:40:10,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:40:10,295 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 95, 90, 90, 90, 90, 90, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 2, 1, 1, 1] [2022-12-13 17:40:10,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 17:40:10,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-13 17:40:10,496 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 17:40:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:40:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash 476170769, now seen corresponding path program 11 times [2022-12-13 17:40:10,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:40:10,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572561888] [2022-12-13 17:40:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:40:10,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:40:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:40:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 41787 backedges. 14819 proven. 690 refuted. 0 times theorem prover too weak. 26278 trivial. 0 not checked. [2022-12-13 17:40:12,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:40:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572561888] [2022-12-13 17:40:12,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572561888] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:40:12,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614744258] [2022-12-13 17:40:12,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 17:40:12,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:40:12,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:40:12,635 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:40:12,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e075e5ea-d4d6-4b4f-bc33-905fdfb5e6c4/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process