./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8 --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 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 --- 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-e04fb08 [2022-11-16 11:35:10,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:35:10,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:35:10,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:35:10,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:35:10,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:35:10,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:35:10,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:35:10,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:35:10,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:35:10,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:35:10,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:35:10,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:35:10,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:35:10,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:35:10,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:35:10,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:35:10,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:35:10,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:35:10,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:35:10,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:35:10,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:35:10,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:35:10,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:35:10,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:35:10,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:35:10,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:35:10,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:35:10,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:35:10,960 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:35:10,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:35:10,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:35:10,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:35:10,963 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:35:10,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:35:10,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:35:10,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:35:10,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:35:10,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:35:10,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:35:10,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:35:10,976 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:35:11,016 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:35:11,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:35:11,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:35:11,022 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:35:11,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:35:11,023 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:35:11,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:35:11,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:35:11,025 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:35:11,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:35:11,026 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:35:11,026 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:35:11,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:35:11,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:35:11,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:35:11,027 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:35:11,028 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:35:11,028 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:35:11,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:35:11,028 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:35:11,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:35:11,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:35:11,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:35:11,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:35:11,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:35:11,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:35:11,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:35:11,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:35:11,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:35:11,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:35:11,031 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57855fd15a600148bf8b2d693e60ae0827a95c157ed69e07e1c42c75fda7c9c4 [2022-11-16 11:35:11,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:35:11,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:35:11,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:35:11,437 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:35:11,438 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:35:11,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2022-11-16 11:35:11,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/data/518da9f5f/a3604b209d7c43a1bddd01dde390dca1/FLAG16c2c8099 [2022-11-16 11:35:12,095 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:35:12,096 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/sv-benchmarks/c/array-memsafety/openbsd_cstrncpy-alloca-2.i [2022-11-16 11:35:12,120 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/data/518da9f5f/a3604b209d7c43a1bddd01dde390dca1/FLAG16c2c8099 [2022-11-16 11:35:12,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/data/518da9f5f/a3604b209d7c43a1bddd01dde390dca1 [2022-11-16 11:35:12,378 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:35:12,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:35:12,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:35:12,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:35:12,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:35:12,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1320866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12, skipping insertion in model container [2022-11-16 11:35:12,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:35:12,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:35:12,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:35:12,846 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:35:12,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:35:12,904 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:35:12,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12 WrapperNode [2022-11-16 11:35:12,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:35:12,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:35:12,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:35:12,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:35:12,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,948 INFO L138 Inliner]: procedures = 117, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-16 11:35:12,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:35:12,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:35:12,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:35:12,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:35:12,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,988 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:12,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:35:13,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:35:13,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:35:13,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:35:13,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (1/1) ... [2022-11-16 11:35:13,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:35:13,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:13,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:35:13,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:35:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:35:13,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:35:13,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:35:13,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:35:13,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:35:13,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:35:13,304 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:35:13,306 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:35:13,572 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:35:13,586 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:35:13,586 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:35:13,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:35:13 BoogieIcfgContainer [2022-11-16 11:35:13,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:35:13,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:35:13,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:35:13,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:35:13,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:35:12" (1/3) ... [2022-11-16 11:35:13,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e582721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:35:13, skipping insertion in model container [2022-11-16 11:35:13,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:35:12" (2/3) ... [2022-11-16 11:35:13,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e582721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:35:13, skipping insertion in model container [2022-11-16 11:35:13,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:35:13" (3/3) ... [2022-11-16 11:35:13,606 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncpy-alloca-2.i [2022-11-16 11:35:13,628 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:35:13,628 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-11-16 11:35:13,686 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:35:13,693 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=FINITE_AUTOMATA, 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;@61762f40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:35:13,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-16 11:35:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:13,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:35:13,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:13,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:13,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:13,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:13,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029043, now seen corresponding path program 1 times [2022-11-16 11:35:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:13,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66056274] [2022-11-16 11:35:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:14,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:14,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66056274] [2022-11-16 11:35:14,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66056274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:14,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:14,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:35:14,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299160638] [2022-11-16 11:35:14,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:14,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:35:14,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:14,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:35:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:35:14,297 INFO L87 Difference]: Start difference. First operand has 38 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 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, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-11-16 11:35:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:14,480 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-11-16 11:35:14,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:35:14,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 [2022-11-16 11:35:14,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:14,490 INFO L225 Difference]: With dead ends: 68 [2022-11-16 11:35:14,491 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 11:35:14,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:35:14,495 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 96 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:14,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 60 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 11:35:14,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 34. [2022-11-16 11:35:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-16 11:35:14,539 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 7 [2022-11-16 11:35:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:14,540 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-16 11:35:14,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-11-16 11:35:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-16 11:35:14,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:35:14,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:14,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:14,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:35:14,542 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:14,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:14,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029044, now seen corresponding path program 1 times [2022-11-16 11:35:14,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:14,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393724295] [2022-11-16 11:35:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393724295] [2022-11-16 11:35:14,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393724295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:14,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:14,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:35:14,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228445996] [2022-11-16 11:35:14,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:14,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:35:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:35:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:35:14,704 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-11-16 11:35:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:14,754 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2022-11-16 11:35:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:35:14,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 [2022-11-16 11:35:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:14,755 INFO L225 Difference]: With dead ends: 64 [2022-11-16 11:35:14,756 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 11:35:14,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:35:14,757 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 65 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:14,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 61 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 11:35:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2022-11-16 11:35:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.5625) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-11-16 11:35:14,765 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 7 [2022-11-16 11:35:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:14,765 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-11-16 11:35:14,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2022-11-16 11:35:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-11-16 11:35:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:35:14,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:14,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:14,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:35:14,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2022-11-16 11:35:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:14,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600455557] [2022-11-16 11:35:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:14,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:14,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:14,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600455557] [2022-11-16 11:35:14,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600455557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:14,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:14,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:35:14,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112614389] [2022-11-16 11:35:14,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:14,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:35:14,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:35:14,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:35:14,842 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-16 11:35:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:14,864 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-11-16 11:35:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:35:14,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-11-16 11:35:14,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:14,870 INFO L225 Difference]: With dead ends: 60 [2022-11-16 11:35:14,870 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 11:35:14,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:35:14,871 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:14,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 71 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 11:35:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2022-11-16 11:35:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 37 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) [2022-11-16 11:35:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-11-16 11:35:14,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 7 [2022-11-16 11:35:14,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:14,877 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-11-16 11:35:14,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-16 11:35:14,877 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-11-16 11:35:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:35:14,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:14,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:14,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:35:14,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:14,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:14,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876086, now seen corresponding path program 1 times [2022-11-16 11:35:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643630705] [2022-11-16 11:35:14,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:14,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:15,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:15,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643630705] [2022-11-16 11:35:15,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643630705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:15,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:15,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:35:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569249977] [2022-11-16 11:35:15,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:15,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:35:15,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:35:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:35:15,124 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:15,160 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-11-16 11:35:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:35:15,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:35:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:15,161 INFO L225 Difference]: With dead ends: 37 [2022-11-16 11:35:15,161 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 11:35:15,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:35:15,163 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:15,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:15,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 11:35:15,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-11-16 11:35:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-11-16 11:35:15,168 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 7 [2022-11-16 11:35:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:15,168 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-11-16 11:35:15,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-11-16 11:35:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:35:15,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:15,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:15,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:35:15,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:15,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:15,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-11-16 11:35:15,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:15,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484519501] [2022-11-16 11:35:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:15,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:15,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484519501] [2022-11-16 11:35:15,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484519501] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:15,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:15,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:35:15,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698260137] [2022-11-16 11:35:15,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:15,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:35:15,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:15,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:35:15,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:35:15,430 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:15,574 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-11-16 11:35:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:35:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:35:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:15,581 INFO L225 Difference]: With dead ends: 63 [2022-11-16 11:35:15,581 INFO L226 Difference]: Without dead ends: 63 [2022-11-16 11:35:15,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:35:15,590 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:15,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 68 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:15,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-16 11:35:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 38. [2022-11-16 11:35:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-11-16 11:35:15,603 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 7 [2022-11-16 11:35:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:15,603 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-11-16 11:35:15,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-11-16 11:35:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:35:15,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:15,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:15,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:35:15,610 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:15,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1954751785, now seen corresponding path program 1 times [2022-11-16 11:35:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:15,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277430285] [2022-11-16 11:35:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:15,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:15,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:15,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277430285] [2022-11-16 11:35:15,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277430285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:15,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:15,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:35:15,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753171627] [2022-11-16 11:35:15,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:35:15,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:15,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:35:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:35:15,718 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2022-11-16 11:35:15,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:15,824 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-11-16 11:35:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:35:15,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 [2022-11-16 11:35:15,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:15,829 INFO L225 Difference]: With dead ends: 39 [2022-11-16 11:35:15,830 INFO L226 Difference]: Without dead ends: 39 [2022-11-16 11:35:15,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:35:15,835 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:15,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 67 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-16 11:35:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-11-16 11:35:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.5) internal successors, (45), 36 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) [2022-11-16 11:35:15,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-16 11:35:15,853 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 11 [2022-11-16 11:35:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:15,853 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-16 11:35:15,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2022-11-16 11:35:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-16 11:35:15,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:35:15,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:15,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:15,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:35:15,858 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1954751784, now seen corresponding path program 1 times [2022-11-16 11:35:15,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:15,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355802577] [2022-11-16 11:35:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:15,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:16,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:16,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355802577] [2022-11-16 11:35:16,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355802577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:16,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:16,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:35:16,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848333683] [2022-11-16 11:35:16,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:16,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:35:16,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:16,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:35:16,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:35:16,148 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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) [2022-11-16 11:35:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:16,307 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-11-16 11:35:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:35:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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 [2022-11-16 11:35:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:16,310 INFO L225 Difference]: With dead ends: 44 [2022-11-16 11:35:16,310 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 11:35:16,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:35:16,312 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:16,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 84 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 11:35:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-11-16 11:35:16,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.46875) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-16 11:35:16,331 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-11-16 11:35:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:16,331 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-16 11:35:16,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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) [2022-11-16 11:35:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-16 11:35:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:35:16,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:16,333 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:16,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:35:16,334 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:16,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:16,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-11-16 11:35:16,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:16,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213072424] [2022-11-16 11:35:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:16,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:16,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213072424] [2022-11-16 11:35:16,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213072424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:35:16,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958405228] [2022-11-16 11:35:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:16,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:16,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:16,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:16,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:35:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:16,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:35:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:16,865 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 11:35:16,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-16 11:35:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:17,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:17,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958405228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:17,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:35:17,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-11-16 11:35:17,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727893463] [2022-11-16 11:35:17,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:17,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:35:17,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:17,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:35:17,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:35:17,384 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:17,698 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-11-16 11:35:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:35:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:35:17,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:17,700 INFO L225 Difference]: With dead ends: 89 [2022-11-16 11:35:17,700 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 11:35:17,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:35:17,701 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 310 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:17,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 199 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:17,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 11:35:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 36. [2022-11-16 11:35:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-11-16 11:35:17,705 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 11 [2022-11-16 11:35:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:17,705 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-11-16 11:35:17,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-11-16 11:35:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:35:17,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:17,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:17,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:17,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:35:17,907 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash -466410634, now seen corresponding path program 1 times [2022-11-16 11:35:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:17,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945028372] [2022-11-16 11:35:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:17,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:17,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945028372] [2022-11-16 11:35:17,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945028372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:17,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:17,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:35:17,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224933322] [2022-11-16 11:35:17,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:17,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:35:17,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:17,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:35:17,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:35:17,979 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:18,008 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-11-16 11:35:18,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:35:18,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:35:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:18,009 INFO L225 Difference]: With dead ends: 73 [2022-11-16 11:35:18,009 INFO L226 Difference]: Without dead ends: 73 [2022-11-16 11:35:18,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:35:18,010 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 44 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:18,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 108 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:18,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-16 11:35:18,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2022-11-16 11:35:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.35) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-16 11:35:18,014 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 12 [2022-11-16 11:35:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:18,015 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-16 11:35:18,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-16 11:35:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:35:18,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:18,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:18,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:35:18,017 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:18,017 INFO L85 PathProgramCache]: Analyzing trace with hash -467763174, now seen corresponding path program 1 times [2022-11-16 11:35:18,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:18,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797137493] [2022-11-16 11:35:18,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:18,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:18,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:18,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797137493] [2022-11-16 11:35:18,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797137493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:18,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:18,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:35:18,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388048548] [2022-11-16 11:35:18,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:35:18,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:35:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:35:18,178 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:18,257 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-11-16 11:35:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:35:18,257 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:35:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:18,258 INFO L225 Difference]: With dead ends: 47 [2022-11-16 11:35:18,258 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 11:35:18,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:35:18,259 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:18,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 64 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:18,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 11:35:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-16 11:35:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2022-11-16 11:35:18,272 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 12 [2022-11-16 11:35:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:18,272 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2022-11-16 11:35:18,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2022-11-16 11:35:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:35:18,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:18,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:18,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:35:18,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash -467763173, now seen corresponding path program 1 times [2022-11-16 11:35:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:18,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226107278] [2022-11-16 11:35:18,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:18,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:18,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:18,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226107278] [2022-11-16 11:35:18,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226107278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:18,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:18,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:35:18,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669256780] [2022-11-16 11:35:18,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:18,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:35:18,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:35:18,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:35:18,529 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:18,680 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-11-16 11:35:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:35:18,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:35:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:18,682 INFO L225 Difference]: With dead ends: 67 [2022-11-16 11:35:18,682 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 11:35:18,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:35:18,683 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 92 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:18,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 154 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 11:35:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2022-11-16 11:35:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-16 11:35:18,686 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 12 [2022-11-16 11:35:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:18,686 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-16 11:35:18,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-16 11:35:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:35:18,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:18,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:18,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:35:18,687 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:18,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash 213647736, now seen corresponding path program 1 times [2022-11-16 11:35:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:18,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83185310] [2022-11-16 11:35:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:18,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:18,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83185310] [2022-11-16 11:35:18,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83185310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:18,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:18,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:35:18,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961674534] [2022-11-16 11:35:18,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:18,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:35:18,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:35:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:35:18,771 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:18,801 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-11-16 11:35:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:35:18,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:35:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:18,802 INFO L225 Difference]: With dead ends: 53 [2022-11-16 11:35:18,802 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 11:35:18,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:35:18,803 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:18,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 60 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 11:35:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-11-16 11:35:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-16 11:35:18,806 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 12 [2022-11-16 11:35:18,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:18,806 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-16 11:35:18,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:18,806 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-16 11:35:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:35:18,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:18,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:18,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:35:18,807 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:18,807 INFO L85 PathProgramCache]: Analyzing trace with hash 212295197, now seen corresponding path program 1 times [2022-11-16 11:35:18,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:18,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053281118] [2022-11-16 11:35:18,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:18,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:19,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:19,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053281118] [2022-11-16 11:35:19,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053281118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:19,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:19,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:35:19,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522838987] [2022-11-16 11:35:19,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:19,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:35:19,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:19,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:35:19,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:35:19,036 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:19,155 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-16 11:35:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:35:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:35:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:19,156 INFO L225 Difference]: With dead ends: 50 [2022-11-16 11:35:19,156 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 11:35:19,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:35:19,157 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:19,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 72 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:19,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 11:35:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2022-11-16 11:35:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-16 11:35:19,159 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 12 [2022-11-16 11:35:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:19,159 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-16 11:35:19,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-16 11:35:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:35:19,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:19,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:35:19,161 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1302901600, now seen corresponding path program 1 times [2022-11-16 11:35:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:19,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242545407] [2022-11-16 11:35:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:19,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:19,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242545407] [2022-11-16 11:35:19,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242545407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:19,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:19,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:35:19,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989596730] [2022-11-16 11:35:19,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:19,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:35:19,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:19,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:35:19,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:35:19,226 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:19,280 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-16 11:35:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:35:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 [2022-11-16 11:35:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:19,283 INFO L225 Difference]: With dead ends: 35 [2022-11-16 11:35:19,283 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 11:35:19,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:35:19,284 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:19,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 76 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 11:35:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-16 11:35:19,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-16 11:35:19,288 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 16 [2022-11-16 11:35:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:19,289 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-16 11:35:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-16 11:35:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:35:19,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:19,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:19,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:35:19,292 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:19,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1302901599, now seen corresponding path program 1 times [2022-11-16 11:35:19,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:19,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138070293] [2022-11-16 11:35:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:19,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:19,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:19,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138070293] [2022-11-16 11:35:19,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138070293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:19,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:19,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:35:19,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430305004] [2022-11-16 11:35:19,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:19,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:35:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:35:19,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:35:19,412 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:19,464 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-11-16 11:35:19,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:35:19,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 [2022-11-16 11:35:19,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:19,466 INFO L225 Difference]: With dead ends: 69 [2022-11-16 11:35:19,466 INFO L226 Difference]: Without dead ends: 69 [2022-11-16 11:35:19,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:35:19,469 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:19,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 128 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-16 11:35:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-11-16 11:35:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:19,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-11-16 11:35:19,474 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 16 [2022-11-16 11:35:19,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:19,474 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-11-16 11:35:19,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-11-16 11:35:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:35:19,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:19,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:19,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:35:19,477 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:19,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1889707613, now seen corresponding path program 1 times [2022-11-16 11:35:19,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:19,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622925188] [2022-11-16 11:35:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:19,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:19,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:19,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622925188] [2022-11-16 11:35:19,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622925188] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:19,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:19,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:35:19,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58809154] [2022-11-16 11:35:19,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:19,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:35:19,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:19,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:35:19,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:35:19,964 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:20,354 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-11-16 11:35:20,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:35:20,354 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 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 [2022-11-16 11:35:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:20,356 INFO L225 Difference]: With dead ends: 57 [2022-11-16 11:35:20,356 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 11:35:20,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:35:20,357 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:20,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 127 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:20,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 11:35:20,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-11-16 11:35:20,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-11-16 11:35:20,360 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 16 [2022-11-16 11:35:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:20,360 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-11-16 11:35:20,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-11-16 11:35:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:35:20,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:20,361 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:35:20,361 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:20,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:20,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1717205610, now seen corresponding path program 1 times [2022-11-16 11:35:20,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:20,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486996750] [2022-11-16 11:35:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:20,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:20,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:20,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486996750] [2022-11-16 11:35:20,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486996750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:20,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:20,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:35:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441314997] [2022-11-16 11:35:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:20,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:35:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:35:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:35:20,488 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:20,531 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-11-16 11:35:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:35:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:35:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:20,532 INFO L225 Difference]: With dead ends: 61 [2022-11-16 11:35:20,533 INFO L226 Difference]: Without dead ends: 61 [2022-11-16 11:35:20,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:35:20,533 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:20,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 112 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-16 11:35:20,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2022-11-16 11:35:20,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-16 11:35:20,536 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 17 [2022-11-16 11:35:20,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:20,537 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-16 11:35:20,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-16 11:35:20,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:35:20,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:20,538 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:20,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:35:20,538 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:20,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:20,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1566644436, now seen corresponding path program 1 times [2022-11-16 11:35:20,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:20,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209336672] [2022-11-16 11:35:20,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:20,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:20,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:20,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209336672] [2022-11-16 11:35:20,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209336672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:20,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:20,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:35:20,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402644840] [2022-11-16 11:35:20,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:20,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:35:20,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:35:20,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:35:20,788 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2022-11-16 11:35:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:20,973 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2022-11-16 11:35:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:35:20,973 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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 [2022-11-16 11:35:20,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:20,976 INFO L225 Difference]: With dead ends: 85 [2022-11-16 11:35:20,976 INFO L226 Difference]: Without dead ends: 85 [2022-11-16 11:35:20,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:35:20,977 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 61 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:20,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 170 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-16 11:35:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 71. [2022-11-16 11:35:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.208955223880597) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-11-16 11:35:20,983 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 17 [2022-11-16 11:35:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:20,984 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-11-16 11:35:20,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2022-11-16 11:35:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-11-16 11:35:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:35:20,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:20,986 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:20,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:35:20,987 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash 286780758, now seen corresponding path program 1 times [2022-11-16 11:35:20,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:20,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967382092] [2022-11-16 11:35:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:20,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:21,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:21,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967382092] [2022-11-16 11:35:21,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967382092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:21,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:21,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:35:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785240119] [2022-11-16 11:35:21,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:21,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:35:21,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:21,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:35:21,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:35:21,255 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2022-11-16 11:35:21,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:21,448 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-11-16 11:35:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:35:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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 [2022-11-16 11:35:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:21,450 INFO L225 Difference]: With dead ends: 107 [2022-11-16 11:35:21,450 INFO L226 Difference]: Without dead ends: 107 [2022-11-16 11:35:21,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:35:21,451 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 112 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:21,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 152 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-16 11:35:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2022-11-16 11:35:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-11-16 11:35:21,454 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 17 [2022-11-16 11:35:21,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:21,455 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-11-16 11:35:21,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 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) [2022-11-16 11:35:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-11-16 11:35:21,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:35:21,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:21,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:21,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 11:35:21,456 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:21,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2041976217, now seen corresponding path program 1 times [2022-11-16 11:35:21,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:21,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275046157] [2022-11-16 11:35:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:21,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:21,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:21,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275046157] [2022-11-16 11:35:21,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275046157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:35:21,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:35:21,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:35:21,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626323626] [2022-11-16 11:35:21,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:35:21,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:35:21,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:35:21,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:35:21,597 INFO L87 Difference]: Start difference. First operand 73 states and 85 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) [2022-11-16 11:35:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:21,616 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-11-16 11:35:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:35:21,617 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 [2022-11-16 11:35:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:21,617 INFO L225 Difference]: With dead ends: 72 [2022-11-16 11:35:21,618 INFO L226 Difference]: Without dead ends: 43 [2022-11-16 11:35:21,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:35:21,619 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:21,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:35:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-16 11:35:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-16 11:35:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.2) 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) [2022-11-16 11:35:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-16 11:35:21,626 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 18 [2022-11-16 11:35:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:21,627 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-16 11:35:21,628 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) [2022-11-16 11:35:21,628 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-16 11:35:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:35:21,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:21,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:21,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:35:21,631 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2012971173, now seen corresponding path program 1 times [2022-11-16 11:35:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039085954] [2022-11-16 11:35:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:21,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:22,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:22,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039085954] [2022-11-16 11:35:22,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039085954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:35:22,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377692645] [2022-11-16 11:35:22,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:22,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:22,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:22,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:22,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:35:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:22,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 11:35:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:22,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-16 11:35:22,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:35:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:23,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:24,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:35:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:24,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377692645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:24,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:35:24,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 33 [2022-11-16 11:35:24,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786218614] [2022-11-16 11:35:24,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:24,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:35:24,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:24,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:35:24,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:35:24,104 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 34 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:26,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:26,591 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2022-11-16 11:35:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:35:26,595 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 11:35:26,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:26,595 INFO L225 Difference]: With dead ends: 69 [2022-11-16 11:35:26,596 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 11:35:26,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:35:26,598 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 116 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:26,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 231 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:35:26,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 11:35:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-11-16 11:35:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.225) internal successors, (49), 42 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) [2022-11-16 11:35:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-16 11:35:26,601 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2022-11-16 11:35:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:26,602 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-16 11:35:26,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-16 11:35:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:35:26,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:26,603 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:26,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 11:35:26,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:35:26,808 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)] === [2022-11-16 11:35:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash -718716967, now seen corresponding path program 1 times [2022-11-16 11:35:26,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:26,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913122218] [2022-11-16 11:35:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:26,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:27,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913122218] [2022-11-16 11:35:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913122218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:35:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172143780] [2022-11-16 11:35:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:27,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:27,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:27,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:27,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:35:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:27,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:35:27,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:27,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:27,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:35:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:27,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172143780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:27,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:35:27,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-11-16 11:35:27,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274424048] [2022-11-16 11:35:27,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:27,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:35:27,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:35:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:35:27,725 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:28,083 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-11-16 11:35:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:35:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 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 21 [2022-11-16 11:35:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:28,087 INFO L225 Difference]: With dead ends: 47 [2022-11-16 11:35:28,087 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 11:35:28,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:35:28,088 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 255 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:28,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 108 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:35:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 11:35:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-11-16 11:35:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.2) 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) [2022-11-16 11:35:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-16 11:35:28,090 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 21 [2022-11-16 11:35:28,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:28,091 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-16 11:35:28,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-16 11:35:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:35:28,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:28,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:28,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:28,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:28,298 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)] === [2022-11-16 11:35:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash -805389510, now seen corresponding path program 1 times [2022-11-16 11:35:28,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:28,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118722095] [2022-11-16 11:35:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:28,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:28,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:28,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118722095] [2022-11-16 11:35:28,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118722095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:35:28,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422179177] [2022-11-16 11:35:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:28,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:28,866 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:28,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:35:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 11:35:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:28,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:28,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 11:35:28,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:35:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:29,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:29,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422179177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:29,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:35:29,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2022-11-16 11:35:29,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027715264] [2022-11-16 11:35:29,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:29,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:35:29,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:35:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:35:29,978 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:31,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:31,060 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-11-16 11:35:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:35:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 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 22 [2022-11-16 11:35:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:31,061 INFO L225 Difference]: With dead ends: 44 [2022-11-16 11:35:31,061 INFO L226 Difference]: Without dead ends: 44 [2022-11-16 11:35:31,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:35:31,062 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:31,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 165 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:35:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-16 11:35:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-11-16 11:35:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-11-16 11:35:31,064 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 22 [2022-11-16 11:35:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:31,064 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-11-16 11:35:31,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-11-16 11:35:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:35:31,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:31,065 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, 1, 1, 1] [2022-11-16 11:35:31,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:31,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:31,266 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:31,266 INFO L85 PathProgramCache]: Analyzing trace with hash -279519168, now seen corresponding path program 1 times [2022-11-16 11:35:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:31,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511255738] [2022-11-16 11:35:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:32,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:32,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511255738] [2022-11-16 11:35:32,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511255738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:35:32,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146099618] [2022-11-16 11:35:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:32,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:32,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:32,022 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:32,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:35:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:32,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 11:35:32,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:32,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:32,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-16 11:35:32,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:35:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:33,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:34,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:35:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:34,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146099618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:34,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:35:34,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 34 [2022-11-16 11:35:34,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294094396] [2022-11-16 11:35:34,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:34,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:35:34,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:34,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:35:34,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:35:34,212 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:36,695 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-11-16 11:35:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:35:36,696 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-16 11:35:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:36,696 INFO L225 Difference]: With dead ends: 68 [2022-11-16 11:35:36,697 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 11:35:36,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=484, Invalid=3056, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 11:35:36,699 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 232 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:36,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 179 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:35:36,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 11:35:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2022-11-16 11:35:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-11-16 11:35:36,701 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 26 [2022-11-16 11:35:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:36,701 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-11-16 11:35:36,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:36,701 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-11-16 11:35:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 11:35:36,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:36,702 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:36,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:36,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:36,903 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:36,903 INFO L85 PathProgramCache]: Analyzing trace with hash -57121321, now seen corresponding path program 2 times [2022-11-16 11:35:36,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:36,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787056887] [2022-11-16 11:35:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:36,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:37,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:37,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787056887] [2022-11-16 11:35:37,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787056887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:35:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140405412] [2022-11-16 11:35:37,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:35:37,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:37,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:37,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:37,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:35:37,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:35:37,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:35:37,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 11:35:37,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:37,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:35:37,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:35:38,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:35:38,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:35:38,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-16 11:35:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:38,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:39,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:35:39,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:35:39,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:35:39,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-16 11:35:39,643 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 11 treesize of output 7 [2022-11-16 11:35:39,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 11:35:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:39,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140405412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:39,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:35:39,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2022-11-16 11:35:39,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586859028] [2022-11-16 11:35:39,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:35:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:39,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:35:39,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:35:39,836 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:40,979 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2022-11-16 11:35:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:35:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-16 11:35:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:40,981 INFO L225 Difference]: With dead ends: 80 [2022-11-16 11:35:40,981 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 11:35:40,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=230, Invalid=2422, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:35:40,985 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:40,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 334 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-11-16 11:35:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 11:35:40,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-11-16 11:35:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 75 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2022-11-16 11:35:40,997 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 27 [2022-11-16 11:35:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:40,998 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2022-11-16 11:35:40,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:40,998 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2022-11-16 11:35:40,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:35:40,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:41,000 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:41,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:41,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 11:35:41,201 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:41,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:41,201 INFO L85 PathProgramCache]: Analyzing trace with hash 614687385, now seen corresponding path program 2 times [2022-11-16 11:35:41,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:41,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572879417] [2022-11-16 11:35:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:41,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:35:41,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572879417] [2022-11-16 11:35:41,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572879417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:35:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934550134] [2022-11-16 11:35:41,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:35:41,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:41,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:41,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:41,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:35:42,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:35:42,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:35:42,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 11:35:42,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:42,204 INFO L321 Elim1Store]: treesize reduction 11, result has 50.0 percent of original size [2022-11-16 11:35:42,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-16 11:35:42,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:35:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:35:43,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:44,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:35:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:35:44,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934550134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:44,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:35:44,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 37 [2022-11-16 11:35:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507790869] [2022-11-16 11:35:44,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:44,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:35:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:35:44,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:35:44,166 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:46,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:46,523 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-11-16 11:35:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:35:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-16 11:35:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:46,524 INFO L225 Difference]: With dead ends: 86 [2022-11-16 11:35:46,524 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 11:35:46,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=461, Invalid=2961, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 11:35:46,526 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 145 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:46,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 236 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:35:46,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 11:35:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-11-16 11:35:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 78 states have (on average 1.141025641025641) internal successors, (89), 80 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-11-16 11:35:46,531 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 32 [2022-11-16 11:35:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:46,531 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-11-16 11:35:46,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 38 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-11-16 11:35:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:35:46,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:46,532 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:46,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:46,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:35:46,743 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:46,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1981775400, now seen corresponding path program 3 times [2022-11-16 11:35:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:46,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562821745] [2022-11-16 11:35:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:46,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:46,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:47,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:47,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562821745] [2022-11-16 11:35:47,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562821745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:35:47,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066051172] [2022-11-16 11:35:47,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:35:47,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:47,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:47,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:47,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:35:47,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:35:47,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:35:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-16 11:35:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:47,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:35:48,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:35:48,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:35:48,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:35:48,283 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 [2022-11-16 11:35:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:35:48,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:48,436 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_366 (Array Int Int)) (v_ArrVal_367 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_366) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_367) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:35:48,452 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_367 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_367) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:35:48,458 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_367 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_367) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-11-16 11:35:48,464 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_367 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_367) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-16 11:35:48,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:35:48,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:35:48,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:35:48,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:35:48,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:35:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-16 11:35:48,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066051172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:48,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:35:48,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 36 [2022-11-16 11:35:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553722945] [2022-11-16 11:35:48,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:35:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:35:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=875, Unknown=21, NotChecked=252, Total=1260 [2022-11-16 11:35:48,711 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:35:49,407 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2022-11-16 11:35:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:35:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-16 11:35:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:35:49,408 INFO L225 Difference]: With dead ends: 139 [2022-11-16 11:35:49,408 INFO L226 Difference]: Without dead ends: 139 [2022-11-16 11:35:49,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=160, Invalid=1317, Unknown=21, NotChecked=308, Total=1806 [2022-11-16 11:35:49,410 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 55 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:35:49,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 557 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 514 Invalid, 0 Unknown, 278 Unchecked, 0.3s Time] [2022-11-16 11:35:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-16 11:35:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2022-11-16 11:35:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 103 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-11-16 11:35:49,433 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 37 [2022-11-16 11:35:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:35:49,433 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-11-16 11:35:49,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:35:49,434 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-11-16 11:35:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 11:35:49,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:35:49,434 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:35:49,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:35:49,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:35:49,635 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:35:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:35:49,636 INFO L85 PathProgramCache]: Analyzing trace with hash -842040856, now seen corresponding path program 1 times [2022-11-16 11:35:49,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:35:49,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379663000] [2022-11-16 11:35:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:49,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:35:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:51,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:35:51,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379663000] [2022-11-16 11:35:51,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379663000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:35:51,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584234893] [2022-11-16 11:35:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:35:51,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:35:51,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:35:51,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:35:51,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:35:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:35:51,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-16 11:35:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:35:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:35:51,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-16 11:35:51,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:35:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:52,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:35:54,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:35:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:35:54,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584234893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:35:54,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:35:54,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 17] total 53 [2022-11-16 11:35:54,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378683020] [2022-11-16 11:35:54,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:35:54,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-16 11:35:54,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:35:54,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-16 11:35:54,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2630, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:35:54,357 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 54 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) [2022-11-16 11:36:17,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:17,108 INFO L93 Difference]: Finished difference Result 225 states and 238 transitions. [2022-11-16 11:36:17,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-16 11:36:17,109 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-16 11:36:17,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:17,110 INFO L225 Difference]: With dead ends: 225 [2022-11-16 11:36:17,110 INFO L226 Difference]: Without dead ends: 131 [2022-11-16 11:36:17,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6273 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=2492, Invalid=19264, Unknown=0, NotChecked=0, Total=21756 [2022-11-16 11:36:17,116 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 693 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:17,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 402 Invalid, 1209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 11:36:17,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-16 11:36:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2022-11-16 11:36:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.2149532710280373) internal successors, (130), 109 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) [2022-11-16 11:36:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2022-11-16 11:36:17,120 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 38 [2022-11-16 11:36:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:17,120 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2022-11-16 11:36:17,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 54 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) [2022-11-16 11:36:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2022-11-16 11:36:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:36:17,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:17,122 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:17,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:17,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 11:36:17,327 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:36:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash 207254747, now seen corresponding path program 4 times [2022-11-16 11:36:17,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:17,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049969373] [2022-11-16 11:36:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:17,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:17,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:17,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049969373] [2022-11-16 11:36:17,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049969373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:17,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022571643] [2022-11-16 11:36:17,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:36:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:17,970 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:17,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:36:18,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:36:18,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:18,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 11:36:18,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:18,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:18,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:36:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:18,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022571643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:18,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:18,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-11-16 11:36:18,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008317216] [2022-11-16 11:36:18,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:18,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:36:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:36:18,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:36:18,890 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:19,722 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2022-11-16 11:36:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:36:19,723 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2022-11-16 11:36:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:19,724 INFO L225 Difference]: With dead ends: 110 [2022-11-16 11:36:19,724 INFO L226 Difference]: Without dead ends: 110 [2022-11-16 11:36:19,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=339, Invalid=1383, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:36:19,725 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 372 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:19,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 247 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:36:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-16 11:36:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-16 11:36:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.205607476635514) internal successors, (129), 109 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 129 transitions. [2022-11-16 11:36:19,729 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 129 transitions. Word has length 41 [2022-11-16 11:36:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:19,730 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 129 transitions. [2022-11-16 11:36:19,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 129 transitions. [2022-11-16 11:36:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:36:19,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:19,731 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:19,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:19,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:36:19,935 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:36:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1595560281, now seen corresponding path program 5 times [2022-11-16 11:36:19,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:19,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267286496] [2022-11-16 11:36:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:19,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:21,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:21,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267286496] [2022-11-16 11:36:21,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267286496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:21,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708028132] [2022-11-16 11:36:21,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:36:21,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:21,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:21,019 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:21,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:36:21,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 11:36:21,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-16 11:36:21,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:21,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:36:21,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:36:21,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:36:22,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:36:22,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:36:22,113 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 [2022-11-16 11:36:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:22,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:22,315 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_494 (Array Int Int)) (v_ArrVal_495 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_494) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_495) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:36:22,408 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_493 (Array Int Int)) (v_ArrVal_495 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_493) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_495) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:36:22,418 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_495 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_495) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:36:22,424 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_495 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_495) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-11-16 11:36:22,431 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_495 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_495) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-16 11:36:22,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:22,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:36:22,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:22,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:36:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-11-16 11:36:22,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708028132] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:22,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:22,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 43 [2022-11-16 11:36:22,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891291357] [2022-11-16 11:36:22,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:22,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 11:36:22,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:22,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 11:36:22,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1248, Unknown=49, NotChecked=380, Total=1806 [2022-11-16 11:36:22,717 INFO L87 Difference]: Start difference. First operand 110 states and 129 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:23,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:23,539 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2022-11-16 11:36:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:36:23,539 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-16 11:36:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:23,540 INFO L225 Difference]: With dead ends: 142 [2022-11-16 11:36:23,541 INFO L226 Difference]: Without dead ends: 117 [2022-11-16 11:36:23,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=196, Invalid=1937, Unknown=49, NotChecked=470, Total=2652 [2022-11-16 11:36:23,542 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:23,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 594 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 279 Invalid, 0 Unknown, 265 Unchecked, 0.2s Time] [2022-11-16 11:36:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-16 11:36:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-11-16 11:36:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 113 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) [2022-11-16 11:36:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 133 transitions. [2022-11-16 11:36:23,546 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 133 transitions. Word has length 47 [2022-11-16 11:36:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:23,547 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 133 transitions. [2022-11-16 11:36:23,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 133 transitions. [2022-11-16 11:36:23,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 11:36:23,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:23,548 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:23,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:23,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:23,755 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:36:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1297179492, now seen corresponding path program 6 times [2022-11-16 11:36:23,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:23,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904051928] [2022-11-16 11:36:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:23,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:24,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:24,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904051928] [2022-11-16 11:36:24,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904051928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:24,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011615478] [2022-11-16 11:36:24,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:36:24,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:24,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:24,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:24,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:36:24,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 11:36:24,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:24,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 11:36:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:25,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:25,719 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 18 [2022-11-16 11:36:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:25,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011615478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:25,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:25,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-11-16 11:36:25,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945189334] [2022-11-16 11:36:25,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:25,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 11:36:25,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:25,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 11:36:25,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 11:36:25,977 INFO L87 Difference]: Start difference. First operand 114 states and 133 transitions. Second operand has 37 states, 36 states have (on average 3.361111111111111) internal successors, (121), 37 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) [2022-11-16 11:36:26,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:26,837 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2022-11-16 11:36:26,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:36:26,838 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.361111111111111) internal successors, (121), 37 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 51 [2022-11-16 11:36:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:26,839 INFO L225 Difference]: With dead ends: 114 [2022-11-16 11:36:26,839 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 11:36:26,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=539, Invalid=2011, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:36:26,840 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 343 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:26,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 246 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:36:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 11:36:26,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-11-16 11:36:26,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 111 states have (on average 1.1891891891891893) internal successors, (132), 113 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2022-11-16 11:36:26,844 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 51 [2022-11-16 11:36:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:26,845 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2022-11-16 11:36:26,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.361111111111111) internal successors, (121), 37 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) [2022-11-16 11:36:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2022-11-16 11:36:26,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:36:26,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:26,846 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:26,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:27,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:27,053 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:36:27,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash 126616925, now seen corresponding path program 2 times [2022-11-16 11:36:27,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:27,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069804730] [2022-11-16 11:36:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:27,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:36:28,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:28,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069804730] [2022-11-16 11:36:28,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069804730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:28,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125987937] [2022-11-16 11:36:28,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:28,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:28,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:28,232 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:28,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:36:28,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:28,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:28,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 11:36:28,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:28,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:28,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-16 11:36:28,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:36:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:36:29,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:36:31,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125987937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:31,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:31,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 47 [2022-11-16 11:36:31,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377273135] [2022-11-16 11:36:31,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:31,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 11:36:31,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 11:36:31,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 11:36:31,190 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 48 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:34,251 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2022-11-16 11:36:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:36:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-16 11:36:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:34,253 INFO L225 Difference]: With dead ends: 116 [2022-11-16 11:36:34,253 INFO L226 Difference]: Without dead ends: 85 [2022-11-16 11:36:34,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=692, Invalid=5008, Unknown=0, NotChecked=0, Total=5700 [2022-11-16 11:36:34,255 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:34,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 334 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:36:34,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-16 11:36:34,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2022-11-16 11:36:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:34,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-11-16 11:36:34,258 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2022-11-16 11:36:34,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:34,259 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-11-16 11:36:34,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.4893617021276597) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:34,259 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-11-16 11:36:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-16 11:36:34,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:34,260 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:34,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 11:36:34,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 11:36:34,466 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:36:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:34,467 INFO L85 PathProgramCache]: Analyzing trace with hash -351804326, now seen corresponding path program 7 times [2022-11-16 11:36:34,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:34,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863963570] [2022-11-16 11:36:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:34,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:35,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863963570] [2022-11-16 11:36:35,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863963570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:35,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357701148] [2022-11-16 11:36:35,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:36:35,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:35,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:35,939 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:35,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:36:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:36,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-16 11:36:36,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:36,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:36:36,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:36:36,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:36:36,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:36:36,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:36:36,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:36:37,006 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 [2022-11-16 11:36:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:37,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:47,266 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_650 (Array Int Int)) (v_ArrVal_653 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_650) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_653) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:36:47,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:47,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:36:47,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:36:47,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:36:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 11:36:48,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357701148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:48,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:48,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 51 [2022-11-16 11:36:48,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977547886] [2022-11-16 11:36:48,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:48,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 11:36:48,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 11:36:48,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2158, Unknown=129, NotChecked=96, Total=2550 [2022-11-16 11:36:48,043 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:49,883 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2022-11-16 11:36:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:36:49,883 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-16 11:36:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:49,884 INFO L225 Difference]: With dead ends: 98 [2022-11-16 11:36:49,884 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 11:36:49,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=397, Invalid=4168, Unknown=131, NotChecked=134, Total=4830 [2022-11-16 11:36:49,886 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 165 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:49,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 609 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 575 Invalid, 0 Unknown, 428 Unchecked, 0.5s Time] [2022-11-16 11:36:49,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 11:36:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-16 11:36:49,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:49,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-11-16 11:36:49,890 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 57 [2022-11-16 11:36:49,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:49,890 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-11-16 11:36:49,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 51 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-11-16 11:36:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:36:49,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:49,891 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:49,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:36:50,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 11:36:50,098 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:36:50,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:50,099 INFO L85 PathProgramCache]: Analyzing trace with hash -841664547, now seen corresponding path program 8 times [2022-11-16 11:36:50,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:50,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001518824] [2022-11-16 11:36:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:50,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:50,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001518824] [2022-11-16 11:36:50,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001518824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055523332] [2022-11-16 11:36:50,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:36:50,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:50,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:50,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:36:51,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:36:51,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:51,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 11:36:51,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:51,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:52,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:36:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:36:52,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055523332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:52,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:52,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-11-16 11:36:52,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058117123] [2022-11-16 11:36:52,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:52,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:36:52,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:52,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:36:52,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:36:52,368 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 38 states, 37 states have (on average 3.324324324324324) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:53,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:36:53,535 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-11-16 11:36:53,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:36:53,536 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.324324324324324) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-16 11:36:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:36:53,537 INFO L225 Difference]: With dead ends: 72 [2022-11-16 11:36:53,537 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 11:36:53,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=555, Invalid=2307, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:36:53,538 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 571 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:36:53,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 341 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:36:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 11:36:53,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-11-16 11:36:53,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 67 states have (on average 1.044776119402985) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:53,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-16 11:36:53,541 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 61 [2022-11-16 11:36:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:36:53,541 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-16 11:36:53,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.324324324324324) internal successors, (123), 38 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:36:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-16 11:36:53,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 11:36:53,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:36:53,542 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:36:53,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 11:36:53,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 11:36:53,747 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)] === [2022-11-16 11:36:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:36:53,748 INFO L85 PathProgramCache]: Analyzing trace with hash -321797194, now seen corresponding path program 3 times [2022-11-16 11:36:53,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:36:53,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424062083] [2022-11-16 11:36:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:36:53,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:36:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:36:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 11:36:55,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:36:55,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424062083] [2022-11-16 11:36:55,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424062083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:36:55,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618867370] [2022-11-16 11:36:55,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:36:55,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:36:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:36:55,115 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:36:55,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:36:55,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:36:55,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:36:55,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-16 11:36:55,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:36:55,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:36:55,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-16 11:36:55,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:36:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 11:36:57,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:36:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 11:36:58,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618867370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:36:58,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:36:58,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 50 [2022-11-16 11:36:58,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683968110] [2022-11-16 11:36:58,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:36:58,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 11:36:58,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:36:58,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 11:36:58,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2277, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 11:36:58,809 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 51 states, 50 states have (on average 2.46) internal successors, (123), 51 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:02,165 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-11-16 11:37:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 11:37:02,166 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.46) internal successors, (123), 51 states have internal predecessors, (123), 0 states have call successors, (0), 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 62 [2022-11-16 11:37:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:02,167 INFO L225 Difference]: With dead ends: 70 [2022-11-16 11:37:02,167 INFO L226 Difference]: Without dead ends: 70 [2022-11-16 11:37:02,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=719, Invalid=5287, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 11:37:02,169 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 146 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:02,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 283 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:37:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-16 11:37:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-11-16 11:37:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-11-16 11:37:02,172 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 62 [2022-11-16 11:37:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:02,172 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-11-16 11:37:02,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.46) internal successors, (123), 51 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-11-16 11:37:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 11:37:02,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:02,174 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:02,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:02,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 11:37:02,389 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:37:02,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:02,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1711491803, now seen corresponding path program 9 times [2022-11-16 11:37:02,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:02,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182524128] [2022-11-16 11:37:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:02,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:04,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182524128] [2022-11-16 11:37:04,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182524128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697532635] [2022-11-16 11:37:04,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:37:04,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:04,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:04,526 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:04,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:37:05,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 11:37:05,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:05,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-16 11:37:05,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:05,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:37:05,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:37:06,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:06,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:07,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:07,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:07,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:08,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:37:08,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:37:08,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:37:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:08,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:08,419 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_829 (Array Int Int)) (v_ArrVal_830 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_829) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_830) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:37:14,903 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_830 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_830) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:37:17,199 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_826 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_826) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0))) is different from false [2022-11-16 11:37:17,354 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_826 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_826) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-11-16 11:37:17,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:37:17,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:37:17,536 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:37:17,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:37:17,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:37:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 36 not checked. [2022-11-16 11:37:18,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697532635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:18,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:18,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 71 [2022-11-16 11:37:18,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566093650] [2022-11-16 11:37:18,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-16 11:37:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:18,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-16 11:37:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4098, Unknown=101, NotChecked=532, Total=4970 [2022-11-16 11:37:18,307 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 71 states, 71 states have (on average 2.436619718309859) internal successors, (173), 71 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:20,317 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-11-16 11:37:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 11:37:20,318 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.436619718309859) internal successors, (173), 71 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-16 11:37:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:20,319 INFO L225 Difference]: With dead ends: 112 [2022-11-16 11:37:20,319 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 11:37:20,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=356, Invalid=6201, Unknown=101, NotChecked=652, Total=7310 [2022-11-16 11:37:20,320 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:20,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 925 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 722 Invalid, 0 Unknown, 518 Unchecked, 0.6s Time] [2022-11-16 11:37:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 11:37:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2022-11-16 11:37:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-11-16 11:37:20,324 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2022-11-16 11:37:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:20,324 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-11-16 11:37:20,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.436619718309859) internal successors, (173), 71 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:20,325 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-11-16 11:37:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:37:20,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:20,325 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:20,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:37:20,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:20,533 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:37:20,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:20,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1133270686, now seen corresponding path program 10 times [2022-11-16 11:37:20,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:20,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036045739] [2022-11-16 11:37:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:20,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:21,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:21,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036045739] [2022-11-16 11:37:21,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036045739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:21,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604483475] [2022-11-16 11:37:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:37:21,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:21,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:21,826 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:21,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:37:22,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:37:22,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:22,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-16 11:37:22,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:22,164 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:37:22,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:37:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:22,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:23,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604483475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:23,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:23,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 48 [2022-11-16 11:37:23,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479673214] [2022-11-16 11:37:23,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:23,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 11:37:23,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:23,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 11:37:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:37:23,996 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 49 states, 48 states have (on average 3.5208333333333335) internal successors, (169), 49 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:25,814 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-11-16 11:37:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:37:25,814 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 3.5208333333333335) internal successors, (169), 49 states have internal predecessors, (169), 0 states have call successors, (0), 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 71 [2022-11-16 11:37:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:25,815 INFO L225 Difference]: With dead ends: 80 [2022-11-16 11:37:25,815 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 11:37:25,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=883, Invalid=3539, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 11:37:25,816 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 425 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:25,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 416 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:37:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 11:37:25,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-11-16 11:37:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-11-16 11:37:25,819 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 71 [2022-11-16 11:37:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:25,820 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-11-16 11:37:25,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 3.5208333333333335) internal successors, (169), 49 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-11-16 11:37:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 11:37:25,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:25,821 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:25,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-16 11:37:26,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:26,022 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:37:26,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:26,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1392415964, now seen corresponding path program 11 times [2022-11-16 11:37:26,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:26,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090079877] [2022-11-16 11:37:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:26,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 26 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:28,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:28,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090079877] [2022-11-16 11:37:28,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090079877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:28,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088091732] [2022-11-16 11:37:28,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:37:28,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:28,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:28,632 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:28,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:37:29,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-16 11:37:29,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:29,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-16 11:37:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:29,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:37:29,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 11:37:29,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:37:30,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:37:30,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:37:31,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:37:31,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:37:31,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:37:32,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:37:32,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:37:32,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-11-16 11:37:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 45 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:32,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:36,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:37:36,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:37:36,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:37:36,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:37:36,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:37:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 45 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:38,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088091732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:37:38,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:37:38,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 27] total 86 [2022-11-16 11:37:38,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813735823] [2022-11-16 11:37:38,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:37:38,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-16 11:37:38,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:37:38,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-16 11:37:38,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=6833, Unknown=5, NotChecked=0, Total=7310 [2022-11-16 11:37:38,074 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 86 states, 86 states have (on average 2.5930232558139537) internal successors, (223), 86 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:37:42,966 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2022-11-16 11:37:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 11:37:42,967 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.5930232558139537) internal successors, (223), 86 states have internal predecessors, (223), 0 states have call successors, (0), 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 77 [2022-11-16 11:37:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:37:42,967 INFO L225 Difference]: With dead ends: 136 [2022-11-16 11:37:42,967 INFO L226 Difference]: Without dead ends: 93 [2022-11-16 11:37:42,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1023, Invalid=13252, Unknown=5, NotChecked=0, Total=14280 [2022-11-16 11:37:42,969 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 149 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:37:42,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 989 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 510 Invalid, 0 Unknown, 340 Unchecked, 0.5s Time] [2022-11-16 11:37:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-16 11:37:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2022-11-16 11:37:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-11-16 11:37:42,972 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 77 [2022-11-16 11:37:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:37:42,973 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-11-16 11:37:42,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.5930232558139537) internal successors, (223), 86 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:37:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-11-16 11:37:42,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-16 11:37:42,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:37:42,974 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:37:42,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 11:37:43,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 11:37:43,183 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:37:43,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:37:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash -2138844579, now seen corresponding path program 12 times [2022-11-16 11:37:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:37:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575861146] [2022-11-16 11:37:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:37:43,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:37:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:37:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 30 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:46,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:37:46,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575861146] [2022-11-16 11:37:46,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575861146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:37:46,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623301489] [2022-11-16 11:37:46,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:37:46,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:37:46,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:37:46,215 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:37:46,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:37:46,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-16 11:37:46,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:37:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 149 conjunts are in the unsatisfiable core [2022-11-16 11:37:46,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:37:46,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:37:47,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:37:48,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:37:48,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:48,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:48,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:48,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:48,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:37:48,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:37:49,050 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 [2022-11-16 11:37:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 30 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:37:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:37:49,076 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1057 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1057) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|))) is different from false [2022-11-16 11:37:49,087 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1057 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1057) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:37:49,104 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1057 (Array Int Int)) (v_ArrVal_1056 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1056) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1057) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:37:49,276 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1057 (Array Int Int)) (v_ArrVal_1055 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1055) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1057) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:37:49,287 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1057 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1057) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:37:53,194 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1057 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1057) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-11-16 11:37:57,629 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1057 (Array Int Int)) (v_ArrVal_1052 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1052) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1057) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:38:00,092 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1057 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1057) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:38:00,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:38:00,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:38:00,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:38:00,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:38:00,922 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 30 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 114 not checked. [2022-11-16 11:38:00,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623301489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:00,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:00,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 77 [2022-11-16 11:38:00,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530922298] [2022-11-16 11:38:00,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:00,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-16 11:38:00,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:00,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-16 11:38:00,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4340, Unknown=144, NotChecked=1128, Total=5852 [2022-11-16 11:38:00,925 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 77 states, 77 states have (on average 2.4935064935064934) internal successors, (192), 77 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:04,399 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2022-11-16 11:38:04,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 11:38:04,400 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.4935064935064934) internal successors, (192), 77 states have internal predecessors, (192), 0 states have call successors, (0), 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 87 [2022-11-16 11:38:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:04,401 INFO L225 Difference]: With dead ends: 144 [2022-11-16 11:38:04,401 INFO L226 Difference]: Without dead ends: 95 [2022-11-16 11:38:04,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 138 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=388, Invalid=7155, Unknown=145, NotChecked=1432, Total=9120 [2022-11-16 11:38:04,403 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 61 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 2205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 773 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:04,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1414 Invalid, 2205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1410 Invalid, 0 Unknown, 773 Unchecked, 1.1s Time] [2022-11-16 11:38:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-16 11:38:04,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2022-11-16 11:38:04,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-11-16 11:38:04,407 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2022-11-16 11:38:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:04,407 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-11-16 11:38:04,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.4935064935064934) internal successors, (192), 77 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-11-16 11:38:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-16 11:38:04,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:04,409 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:04,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:04,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:04,631 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:38:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:04,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1788632736, now seen corresponding path program 13 times [2022-11-16 11:38:04,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:04,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78921231] [2022-11-16 11:38:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:04,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 66 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:06,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:06,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78921231] [2022-11-16 11:38:06,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78921231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:06,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610574719] [2022-11-16 11:38:06,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:38:06,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:06,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:06,181 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:06,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:38:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:06,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-16 11:38:06,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 91 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:07,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:08,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:38:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 91 proven. 213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:08,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610574719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:08,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:08,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 49 [2022-11-16 11:38:08,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74651322] [2022-11-16 11:38:08,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:08,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 11:38:08,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:08,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 11:38:08,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:38:08,648 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 50 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 50 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:11,035 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2022-11-16 11:38:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 11:38:11,035 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 50 states have internal predecessors, (183), 0 states have call successors, (0), 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 91 [2022-11-16 11:38:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:11,036 INFO L225 Difference]: With dead ends: 100 [2022-11-16 11:38:11,036 INFO L226 Difference]: Without dead ends: 100 [2022-11-16 11:38:11,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 146 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=984, Invalid=4128, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 11:38:11,037 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 585 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:11,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 651 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:38:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-16 11:38:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-11-16 11:38:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-11-16 11:38:11,041 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 91 [2022-11-16 11:38:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:11,041 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-11-16 11:38:11,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 50 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-11-16 11:38:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-16 11:38:11,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:11,043 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:11,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-16 11:38:11,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:38:11,250 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:38:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:11,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1984621730, now seen corresponding path program 14 times [2022-11-16 11:38:11,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:11,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516639622] [2022-11-16 11:38:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:11,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 34 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:14,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516639622] [2022-11-16 11:38:14,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516639622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:14,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966666425] [2022-11-16 11:38:14,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:38:14,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:14,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:14,444 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:14,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:38:14,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:38:14,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 155 conjunts are in the unsatisfiable core [2022-11-16 11:38:14,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:14,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:38:15,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:38:16,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:38:16,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:38:16,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:38:17,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:38:17,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:38:18,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:38:18,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:38:19,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:38:19,784 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:38:19,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-16 11:38:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 91 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:20,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:29,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:38:29,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:38:29,670 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:38:29,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-16 11:38:29,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 11:38:29,686 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 11 treesize of output 7 [2022-11-16 11:38:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 91 proven. 263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:31,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966666425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:38:31,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:38:31,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 34, 34] total 108 [2022-11-16 11:38:31,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270706673] [2022-11-16 11:38:31,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:38:31,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-16 11:38:31,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:38:31,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-16 11:38:31,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=10882, Unknown=10, NotChecked=0, Total=11556 [2022-11-16 11:38:31,441 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 108 states, 108 states have (on average 2.6203703703703702) internal successors, (283), 108 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:38:42,449 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2022-11-16 11:38:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-16 11:38:42,450 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.6203703703703702) internal successors, (283), 108 states have internal predecessors, (283), 0 states have call successors, (0), 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 97 [2022-11-16 11:38:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:38:42,451 INFO L225 Difference]: With dead ends: 166 [2022-11-16 11:38:42,451 INFO L226 Difference]: Without dead ends: 111 [2022-11-16 11:38:42,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4168 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=1418, Invalid=20624, Unknown=10, NotChecked=0, Total=22052 [2022-11-16 11:38:42,454 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 302 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1579 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 866 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:38:42,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1579 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 728 Invalid, 0 Unknown, 866 Unchecked, 0.6s Time] [2022-11-16 11:38:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-16 11:38:42,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2022-11-16 11:38:42,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 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) [2022-11-16 11:38:42,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-11-16 11:38:42,458 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 97 [2022-11-16 11:38:42,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:38:42,459 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-11-16 11:38:42,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.6203703703703702) internal successors, (283), 108 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:38:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-11-16 11:38:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-16 11:38:42,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:38:42,461 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:38:42,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:38:42,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:42,668 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:38:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:38:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash -682858529, now seen corresponding path program 15 times [2022-11-16 11:38:42,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:38:42,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102157917] [2022-11-16 11:38:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:38:42,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:38:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:38:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:46,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:38:46,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102157917] [2022-11-16 11:38:46,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102157917] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:38:46,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304206036] [2022-11-16 11:38:46,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:38:46,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:38:46,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:38:46,421 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:38:46,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:38:48,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 11:38:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:38:48,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 236 conjunts are in the unsatisfiable core [2022-11-16 11:38:48,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:38:48,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:38:49,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:38:50,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:50,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:51,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:51,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:51,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:52,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:52,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:53,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:53,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:38:53,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:38:53,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:38:53,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:38:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:38:53,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:38:53,796 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1331 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1331) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-11-16 11:38:54,005 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1331 (Array Int Int)) (v_ArrVal_1330 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1330) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1331) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:39:02,446 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1327 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1327) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-11-16 11:39:02,952 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_1325 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1325) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-11-16 11:39:03,384 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_1323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0))) is different from false [2022-11-16 11:39:03,620 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1323 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_1323) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-11-16 11:39:03,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:39:03,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:39:03,832 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:39:03,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:39:03,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:39:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 70 not checked. [2022-11-16 11:39:05,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304206036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:05,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:39:05,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 37, 37] total 107 [2022-11-16 11:39:05,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237584994] [2022-11-16 11:39:05,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:05,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-16 11:39:05,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:05,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-16 11:39:05,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=9642, Unknown=123, NotChecked=1218, Total=11342 [2022-11-16 11:39:05,342 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 107 states, 107 states have (on average 2.6261682242990654) internal successors, (281), 107 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:08,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:08,932 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2022-11-16 11:39:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 11:39:08,933 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.6261682242990654) internal successors, (281), 107 states have internal predecessors, (281), 0 states have call successors, (0), 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 107 [2022-11-16 11:39:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:08,934 INFO L225 Difference]: With dead ends: 176 [2022-11-16 11:39:08,934 INFO L226 Difference]: Without dead ends: 115 [2022-11-16 11:39:08,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 148 SyntacticMatches, 11 SemanticMatches, 124 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 4265 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=499, Invalid=13681, Unknown=124, NotChecked=1446, Total=15750 [2022-11-16 11:39:08,936 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 35 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 979 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:08,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2264 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1076 Invalid, 0 Unknown, 979 Unchecked, 0.8s Time] [2022-11-16 11:39:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-16 11:39:08,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2022-11-16 11:39:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-11-16 11:39:08,940 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2022-11-16 11:39:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:08,940 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-11-16 11:39:08,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.6261682242990654) internal successors, (281), 107 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-11-16 11:39:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 11:39:08,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:08,946 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:08,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:39:09,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:09,147 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:39:09,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1213254494, now seen corresponding path program 16 times [2022-11-16 11:39:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:39:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776397714] [2022-11-16 11:39:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:39:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 120 proven. 360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:10,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:10,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776397714] [2022-11-16 11:39:10,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776397714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:39:10,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577097575] [2022-11-16 11:39:10,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:39:10,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:10,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:10,646 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:10,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:39:11,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:39:11,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:39:11,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-16 11:39:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 153 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:12,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:13,866 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 18 [2022-11-16 11:39:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 153 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:14,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577097575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:14,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:39:14,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 66 [2022-11-16 11:39:14,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495098042] [2022-11-16 11:39:14,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:14,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-16 11:39:14,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:14,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-16 11:39:14,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=3901, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 11:39:14,725 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 67 states, 66 states have (on average 4.015151515151516) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:17,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:39:17,224 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2022-11-16 11:39:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:39:17,224 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.015151515151516) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 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 111 [2022-11-16 11:39:17,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:39:17,225 INFO L225 Difference]: With dead ends: 120 [2022-11-16 11:39:17,225 INFO L226 Difference]: Without dead ends: 120 [2022-11-16 11:39:17,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1802, Invalid=6754, Unknown=0, NotChecked=0, Total=8556 [2022-11-16 11:39:17,227 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 851 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:39:17,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 811 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:39:17,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-16 11:39:17,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-11-16 11:39:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-11-16 11:39:17,232 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 111 [2022-11-16 11:39:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:39:17,232 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-11-16 11:39:17,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.015151515151516) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:39:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-11-16 11:39:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-16 11:39:17,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:39:17,235 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:39:17,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 11:39:17,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:17,444 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:39:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:39:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash 547086304, now seen corresponding path program 17 times [2022-11-16 11:39:17,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:39:17,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17784604] [2022-11-16 11:39:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:39:17,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:39:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:39:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 42 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:22,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:39:22,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17784604] [2022-11-16 11:39:22,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17784604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:39:22,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639606020] [2022-11-16 11:39:22,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:39:22,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:39:22,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:39:22,027 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:39:22,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:39:25,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-16 11:39:25,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:39:25,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 189 conjunts are in the unsatisfiable core [2022-11-16 11:39:25,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:39:25,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:39:25,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-16 11:39:26,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:39:27,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:27,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:27,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:28,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:28,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:29,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:29,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:30,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:30,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:30,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:39:31,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:39:31,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 15 [2022-11-16 11:39:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 153 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:31,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:39:48,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:39:48,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:39:48,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:39:48,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:39:48,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:39:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 153 proven. 389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:39:51,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639606020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:39:51,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:39:51,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 39, 39] total 126 [2022-11-16 11:39:51,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920857820] [2022-11-16 11:39:51,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:39:51,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-11-16 11:39:51,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:39:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-11-16 11:39:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=913, Invalid=14827, Unknown=10, NotChecked=0, Total=15750 [2022-11-16 11:39:51,973 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 126 states, 126 states have (on average 2.7222222222222223) internal successors, (343), 126 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:03,115 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2022-11-16 11:40:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-16 11:40:03,116 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.7222222222222223) internal successors, (343), 126 states have internal predecessors, (343), 0 states have call successors, (0), 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 117 [2022-11-16 11:40:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:03,117 INFO L225 Difference]: With dead ends: 198 [2022-11-16 11:40:03,117 INFO L226 Difference]: Without dead ends: 131 [2022-11-16 11:40:03,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5987 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=1944, Invalid=28846, Unknown=10, NotChecked=0, Total=30800 [2022-11-16 11:40:03,120 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 330 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 703 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:03,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 1881 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 780 Invalid, 0 Unknown, 703 Unchecked, 0.7s Time] [2022-11-16 11:40:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-16 11:40:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2022-11-16 11:40:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-11-16 11:40:03,124 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 117 [2022-11-16 11:40:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:03,125 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-11-16 11:40:03,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.7222222222222223) internal successors, (343), 126 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-11-16 11:40:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-16 11:40:03,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:03,127 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:03,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:03,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:03,338 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:40:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:03,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1821215585, now seen corresponding path program 18 times [2022-11-16 11:40:03,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:03,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971918279] [2022-11-16 11:40:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:03,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 46 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:08,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:08,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971918279] [2022-11-16 11:40:08,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971918279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:08,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731947773] [2022-11-16 11:40:08,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:40:08,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:08,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:08,272 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:08,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 11:40:16,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-16 11:40:16,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:40:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 272 conjunts are in the unsatisfiable core [2022-11-16 11:40:16,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:16,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:40:17,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:40:18,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:18,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:19,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:19,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:20,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:20,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:21,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:21,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:21,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:22,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:22,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:40:23,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:40:23,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:40:23,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:40:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 46 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:23,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:31,665 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1658 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1658) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:40:36,005 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1658 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1658) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-11-16 11:40:36,022 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1658 (Array Int Int)) (v_ArrVal_1654 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1654) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_1658) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-11-16 11:40:44,960 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_1648 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_1648) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0))) is different from false [2022-11-16 11:40:45,716 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:40:45,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:40:45,727 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:40:45,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:40:45,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:40:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 46 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 122 not checked. [2022-11-16 11:40:47,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731947773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:47,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:40:47,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 43, 43] total 128 [2022-11-16 11:40:47,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809894393] [2022-11-16 11:40:47,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:47,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-11-16 11:40:47,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:40:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-11-16 11:40:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=14499, Unknown=325, NotChecked=988, Total=16256 [2022-11-16 11:40:47,975 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 128 states, 128 states have (on average 2.6875) internal successors, (344), 128 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:54,956 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2022-11-16 11:40:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-16 11:40:54,957 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.6875) internal successors, (344), 128 states have internal predecessors, (344), 0 states have call successors, (0), 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 127 [2022-11-16 11:40:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:54,958 INFO L225 Difference]: With dead ends: 208 [2022-11-16 11:40:54,958 INFO L226 Difference]: Without dead ends: 135 [2022-11-16 11:40:54,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 186 SyntacticMatches, 4 SemanticMatches, 160 ConstructedPredicates, 4 IntricatePredicates, 3 DeprecatedPredicates, 6834 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=703, Invalid=23789, Unknown=330, NotChecked=1260, Total=26082 [2022-11-16 11:40:54,961 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 66 mSDsluCounter, 3365 mSDsCounter, 0 mSdLazyCounter, 2842 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 3416 SdHoareTripleChecker+Invalid, 5102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2236 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:54,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 3416 Invalid, 5102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2842 Invalid, 0 Unknown, 2236 Unchecked, 2.1s Time] [2022-11-16 11:40:54,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-16 11:40:54,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2022-11-16 11:40:54,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 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) [2022-11-16 11:40:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-11-16 11:40:54,965 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 127 [2022-11-16 11:40:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:54,966 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-11-16 11:40:54,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.6875) internal successors, (344), 128 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:40:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-11-16 11:40:54,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 11:40:54,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:54,968 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:54,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:55,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 11:40:55,179 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:40:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1005234012, now seen corresponding path program 19 times [2022-11-16 11:40:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:40:55,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100349711] [2022-11-16 11:40:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:55,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:40:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 190 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:57,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:40:57,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100349711] [2022-11-16 11:40:57,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100349711] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:57,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942605474] [2022-11-16 11:40:57,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:40:57,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:40:57,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:57,595 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:40:57,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 11:40:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-16 11:40:57,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 231 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:59,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:00,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:41:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 231 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:01,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942605474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:01,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:41:01,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 65 [2022-11-16 11:41:01,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398958279] [2022-11-16 11:41:01,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:01,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-16 11:41:01,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:01,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-16 11:41:01,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=3843, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 11:41:01,260 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 66 states, 65 states have (on average 4.046153846153846) internal successors, (263), 66 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:05,220 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-11-16 11:41:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 11:41:05,220 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.046153846153846) internal successors, (263), 66 states have internal predecessors, (263), 0 states have call successors, (0), 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 131 [2022-11-16 11:41:05,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:05,221 INFO L225 Difference]: With dead ends: 140 [2022-11-16 11:41:05,221 INFO L226 Difference]: Without dead ends: 140 [2022-11-16 11:41:05,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 214 SyntacticMatches, 13 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1752, Invalid=7368, Unknown=0, NotChecked=0, Total=9120 [2022-11-16 11:41:05,222 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 809 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 2020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:05,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 1126 Invalid, 2020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 11:41:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-16 11:41:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-11-16 11:41:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-11-16 11:41:05,226 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 131 [2022-11-16 11:41:05,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:05,227 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-11-16 11:41:05,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.046153846153846) internal successors, (263), 66 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:41:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-11-16 11:41:05,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-16 11:41:05,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:05,228 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:05,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-16 11:41:05,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:05,436 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:41:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:05,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1834780062, now seen corresponding path program 20 times [2022-11-16 11:41:05,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:05,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262840893] [2022-11-16 11:41:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:05,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 50 proven. 720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:41:11,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262840893] [2022-11-16 11:41:11,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262840893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:11,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016366289] [2022-11-16 11:41:11,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:41:11,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:11,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:11,460 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:11,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 11:41:11,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:41:11,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:11,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 213 conjunts are in the unsatisfiable core [2022-11-16 11:41:11,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:11,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:41:13,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:41:13,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:14,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:14,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:15,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:15,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:16,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:16,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:17,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:18,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:18,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:19,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:19,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:41:20,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:41:20,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-16 11:41:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 231 proven. 539 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:20,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:38,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:41:38,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:41:38,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:41:38,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-16 11:41:38,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 11:41:38,144 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 11 treesize of output 7 [2022-11-16 11:41:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 231 proven. 539 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:41,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016366289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:41,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:41:41,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 46, 46] total 148 [2022-11-16 11:41:41,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040071641] [2022-11-16 11:41:41,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:41,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-11-16 11:41:41,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:41:41,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-11-16 11:41:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1171, Invalid=20572, Unknown=13, NotChecked=0, Total=21756 [2022-11-16 11:41:41,139 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 148 states, 148 states have (on average 2.722972972972973) internal successors, (403), 148 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:04,208 INFO L93 Difference]: Finished difference Result 232 states and 233 transitions. [2022-11-16 11:42:04,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-16 11:42:04,209 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.722972972972973) internal successors, (403), 148 states have internal predecessors, (403), 0 states have call successors, (0), 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 137 [2022-11-16 11:42:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:04,211 INFO L225 Difference]: With dead ends: 232 [2022-11-16 11:42:04,211 INFO L226 Difference]: Without dead ends: 153 [2022-11-16 11:42:04,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8400 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=2461, Invalid=39346, Unknown=13, NotChecked=0, Total=41820 [2022-11-16 11:42:04,214 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 547 mSDsluCounter, 2915 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 737 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:04,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 2972 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1240 Invalid, 0 Unknown, 737 Unchecked, 0.9s Time] [2022-11-16 11:42:04,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-16 11:42:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2022-11-16 11:42:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-11-16 11:42:04,220 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 137 [2022-11-16 11:42:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:04,220 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-11-16 11:42:04,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.722972972972973) internal successors, (403), 148 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:04,221 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-11-16 11:42:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-16 11:42:04,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:04,223 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:04,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:04,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 11:42:04,431 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:42:04,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:04,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1006091491, now seen corresponding path program 21 times [2022-11-16 11:42:04,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:04,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653070552] [2022-11-16 11:42:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:04,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 54 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:11,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:42:11,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653070552] [2022-11-16 11:42:11,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653070552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:11,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000624766] [2022-11-16 11:42:11,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:42:11,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:42:11,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:42:11,296 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:42:11,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 11:42:19,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-16 11:42:19,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:42:19,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 308 conjunts are in the unsatisfiable core [2022-11-16 11:42:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:19,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:42:21,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:42:22,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:22,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:23,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:23,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:24,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:24,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:24,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:25,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:25,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:26,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:26,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:27,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:27,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:42:28,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:42:28,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:28,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:42:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 54 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:42:28,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:28,500 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2037 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2037) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:42:32,894 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2037 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2037) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:42:32,908 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2037 (Array Int Int)) (v_ArrVal_2035 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2035) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2037) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:42:33,156 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2037 (Array Int Int)) (v_ArrVal_2034 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2034) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2037) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:42:33,167 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2037 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2037) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-11-16 11:42:39,874 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2037 (Array Int Int)) (v_ArrVal_2032 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2032) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2037) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:42:44,843 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2030 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2030) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-11-16 11:42:44,990 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2029 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2029) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0))) is different from false [2022-11-16 11:42:45,979 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2026 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2026) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0))) is different from false [2022-11-16 11:42:46,092 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2025 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2025) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-11-16 11:42:46,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:46,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:42:46,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:46,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:42:46,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:42:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 54 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 278 not checked. [2022-11-16 11:42:49,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000624766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:49,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:42:49,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 49, 49] total 146 [2022-11-16 11:42:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218200541] [2022-11-16 11:42:49,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:49,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-11-16 11:42:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:42:49,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-11-16 11:42:49,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=17632, Unknown=283, NotChecked=2770, Total=21170 [2022-11-16 11:42:49,492 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 146 states, 146 states have (on average 2.7260273972602738) internal successors, (398), 146 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:58,141 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2022-11-16 11:42:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 11:42:58,142 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.7260273972602738) internal successors, (398), 146 states have internal predecessors, (398), 0 states have call successors, (0), 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 147 [2022-11-16 11:42:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:58,143 INFO L225 Difference]: With dead ends: 240 [2022-11-16 11:42:58,143 INFO L226 Difference]: Without dead ends: 155 [2022-11-16 11:42:58,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 216 SyntacticMatches, 6 SemanticMatches, 183 ConstructedPredicates, 10 IntricatePredicates, 4 DeprecatedPredicates, 8405 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=772, Invalid=29433, Unknown=285, NotChecked=3550, Total=34040 [2022-11-16 11:42:58,146 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 66 mSDsluCounter, 4178 mSDsCounter, 0 mSdLazyCounter, 3041 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 4237 SdHoareTripleChecker+Invalid, 6000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2936 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:58,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 4237 Invalid, 6000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3041 Invalid, 0 Unknown, 2936 Unchecked, 2.3s Time] [2022-11-16 11:42:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-16 11:42:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2022-11-16 11:42:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-11-16 11:42:58,150 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2022-11-16 11:42:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:58,153 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-11-16 11:42:58,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.7260273972602738) internal successors, (398), 146 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:42:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-11-16 11:42:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-16 11:42:58,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:58,155 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:58,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:58,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 11:42:58,368 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:42:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:58,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1386171046, now seen corresponding path program 22 times [2022-11-16 11:42:58,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:42:58,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139349739] [2022-11-16 11:42:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:58,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:42:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 276 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:01,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139349739] [2022-11-16 11:43:01,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139349739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:01,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899315312] [2022-11-16 11:43:01,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:43:01,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:01,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:01,351 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:43:01,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 11:43:03,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:43:03,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:43:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 150 conjunts are in the unsatisfiable core [2022-11-16 11:43:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:03,601 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:43:03,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:43:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 325 proven. 627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:05,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 325 proven. 627 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:08,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899315312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:43:08,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:43:08,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 86 [2022-11-16 11:43:08,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829341197] [2022-11-16 11:43:08,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:08,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-16 11:43:08,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:08,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-16 11:43:08,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=6530, Unknown=0, NotChecked=0, Total=7482 [2022-11-16 11:43:08,870 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 87 states, 86 states have (on average 4.1976744186046515) internal successors, (361), 87 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:12,931 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2022-11-16 11:43:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:43:12,931 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 4.1976744186046515) internal successors, (361), 87 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2022-11-16 11:43:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:12,932 INFO L225 Difference]: With dead ends: 160 [2022-11-16 11:43:12,933 INFO L226 Difference]: Without dead ends: 160 [2022-11-16 11:43:12,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3151 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3109, Invalid=11411, Unknown=0, NotChecked=0, Total=14520 [2022-11-16 11:43:12,934 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 1116 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1333 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:12,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 1333 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 11:43:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-16 11:43:12,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2022-11-16 11:43:12,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:12,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2022-11-16 11:43:12,939 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 151 [2022-11-16 11:43:12,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:12,939 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2022-11-16 11:43:12,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 4.1976744186046515) internal successors, (361), 87 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2022-11-16 11:43:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-16 11:43:12,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:12,940 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:12,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:13,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 11:43:13,141 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:43:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1681679076, now seen corresponding path program 23 times [2022-11-16 11:43:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:13,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104281953] [2022-11-16 11:43:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 58 proven. 980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:20,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:20,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104281953] [2022-11-16 11:43:20,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104281953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:20,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134334998] [2022-11-16 11:43:20,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:43:20,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:43:20,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:20,438 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:43:20,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 11:43:27,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-16 11:43:27,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:43:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 328 conjunts are in the unsatisfiable core [2022-11-16 11:43:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:27,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:43:29,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:43:30,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:30,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:31,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:31,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:32,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:32,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:33,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:33,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:34,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:34,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:34,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:35,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:35,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:36,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:43:36,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:43:36,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:43:36,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 11:43:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 58 proven. 980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:36,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:36,843 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2313) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-11-16 11:43:36,857 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2313) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:43:45,841 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2313) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:43:51,610 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2313 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2313) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)))) is different from false [2022-11-16 11:43:56,295 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2313 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2313) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:44:04,729 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2306 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2306) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-11-16 11:44:05,804 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2303 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2303) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 10)) 0))) is different from false [2022-11-16 11:44:05,974 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2302 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2302) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 11)) 0))) is different from false [2022-11-16 11:44:06,125 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2301 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2301) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-11-16 11:44:06,912 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2300 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_2300) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-11-16 11:44:06,920 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2300 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2300) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 14 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-16 11:44:06,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:06,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:44:06,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:06,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:44:06,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:44:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 58 proven. 668 refuted. 0 times theorem prover too weak. 0 trivial. 312 not checked. [2022-11-16 11:44:09,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134334998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:09,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:09,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 52, 52] total 155 [2022-11-16 11:44:09,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127225679] [2022-11-16 11:44:09,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:09,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-11-16 11:44:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:09,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-11-16 11:44:09,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=19841, Unknown=281, NotChecked=3234, Total=23870 [2022-11-16 11:44:09,799 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 155 states, 155 states have (on average 2.7419354838709675) internal successors, (425), 155 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:17,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:17,351 INFO L93 Difference]: Finished difference Result 256 states and 257 transitions. [2022-11-16 11:44:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-16 11:44:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.7419354838709675) internal successors, (425), 155 states have internal predecessors, (425), 0 states have call successors, (0), 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 157 [2022-11-16 11:44:17,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:17,352 INFO L225 Difference]: With dead ends: 256 [2022-11-16 11:44:17,352 INFO L226 Difference]: Without dead ends: 165 [2022-11-16 11:44:17,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 218 SyntacticMatches, 17 SemanticMatches, 182 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 9219 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=722, Invalid=28797, Unknown=281, NotChecked=3872, Total=33672 [2022-11-16 11:44:17,354 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 43 mSDsluCounter, 4587 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 4649 SdHoareTripleChecker+Invalid, 4802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2166 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:17,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 4649 Invalid, 4802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2620 Invalid, 0 Unknown, 2166 Unchecked, 1.9s Time] [2022-11-16 11:44:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-16 11:44:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2022-11-16 11:44:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2022-11-16 11:44:17,359 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 157 [2022-11-16 11:44:17,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:17,360 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2022-11-16 11:44:17,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.7419354838709675) internal successors, (425), 155 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:44:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2022-11-16 11:44:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-16 11:44:17,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:17,362 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:17,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:17,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-16 11:44:17,575 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:44:17,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash -154412825, now seen corresponding path program 24 times [2022-11-16 11:44:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:44:17,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373077453] [2022-11-16 11:44:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:17,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:44:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 325 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:20,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:44:20,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373077453] [2022-11-16 11:44:20,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373077453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:20,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135069925] [2022-11-16 11:44:20,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:44:20,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:44:20,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:44:20,559 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:44:20,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 11:44:49,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-16 11:44:49,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:44:49,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-16 11:44:49,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:49,639 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:49,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:44:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 378 proven. 717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:52,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 378 proven. 717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:44:55,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135069925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:55,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:44:55,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 109 [2022-11-16 11:44:55,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327675015] [2022-11-16 11:44:55,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:55,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-11-16 11:44:55,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:44:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-11-16 11:44:55,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1543, Invalid=10447, Unknown=0, NotChecked=0, Total=11990 [2022-11-16 11:44:55,924 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 110 states, 109 states have (on average 4.3577981651376145) internal successors, (475), 110 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:00,477 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2022-11-16 11:45:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 11:45:00,478 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 4.3577981651376145) internal successors, (475), 110 states have internal predecessors, (475), 0 states have call successors, (0), 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 161 [2022-11-16 11:45:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:00,480 INFO L225 Difference]: With dead ends: 170 [2022-11-16 11:45:00,480 INFO L226 Difference]: Without dead ends: 170 [2022-11-16 11:45:00,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5495 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=4269, Invalid=16901, Unknown=0, NotChecked=0, Total=21170 [2022-11-16 11:45:00,483 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1610 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:00,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 1040 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:45:00,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-16 11:45:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2022-11-16 11:45:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:00,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-11-16 11:45:00,488 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 161 [2022-11-16 11:45:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:00,489 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-11-16 11:45:00,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 4.3577981651376145) internal successors, (475), 110 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-11-16 11:45:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-16 11:45:00,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:00,492 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:00,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-16 11:45:00,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-16 11:45:00,707 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:45:00,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:00,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1522236517, now seen corresponding path program 25 times [2022-11-16 11:45:00,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:00,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741445466] [2022-11-16 11:45:00,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:00,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 62 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:07,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741445466] [2022-11-16 11:45:07,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741445466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:07,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149579829] [2022-11-16 11:45:07,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:45:07,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:07,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:07,994 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:07,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 11:45:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:08,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 265 conjunts are in the unsatisfiable core [2022-11-16 11:45:08,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:08,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:45:10,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:45:11,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-16 11:45:11,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:11,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:11,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:11,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:11,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:12,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:12,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:12,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:12,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:12,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:12,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:13,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:13,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:45:13,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:45:13,309 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 [2022-11-16 11:45:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 62 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:13,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:13,641 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:45:13,657 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2607 (Array Int Int)) (v_ArrVal_2606 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2606) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:45:13,921 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2605 (Array Int Int)) (v_ArrVal_2607 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2605) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:45:14,164 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2604 (Array Int Int)) (v_ArrVal_2607 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2604) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)))) is different from false [2022-11-16 11:45:14,172 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 4)) 0)) is different from false [2022-11-16 11:45:24,813 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:45:24,830 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2601 (Array Int Int)) (v_ArrVal_2607 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2601) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:45:24,841 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:45:36,389 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2607 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2607) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:45:41,305 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2593 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2593) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-11-16 11:45:41,932 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2593 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2593) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 15 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-16 11:45:41,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:41,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:45:41,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:41,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:45:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 62 proven. 745 refuted. 0 times theorem prover too weak. 0 trivial. 380 not checked. [2022-11-16 11:45:42,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149579829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:42,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:42,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 55, 55] total 134 [2022-11-16 11:45:42,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503292486] [2022-11-16 11:45:42,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:42,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-11-16 11:45:42,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-11-16 11:45:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=14223, Unknown=404, NotChecked=2772, Total=17822 [2022-11-16 11:45:42,849 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 134 states, 134 states have (on average 2.656716417910448) internal successors, (356), 134 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:51,637 INFO L93 Difference]: Finished difference Result 272 states and 273 transitions. [2022-11-16 11:45:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-16 11:45:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.656716417910448) internal successors, (356), 134 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2022-11-16 11:45:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:51,639 INFO L225 Difference]: With dead ends: 272 [2022-11-16 11:45:51,639 INFO L226 Difference]: Without dead ends: 175 [2022-11-16 11:45:51,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 262 SyntacticMatches, 17 SemanticMatches, 166 ConstructedPredicates, 11 IntricatePredicates, 2 DeprecatedPredicates, 5703 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=674, Invalid=23456, Unknown=406, NotChecked=3520, Total=28056 [2022-11-16 11:45:51,641 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 55 mSDsluCounter, 4797 mSDsCounter, 0 mSdLazyCounter, 4280 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 4863 SdHoareTripleChecker+Invalid, 6933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2616 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:51,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 4863 Invalid, 6933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4280 Invalid, 0 Unknown, 2616 Unchecked, 2.9s Time] [2022-11-16 11:45:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-16 11:45:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2022-11-16 11:45:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:51,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-11-16 11:45:51,646 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2022-11-16 11:45:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:51,647 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-11-16 11:45:51,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.656716417910448) internal successors, (356), 134 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-11-16 11:45:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-16 11:45:51,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:51,649 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:51,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:51,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:51,857 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:45:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:51,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1872595624, now seen corresponding path program 26 times [2022-11-16 11:45:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:51,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944561389] [2022-11-16 11:45:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 378 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:54,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:54,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944561389] [2022-11-16 11:45:54,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944561389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:54,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341911556] [2022-11-16 11:45:54,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:45:54,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:54,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:54,412 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:54,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 11:45:54,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:45:54,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 162 conjunts are in the unsatisfiable core [2022-11-16 11:45:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 435 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:56,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:58,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 11:45:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 435 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:59,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341911556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:59,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:59,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 81 [2022-11-16 11:45:59,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21161959] [2022-11-16 11:45:59,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:59,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-16 11:45:59,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:59,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-16 11:45:59,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=5935, Unknown=0, NotChecked=0, Total=6642 [2022-11-16 11:45:59,085 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 82 states, 81 states have (on average 4.234567901234568) internal successors, (343), 82 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:03,607 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-11-16 11:46:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 11:46:03,607 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 4.234567901234568) internal successors, (343), 82 states have internal predecessors, (343), 0 states have call successors, (0), 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 171 [2022-11-16 11:46:03,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:03,609 INFO L225 Difference]: With dead ends: 180 [2022-11-16 11:46:03,609 INFO L226 Difference]: Without dead ends: 180 [2022-11-16 11:46:03,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 282 SyntacticMatches, 17 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3929 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2744, Invalid=11536, Unknown=0, NotChecked=0, Total=14280 [2022-11-16 11:46:03,610 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 1251 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 3071 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:03,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 1762 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3071 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 11:46:03,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-16 11:46:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2022-11-16 11:46:03,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-11-16 11:46:03,613 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 171 [2022-11-16 11:46:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:03,613 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-11-16 11:46:03,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 4.234567901234568) internal successors, (343), 82 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:46:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-11-16 11:46:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-16 11:46:03,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:03,615 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:46:03,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:03,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:03,823 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:46:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:03,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1129781606, now seen corresponding path program 27 times [2022-11-16 11:46:03,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:03,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676403684] [2022-11-16 11:46:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:03,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 66 proven. 1280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:11,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:11,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676403684] [2022-11-16 11:46:11,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676403684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:11,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732192677] [2022-11-16 11:46:11,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:46:11,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:11,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:11,720 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:11,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-16 11:47:23,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-16 11:47:23,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 375 conjunts are in the unsatisfiable core [2022-11-16 11:47:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:23,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 11:47:26,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-16 11:47:27,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:27,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:28,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:28,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:29,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:29,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:30,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:30,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:31,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:31,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:32,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:33,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:33,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:34,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:34,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:35,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:35,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:47:35,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-16 11:47:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 66 proven. 1280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:35,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:35,900 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2915 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2915) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|) 0)) is different from false [2022-11-16 11:47:35,912 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2915 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2915) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 1)) 0)) is different from false [2022-11-16 11:47:47,300 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2912 (Array Int Int)) (v_ArrVal_2915 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2912) |c_ULTIMATE.start_cstrncpy_~d~0#1.base| v_ArrVal_2915) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0)) is different from false [2022-11-16 11:47:48,064 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2910 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2910) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-11-16 11:47:48,292 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2909 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2909) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 6 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-11-16 11:47:48,484 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2908 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2908) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 7 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|))))) is different from false [2022-11-16 11:47:48,660 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2907 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2907) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 8)) 0))) is different from false [2022-11-16 11:47:48,830 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2906 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2906) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 9 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-11-16 11:47:49,979 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2903 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2903) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 12)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-11-16 11:47:50,607 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|)) (forall ((v_ArrVal_2901 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2901) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ 14 |c_ULTIMATE.start_cstrncpy_~s~0#1.offset|)) 0))) is different from false [2022-11-16 11:47:50,734 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_#t~post3#1.base| v_ArrVal_2900) |c_ULTIMATE.start_cstrncpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncpy_~s~0#1.offset| 15)) 0)) (not (= |c_ULTIMATE.start_cstrncpy_~d~0#1.base| |c_ULTIMATE.start_cstrncpy_~s~0#1.base|))) is different from false [2022-11-16 11:47:51,036 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncpy_~dst#1.base| v_ArrVal_2900) |c_ULTIMATE.start_cstrncpy_~src#1.base|) (+ 16 |c_ULTIMATE.start_cstrncpy_~src#1.offset|)) 0)) is different from false [2022-11-16 11:47:51,044 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2900 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_2900) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2022-11-16 11:47:51,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:47:51,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-16 11:47:51,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:47:51,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 11:47:51,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 11:47:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 66 proven. 988 refuted. 0 times theorem prover too weak. 0 trivial. 292 not checked. [2022-11-16 11:47:54,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732192677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:54,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:54,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 58, 58] total 171 [2022-11-16 11:47:54,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146754107] [2022-11-16 11:47:54,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:54,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-11-16 11:47:54,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:54,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-11-16 11:47:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=24078, Unknown=222, NotChecked=4212, Total=29070 [2022-11-16 11:47:54,475 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 171 states, 171 states have (on average 2.760233918128655) internal successors, (472), 171 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:04,993 INFO L93 Difference]: Finished difference Result 288 states and 289 transitions. [2022-11-16 11:48:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-16 11:48:04,994 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 2.760233918128655) internal successors, (472), 171 states have internal predecessors, (472), 0 states have call successors, (0), 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 177 [2022-11-16 11:48:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:04,996 INFO L225 Difference]: With dead ends: 288 [2022-11-16 11:48:04,996 INFO L226 Difference]: Without dead ends: 185 [2022-11-16 11:48:04,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 245 SyntacticMatches, 14 SemanticMatches, 212 ConstructedPredicates, 13 IntricatePredicates, 10 DeprecatedPredicates, 11820 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=866, Invalid=39162, Unknown=224, NotChecked=5330, Total=45582 [2022-11-16 11:48:04,999 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 61 mSDsluCounter, 5995 mSDsCounter, 0 mSdLazyCounter, 3152 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 6066 SdHoareTripleChecker+Invalid, 6386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3215 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:04,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 6066 Invalid, 6386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3152 Invalid, 0 Unknown, 3215 Unchecked, 2.2s Time] [2022-11-16 11:48:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-16 11:48:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-11-16 11:48:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2022-11-16 11:48:05,004 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 177 [2022-11-16 11:48:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:05,004 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2022-11-16 11:48:05,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 2.760233918128655) internal successors, (472), 171 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2022-11-16 11:48:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-16 11:48:05,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:05,006 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:05,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:05,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-16 11:48:05,231 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:48:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1621463063, now seen corresponding path program 28 times [2022-11-16 11:48:05,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:05,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858226504] [2022-11-16 11:48:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1411 backedges. 435 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:08,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:08,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858226504] [2022-11-16 11:48:08,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858226504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:08,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938127191] [2022-11-16 11:48:08,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:48:08,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:08,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:08,589 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:08,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 11:48:13,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:48:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:13,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 177 conjunts are in the unsatisfiable core [2022-11-16 11:48:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:13,710 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:48:13,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-16 11:48:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1411 backedges. 435 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:15,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1411 backedges. 465 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:20,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938127191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:48:20,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:48:20,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 103 [2022-11-16 11:48:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533393462] [2022-11-16 11:48:20,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:20,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-16 11:48:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-16 11:48:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1301, Invalid=9411, Unknown=0, NotChecked=0, Total=10712 [2022-11-16 11:48:20,875 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 104 states, 103 states have (on average 4.203883495145631) internal successors, (433), 104 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:26,936 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2022-11-16 11:48:26,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 11:48:26,937 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 4.203883495145631) internal successors, (433), 104 states have internal predecessors, (433), 0 states have call successors, (0), 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 181 [2022-11-16 11:48:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:26,938 INFO L225 Difference]: With dead ends: 190 [2022-11-16 11:48:26,938 INFO L226 Difference]: Without dead ends: 190 [2022-11-16 11:48:26,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4764 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=4229, Invalid=16651, Unknown=0, NotChecked=0, Total=20880 [2022-11-16 11:48:26,940 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 747 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 3211 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1875 SdHoareTripleChecker+Invalid, 3234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:26,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1875 Invalid, 3234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3211 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-16 11:48:26,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-16 11:48:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2022-11-16 11:48:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2022-11-16 11:48:26,945 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 181 [2022-11-16 11:48:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:26,946 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2022-11-16 11:48:26,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 4.203883495145631) internal successors, (433), 104 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:48:26,947 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2022-11-16 11:48:26,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-16 11:48:26,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:26,948 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:26,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:27,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-16 11:48:27,148 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 11:48:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash 394873319, now seen corresponding path program 29 times [2022-11-16 11:48:27,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:27,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761340962] [2022-11-16 11:48:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:27,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1515 backedges. 70 proven. 1445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:48:37,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761340962] [2022-11-16 11:48:37,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761340962] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405061024] [2022-11-16 11:48:37,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:48:37,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:37,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:37,233 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:37,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04e02fa5-e452-43c7-b6e7-aefdfb17c234/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process