./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro --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 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f --- 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-8393723 [2022-11-18 21:04:48,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:04:48,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:04:48,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:04:48,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:04:48,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:04:48,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:04:48,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:04:48,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:04:48,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:04:48,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:04:48,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:04:48,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:04:48,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:04:48,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:04:48,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:04:48,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:04:48,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:04:48,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:04:48,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:04:48,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:04:48,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:04:48,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:04:48,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:04:48,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:04:48,924 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:04:48,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:04:48,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:04:48,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:04:48,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:04:48,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:04:48,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:04:48,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:04:48,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:04:48,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:04:48,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:04:48,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:04:48,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:04:48,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:04:48,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:04:48,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:04:48,941 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 21:04:48,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:04:48,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:04:48,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:04:48,983 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:04:48,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:04:48,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:04:48,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:04:48,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:04:48,986 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:04:48,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:04:48,988 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:04:48,988 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 21:04:48,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:04:48,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:04:48,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:04:48,989 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 21:04:48,989 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 21:04:48,990 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 21:04:48,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:04:48,990 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 21:04:48,990 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:04:48,991 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:04:48,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:04:48,991 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:04:48,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:04:48,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:04:48,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:04:48,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:04:48,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:04:48,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:04:48,994 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_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15fe42cb945ebd9019cc38134c29264613097f232589ff55d01d33d66b19d85f [2022-11-18 21:04:49,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:04:49,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:04:49,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:04:49,313 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:04:49,314 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:04:49,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2022-11-18 21:04:49,388 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/data/a54dc64e2/7585f85ebb1f4740b42d670c17f58f3a/FLAG9ced69122 [2022-11-18 21:04:50,072 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:04:50,072 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2022-11-18 21:04:50,085 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/data/a54dc64e2/7585f85ebb1f4740b42d670c17f58f3a/FLAG9ced69122 [2022-11-18 21:04:50,356 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/data/a54dc64e2/7585f85ebb1f4740b42d670c17f58f3a [2022-11-18 21:04:50,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:04:50,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:04:50,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:04:50,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:04:50,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:04:50,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:50,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c4df84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50, skipping insertion in model container [2022-11-18 21:04:50,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:50,385 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:04:50,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:04:50,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:04:50,896 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:04:50,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:04:50,977 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:04:50,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50 WrapperNode [2022-11-18 21:04:50,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:04:50,979 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:04:50,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:04:50,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:04:50,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,042 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-11-18 21:04:51,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:04:51,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:04:51,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:04:51,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:04:51,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,104 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:04:51,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:04:51,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:04:51,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:04:51,122 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (1/1) ... [2022-11-18 21:04:51,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:04:51,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:51,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:04:51,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:04:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 21:04:51,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 21:04:51,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 21:04:51,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 21:04:51,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:04:51,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:04:51,376 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:04:51,378 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:04:51,681 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:04:51,687 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:04:51,688 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 21:04:51,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:04:51 BoogieIcfgContainer [2022-11-18 21:04:51,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:04:51,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:04:51,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:04:51,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:04:51,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:04:50" (1/3) ... [2022-11-18 21:04:51,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e7b67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:04:51, skipping insertion in model container [2022-11-18 21:04:51,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:04:50" (2/3) ... [2022-11-18 21:04:51,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e7b67a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:04:51, skipping insertion in model container [2022-11-18 21:04:51,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:04:51" (3/3) ... [2022-11-18 21:04:51,700 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca-1.i [2022-11-18 21:04:51,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:04:51,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-11-18 21:04:51,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:04:51,790 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;@591f57a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:04:51,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-11-18 21:04:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 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) [2022-11-18 21:04:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 21:04:51,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:51,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:51,805 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-11-18 21:04:51,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:51,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54504105] [2022-11-18 21:04:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:51,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:52,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:52,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54504105] [2022-11-18 21:04:52,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54504105] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:52,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:52,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:04:52,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264555168] [2022-11-18 21:04:52,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:52,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:52,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:52,312 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) internal successors, (65), 53 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) 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) [2022-11-18 21:04:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:52,438 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-11-18 21:04:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:52,441 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 [2022-11-18 21:04:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:52,453 INFO L225 Difference]: With dead ends: 100 [2022-11-18 21:04:52,453 INFO L226 Difference]: Without dead ends: 96 [2022-11-18 21:04:52,457 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 [2022-11-18 21:04:52,464 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:52,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:04:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-18 21:04:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2022-11-18 21:04:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-11-18 21:04:52,524 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2022-11-18 21:04:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:52,525 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-11-18 21:04:52,525 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) [2022-11-18 21:04:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-11-18 21:04:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 21:04:52,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:52,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:52,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 21:04:52,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:52,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:52,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-11-18 21:04:52,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:52,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679730878] [2022-11-18 21:04:52,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:52,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:52,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:52,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679730878] [2022-11-18 21:04:52,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679730878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:52,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:52,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:04:52,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525769220] [2022-11-18 21:04:52,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:52,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:04:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:04:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:04:52,834 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:52,903 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-11-18 21:04:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:04:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 21:04:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:52,905 INFO L225 Difference]: With dead ends: 53 [2022-11-18 21:04:52,905 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 21:04:52,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:04:52,907 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:52,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:04:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 21:04:52,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-18 21:04:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 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) [2022-11-18 21:04:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-18 21:04:52,913 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-11-18 21:04:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:52,914 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-18 21:04:52,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-18 21:04:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 21:04:52,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:52,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:52,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 21:04:52,926 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:52,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-11-18 21:04:52,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:52,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128731590] [2022-11-18 21:04:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:52,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:53,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:53,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128731590] [2022-11-18 21:04:53,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128731590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:53,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:53,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:04:53,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828608517] [2022-11-18 21:04:53,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:53,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:53,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:53,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:53,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:53,335 INFO L87 Difference]: Start difference. First operand 53 states and 61 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) [2022-11-18 21:04:53,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:53,558 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-11-18 21:04:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:53,559 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 [2022-11-18 21:04:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:53,560 INFO L225 Difference]: With dead ends: 97 [2022-11-18 21:04:53,561 INFO L226 Difference]: Without dead ends: 97 [2022-11-18 21:04:53,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:53,563 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 103 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:53,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 96 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:04:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-18 21:04:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2022-11-18 21:04:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-18 21:04:53,591 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-11-18 21:04:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:53,592 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-18 21:04:53,592 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) [2022-11-18 21:04:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-18 21:04:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 21:04:53,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:53,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:53,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 21:04:53,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:53,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-11-18 21:04:53,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:53,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580777726] [2022-11-18 21:04:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:53,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:53,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:53,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580777726] [2022-11-18 21:04:53,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580777726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:53,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:53,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:04:53,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175285287] [2022-11-18 21:04:53,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:53,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:53,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:53,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:53,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:53,883 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:53,955 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2022-11-18 21:04:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-18 21:04:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:53,958 INFO L225 Difference]: With dead ends: 94 [2022-11-18 21:04:53,959 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 21:04:53,959 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 [2022-11-18 21:04:53,971 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 87 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:53,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 90 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:04:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 21:04:53,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2022-11-18 21:04:53,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 60 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) [2022-11-18 21:04:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-11-18 21:04:53,978 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-11-18 21:04:53,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:53,979 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-11-18 21:04:53,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-11-18 21:04:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 21:04:53,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:53,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:53,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 21:04:53,981 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:53,981 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-11-18 21:04:53,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:53,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586042948] [2022-11-18 21:04:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:53,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:54,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:54,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586042948] [2022-11-18 21:04:54,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586042948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:54,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:54,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:04:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354116190] [2022-11-18 21:04:54,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:54,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:54,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:54,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:54,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:54,029 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:54,053 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2022-11-18 21:04:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:54,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-18 21:04:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:54,055 INFO L225 Difference]: With dead ends: 109 [2022-11-18 21:04:54,055 INFO L226 Difference]: Without dead ends: 109 [2022-11-18 21:04:54,056 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 [2022-11-18 21:04:54,057 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 80 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:54,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 108 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:04:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-18 21:04:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2022-11-18 21:04:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 73 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) [2022-11-18 21:04:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-11-18 21:04:54,065 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 9 [2022-11-18 21:04:54,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:54,066 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-11-18 21:04:54,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-11-18 21:04:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 21:04:54,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:54,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:54,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 21:04:54,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-11-18 21:04:54,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140127883] [2022-11-18 21:04:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:54,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140127883] [2022-11-18 21:04:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140127883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:54,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:54,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:04:54,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458225229] [2022-11-18 21:04:54,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:54,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:04:54,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:54,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:04:54,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:04:54,107 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:54,147 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-11-18 21:04:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:04:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-18 21:04:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:54,149 INFO L225 Difference]: With dead ends: 72 [2022-11-18 21:04:54,149 INFO L226 Difference]: Without dead ends: 72 [2022-11-18 21:04:54,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:04:54,151 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:54,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:04:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-18 21:04:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-18 21:04:54,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-11-18 21:04:54,157 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 9 [2022-11-18 21:04:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:54,158 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-11-18 21:04:54,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-11-18 21:04:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 21:04:54,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:54,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:54,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 21:04:54,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:54,161 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-11-18 21:04:54,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:54,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059810368] [2022-11-18 21:04:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:54,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:54,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:54,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059810368] [2022-11-18 21:04:54,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059810368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:54,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:54,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:04:54,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234854211] [2022-11-18 21:04:54,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:54,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:04:54,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:54,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:04:54,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:54,344 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:54,496 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2022-11-18 21:04:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:04:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-18 21:04:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:54,497 INFO L225 Difference]: With dead ends: 113 [2022-11-18 21:04:54,498 INFO L226 Difference]: Without dead ends: 113 [2022-11-18 21:04:54,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:04:54,501 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 218 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:54,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 86 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:04:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-18 21:04:54,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2022-11-18 21:04:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 75 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-11-18 21:04:54,524 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 9 [2022-11-18 21:04:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:54,524 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-11-18 21:04:54,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,525 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-11-18 21:04:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 21:04:54,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:54,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:54,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 21:04:54,526 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:54,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-11-18 21:04:54,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:54,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769397775] [2022-11-18 21:04:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:54,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:54,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:54,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769397775] [2022-11-18 21:04:54,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769397775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:54,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:54,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:04:54,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112554458] [2022-11-18 21:04:54,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:54,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:04:54,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:54,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:04:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:04:54,716 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:54,826 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2022-11-18 21:04:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:04:54,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-18 21:04:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:54,828 INFO L225 Difference]: With dead ends: 121 [2022-11-18 21:04:54,828 INFO L226 Difference]: Without dead ends: 121 [2022-11-18 21:04:54,829 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 [2022-11-18 21:04:54,830 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:54,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:04:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-18 21:04:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2022-11-18 21:04:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 75 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-11-18 21:04:54,852 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 9 [2022-11-18 21:04:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:54,852 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-11-18 21:04:54,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-11-18 21:04:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 21:04:54,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:54,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:54,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 21:04:54,859 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-11-18 21:04:54,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:54,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251423804] [2022-11-18 21:04:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:54,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:55,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:55,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251423804] [2022-11-18 21:04:55,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251423804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:55,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:55,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:04:55,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72104767] [2022-11-18 21:04:55,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:55,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:55,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:55,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:55,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:55,003 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:55,095 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2022-11-18 21:04:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:55,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 21:04:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:55,096 INFO L225 Difference]: With dead ends: 109 [2022-11-18 21:04:55,097 INFO L226 Difference]: Without dead ends: 109 [2022-11-18 21:04:55,097 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 [2022-11-18 21:04:55,098 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:55,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:04:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-18 21:04:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2022-11-18 21:04:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.5) internal successors, (96), 78 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-11-18 21:04:55,103 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 10 [2022-11-18 21:04:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:55,103 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-11-18 21:04:55,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-11-18 21:04:55,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 21:04:55,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:55,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:55,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 21:04:55,105 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:55,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2022-11-18 21:04:55,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:55,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056620850] [2022-11-18 21:04:55,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:55,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:55,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:55,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056620850] [2022-11-18 21:04:55,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056620850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:55,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:55,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:04:55,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526177530] [2022-11-18 21:04:55,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:55,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:04:55,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:55,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:04:55,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:55,366 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:55,550 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-11-18 21:04:55,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:04:55,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 21:04:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:55,551 INFO L225 Difference]: With dead ends: 115 [2022-11-18 21:04:55,551 INFO L226 Difference]: Without dead ends: 115 [2022-11-18 21:04:55,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:04:55,552 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 207 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:55,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 86 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:04:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-18 21:04:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2022-11-18 21:04:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.5) internal successors, (96), 78 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:55,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-11-18 21:04:55,556 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 10 [2022-11-18 21:04:55,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:55,556 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-11-18 21:04:55,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:55,556 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-11-18 21:04:55,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 21:04:55,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:55,557 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:55,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 21:04:55,558 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:55,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:55,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-11-18 21:04:55,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:55,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883341326] [2022-11-18 21:04:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:55,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:55,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:55,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883341326] [2022-11-18 21:04:55,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883341326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:55,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210088998] [2022-11-18 21:04:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:55,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:55,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:55,821 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:55,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:04:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:04:55,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:56,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:56,077 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 [2022-11-18 21:04:56,085 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 [2022-11-18 21:04:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:56,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:56,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:04:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:56,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210088998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:56,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:56,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-18 21:04:56,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206196062] [2022-11-18 21:04:56,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 21:04:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 21:04:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:04:56,469 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:56,936 INFO L93 Difference]: Finished difference Result 160 states and 186 transitions. [2022-11-18 21:04:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:04:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 21:04:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:56,938 INFO L225 Difference]: With dead ends: 160 [2022-11-18 21:04:56,938 INFO L226 Difference]: Without dead ends: 160 [2022-11-18 21:04:56,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:04:56,939 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 311 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:56,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 383 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:04:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-18 21:04:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 76. [2022-11-18 21:04:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 75 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-11-18 21:04:56,943 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 11 [2022-11-18 21:04:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:56,943 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-11-18 21:04:56,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-11-18 21:04:56,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:04:56,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:56,945 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:56,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:57,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:57,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2022-11-18 21:04:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:57,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427869214] [2022-11-18 21:04:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:57,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:57,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427869214] [2022-11-18 21:04:57,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427869214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:57,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:57,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:04:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456812806] [2022-11-18 21:04:57,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:57,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:04:57,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:57,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:04:57,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:04:57,252 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 4 states, 3 states have (on average 4.0) 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) [2022-11-18 21:04:57,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:57,303 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2022-11-18 21:04:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:04:57,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) 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 [2022-11-18 21:04:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:57,304 INFO L225 Difference]: With dead ends: 74 [2022-11-18 21:04:57,305 INFO L226 Difference]: Without dead ends: 74 [2022-11-18 21:04:57,305 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 [2022-11-18 21:04:57,306 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 66 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:57,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 53 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:04:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-18 21:04:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-18 21:04:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-11-18 21:04:57,312 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 12 [2022-11-18 21:04:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:57,313 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-11-18 21:04:57,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) 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) [2022-11-18 21:04:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-11-18 21:04:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:04:57,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:57,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:57,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 21:04:57,315 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:57,316 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-11-18 21:04:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:57,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694202496] [2022-11-18 21:04:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:57,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:57,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:57,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694202496] [2022-11-18 21:04:57,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694202496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:04:57,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:04:57,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 21:04:57,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662153188] [2022-11-18 21:04:57,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:04:57,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:04:57,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:57,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:04:57,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:04:57,475 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-18 21:04:57,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:57,590 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-11-18 21:04:57,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:04:57,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2022-11-18 21:04:57,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:57,591 INFO L225 Difference]: With dead ends: 100 [2022-11-18 21:04:57,592 INFO L226 Difference]: Without dead ends: 100 [2022-11-18 21:04:57,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:04:57,592 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 166 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:57,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 82 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:04:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-18 21:04:57,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2022-11-18 21:04:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 76 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2022-11-18 21:04:57,596 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 12 [2022-11-18 21:04:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:57,596 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2022-11-18 21:04:57,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-18 21:04:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2022-11-18 21:04:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:57,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:57,597 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:57,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 21:04:57,597 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:57,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-11-18 21:04:57,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:57,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694674992] [2022-11-18 21:04:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:57,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:57,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:57,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694674992] [2022-11-18 21:04:57,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694674992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:57,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683218533] [2022-11-18 21:04:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:57,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:57,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:57,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:57,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:04:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:57,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 21:04:57,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:58,001 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 21:04:58,002 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 [2022-11-18 21:04:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:58,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:58,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683218533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:58,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:04:58,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-11-18 21:04:58,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339176547] [2022-11-18 21:04:58,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:58,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:04:58,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:04:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:04:58,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:04:58,614 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:59,071 INFO L93 Difference]: Finished difference Result 146 states and 171 transitions. [2022-11-18 21:04:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:04:59,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 21:04:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:59,072 INFO L225 Difference]: With dead ends: 146 [2022-11-18 21:04:59,072 INFO L226 Difference]: Without dead ends: 146 [2022-11-18 21:04:59,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:04:59,073 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 194 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:59,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 283 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:04:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-18 21:04:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 74. [2022-11-18 21:04:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2022-11-18 21:04:59,076 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 13 [2022-11-18 21:04:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:59,077 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2022-11-18 21:04:59,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2022-11-18 21:04:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:59,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:59,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:59,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:59,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 21:04:59,278 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:04:59,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:59,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1389200859, now seen corresponding path program 1 times [2022-11-18 21:04:59,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:04:59,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420638371] [2022-11-18 21:04:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:59,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:04:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:59,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:04:59,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420638371] [2022-11-18 21:04:59,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420638371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:04:59,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942561203] [2022-11-18 21:04:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:59,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:04:59,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:04:59,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:04:59,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:04:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:59,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:04:59,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:59,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:04:59,688 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 [2022-11-18 21:04:59,697 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 [2022-11-18 21:04:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:59,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:00,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:05:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:00,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942561203] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:00,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:05:00,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2022-11-18 21:05:00,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963430753] [2022-11-18 21:05:00,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:00,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:05:00,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:00,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:05:00,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:05:00,097 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:00,246 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-18 21:05:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:05:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 21:05:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:00,247 INFO L225 Difference]: With dead ends: 75 [2022-11-18 21:05:00,247 INFO L226 Difference]: Without dead ends: 75 [2022-11-18 21:05:00,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:05:00,248 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 95 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:00,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 54 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:05:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-18 21:05:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2022-11-18 21:05:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.411764705882353) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-11-18 21:05:00,251 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 13 [2022-11-18 21:05:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:00,251 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-11-18 21:05:00,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-11-18 21:05:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:05:00,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:00,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:00,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:00,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 21:05:00,462 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1912378887, now seen corresponding path program 1 times [2022-11-18 21:05:00,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:00,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300398282] [2022-11-18 21:05:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:00,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:00,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:00,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:00,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300398282] [2022-11-18 21:05:00,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300398282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:00,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:00,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 21:05:00,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665281576] [2022-11-18 21:05:00,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:00,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:05:00,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:05:00,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:05:00,765 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:00,815 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-11-18 21:05:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:05:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-11-18 21:05:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:00,816 INFO L225 Difference]: With dead ends: 60 [2022-11-18 21:05:00,817 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 21:05:00,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:05:00,817 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:00,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 45 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:05:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 21:05:00,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-11-18 21:05:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) 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) [2022-11-18 21:05:00,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-18 21:05:00,820 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 14 [2022-11-18 21:05:00,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:00,820 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-18 21:05:00,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:00,820 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-18 21:05:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 21:05:00,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:00,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:00,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 21:05:00,821 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:00,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:00,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2022-11-18 21:05:00,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:00,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888159225] [2022-11-18 21:05:00,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:00,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:01,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888159225] [2022-11-18 21:05:01,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888159225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:01,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:01,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:01,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103329367] [2022-11-18 21:05:01,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:01,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:05:01,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:01,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:05:01,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:05:01,004 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:01,034 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-11-18 21:05:01,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:05:01,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 21:05:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:01,035 INFO L225 Difference]: With dead ends: 56 [2022-11-18 21:05:01,035 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 21:05:01,035 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 [2022-11-18 21:05:01,036 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:01,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:05:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 21:05:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-18 21:05:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 52 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) [2022-11-18 21:05:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-11-18 21:05:01,041 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-11-18 21:05:01,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:01,042 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-11-18 21:05:01,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-11-18 21:05:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 21:05:01,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:01,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:01,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 21:05:01,043 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2022-11-18 21:05:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:01,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928015191] [2022-11-18 21:05:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:01,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:01,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:01,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928015191] [2022-11-18 21:05:01,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928015191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:01,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:01,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:05:01,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615550160] [2022-11-18 21:05:01,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:01,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:05:01,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:01,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:05:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:05:01,108 INFO L87 Difference]: Start difference. First operand 53 states and 61 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) [2022-11-18 21:05:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:01,154 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-18 21:05:01,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:05:01,155 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 [2022-11-18 21:05:01,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:01,156 INFO L225 Difference]: With dead ends: 50 [2022-11-18 21:05:01,158 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 21:05:01,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:05:01,159 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 68 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:01,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 56 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:05:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 21:05:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-18 21:05:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-11-18 21:05:01,161 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2022-11-18 21:05:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:01,162 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-11-18 21:05:01,162 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) [2022-11-18 21:05:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-11-18 21:05:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 21:05:01,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:01,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:01,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 21:05:01,165 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2022-11-18 21:05:01,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:01,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414177726] [2022-11-18 21:05:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:01,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:01,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:01,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414177726] [2022-11-18 21:05:01,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414177726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:01,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:01,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 21:05:01,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733564550] [2022-11-18 21:05:01,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:01,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:05:01,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:01,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:05:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:05:01,364 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-11-18 21:05:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:01,523 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-11-18 21:05:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:05:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2022-11-18 21:05:01,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:01,524 INFO L225 Difference]: With dead ends: 66 [2022-11-18 21:05:01,524 INFO L226 Difference]: Without dead ends: 66 [2022-11-18 21:05:01,525 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 [2022-11-18 21:05:01,525 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 171 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:01,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 67 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:05:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-18 21:05:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2022-11-18 21:05:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) 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) [2022-11-18 21:05:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-18 21:05:01,527 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2022-11-18 21:05:01,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:01,528 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-18 21:05:01,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-11-18 21:05:01,528 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-18 21:05:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 21:05:01,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:01,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:01,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 21:05:01,529 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2022-11-18 21:05:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:01,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891620927] [2022-11-18 21:05:01,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:01,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:01,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891620927] [2022-11-18 21:05:01,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891620927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:01,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:01,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:05:01,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581877906] [2022-11-18 21:05:01,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:01,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:05:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:05:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:05:01,558 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:01,566 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-11-18 21:05:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:05:01,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-18 21:05:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:01,568 INFO L225 Difference]: With dead ends: 59 [2022-11-18 21:05:01,568 INFO L226 Difference]: Without dead ends: 59 [2022-11-18 21:05:01,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:05:01,569 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:01,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 21:05:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-18 21:05:01,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-18 21:05:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 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) [2022-11-18 21:05:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-11-18 21:05:01,572 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2022-11-18 21:05:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:01,573 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-11-18 21:05:01,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-11-18 21:05:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:05:01,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:01,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:01,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 21:05:01,574 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:01,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2022-11-18 21:05:01,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:01,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443831618] [2022-11-18 21:05:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:01,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:01,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:01,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443831618] [2022-11-18 21:05:01,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443831618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:01,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:01,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 21:05:01,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430533788] [2022-11-18 21:05:01,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:01,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:05:01,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:01,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:05:01,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:05:01,872 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:02,003 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-11-18 21:05:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:05:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-18 21:05:02,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:02,005 INFO L225 Difference]: With dead ends: 71 [2022-11-18 21:05:02,005 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 21:05:02,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:05:02,006 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:02,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 185 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:05:02,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 21:05:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-18 21:05:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-11-18 21:05:02,009 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2022-11-18 21:05:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:02,009 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-11-18 21:05:02,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-11-18 21:05:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:05:02,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:02,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:02,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 21:05:02,011 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:02,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2022-11-18 21:05:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:02,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563662853] [2022-11-18 21:05:02,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:02,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:02,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:02,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563662853] [2022-11-18 21:05:02,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563662853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:02,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:02,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 21:05:02,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10888403] [2022-11-18 21:05:02,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:02,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 21:05:02,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 21:05:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:05:02,345 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:02,459 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-11-18 21:05:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:05:02,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-18 21:05:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:02,461 INFO L225 Difference]: With dead ends: 74 [2022-11-18 21:05:02,461 INFO L226 Difference]: Without dead ends: 62 [2022-11-18 21:05:02,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:05:02,462 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:02,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 166 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:05:02,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-18 21:05:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-11-18 21:05:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-11-18 21:05:02,464 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2022-11-18 21:05:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:02,465 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-11-18 21:05:02,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-11-18 21:05:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:05:02,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:02,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:02,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 21:05:02,466 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:02,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:02,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2022-11-18 21:05:02,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:02,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232454734] [2022-11-18 21:05:02,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:02,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232454734] [2022-11-18 21:05:02,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232454734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:02,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:02,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 21:05:02,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865803471] [2022-11-18 21:05:02,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:02,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 21:05:02,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 21:05:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-18 21:05:02,721 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:02,951 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-11-18 21:05:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:05:02,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 21:05:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:02,954 INFO L225 Difference]: With dead ends: 75 [2022-11-18 21:05:02,954 INFO L226 Difference]: Without dead ends: 75 [2022-11-18 21:05:02,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:05:02,955 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:02,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 217 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:05:02,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-18 21:05:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-11-18 21:05:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 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) [2022-11-18 21:05:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-11-18 21:05:02,959 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2022-11-18 21:05:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:02,960 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-11-18 21:05:02,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-11-18 21:05:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 21:05:02,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:02,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:02,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 21:05:02,962 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:02,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:02,962 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2022-11-18 21:05:02,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:02,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634393960] [2022-11-18 21:05:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:02,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:03,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:03,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634393960] [2022-11-18 21:05:03,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634393960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:05:03,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:05:03,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 21:05:03,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274360582] [2022-11-18 21:05:03,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:05:03,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 21:05:03,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:03,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 21:05:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:05:03,428 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:03,664 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-11-18 21:05:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 21:05:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 21:05:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:03,666 INFO L225 Difference]: With dead ends: 96 [2022-11-18 21:05:03,666 INFO L226 Difference]: Without dead ends: 96 [2022-11-18 21:05:03,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:05:03,667 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:03,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 174 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:05:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-18 21:05:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2022-11-18 21:05:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 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) [2022-11-18 21:05:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-11-18 21:05:03,670 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2022-11-18 21:05:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:03,671 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-11-18 21:05:03,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-11-18 21:05:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 21:05:03,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:03,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:03,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 21:05:03,673 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:03,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:03,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2022-11-18 21:05:03,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:03,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006670504] [2022-11-18 21:05:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:03,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:03,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:03,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006670504] [2022-11-18 21:05:03,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006670504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309767662] [2022-11-18 21:05:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:03,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:03,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:03,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:03,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:05:04,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:04,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:05:04,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:04,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:04,325 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 [2022-11-18 21:05:04,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:04,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309767662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:04,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:04,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-18 21:05:04,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350881737] [2022-11-18 21:05:04,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:04,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 21:05:04,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:04,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 21:05:04,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:05:04,366 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:04,611 INFO L93 Difference]: Finished difference Result 145 states and 163 transitions. [2022-11-18 21:05:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:05:04,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 21:05:04,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:04,612 INFO L225 Difference]: With dead ends: 145 [2022-11-18 21:05:04,613 INFO L226 Difference]: Without dead ends: 145 [2022-11-18 21:05:04,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:05:04,614 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 383 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:04,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 158 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:05:04,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-18 21:05:04,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 102. [2022-11-18 21:05:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 98 states have (on average 1.2142857142857142) internal successors, (119), 101 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) [2022-11-18 21:05:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2022-11-18 21:05:04,617 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 27 [2022-11-18 21:05:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:04,618 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2022-11-18 21:05:04,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2022-11-18 21:05:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 21:05:04,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:04,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:04,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:04,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:04,820 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2022-11-18 21:05:04,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:04,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485508870] [2022-11-18 21:05:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:05,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:05,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485508870] [2022-11-18 21:05:05,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485508870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:05,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453028900] [2022-11-18 21:05:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:05,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:05,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:05,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:05,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:05:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:05:05,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:05,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:05,613 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 [2022-11-18 21:05:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:05,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453028900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:05,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:05,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-11-18 21:05:05,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632764449] [2022-11-18 21:05:05,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:05,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 21:05:05,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:05,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 21:05:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:05:05,650 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 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) [2022-11-18 21:05:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:06,067 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2022-11-18 21:05:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 21:05:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-18 21:05:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:06,068 INFO L225 Difference]: With dead ends: 136 [2022-11-18 21:05:06,068 INFO L226 Difference]: Without dead ends: 136 [2022-11-18 21:05:06,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2022-11-18 21:05:06,070 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 323 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:06,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 273 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:05:06,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-18 21:05:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2022-11-18 21:05:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 97 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) [2022-11-18 21:05:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2022-11-18 21:05:06,074 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 30 [2022-11-18 21:05:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:06,074 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2022-11-18 21:05:06,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 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) [2022-11-18 21:05:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2022-11-18 21:05:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 21:05:06,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:06,078 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:06,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:06,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 21:05:06,285 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:06,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2022-11-18 21:05:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:06,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561365821] [2022-11-18 21:05:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:06,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:06,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561365821] [2022-11-18 21:05:06,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561365821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:06,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496021084] [2022-11-18 21:05:06,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:05:06,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:06,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:06,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:06,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:05:07,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:05:07,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:07,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 21:05:07,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:07,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 21:05:07,460 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 21:05:07,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-18 21:05:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:07,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:07,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-18 21:05:07,676 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 [2022-11-18 21:05:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:07,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496021084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:07,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:07,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-11-18 21:05:07,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952448119] [2022-11-18 21:05:07,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:07,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 21:05:07,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:07,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 21:05:07,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:05:07,871 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:08,956 INFO L93 Difference]: Finished difference Result 173 states and 194 transitions. [2022-11-18 21:05:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 21:05:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 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 36 [2022-11-18 21:05:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:08,957 INFO L225 Difference]: With dead ends: 173 [2022-11-18 21:05:08,957 INFO L226 Difference]: Without dead ends: 173 [2022-11-18 21:05:08,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 21:05:08,964 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 399 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:08,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 406 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 244 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-11-18 21:05:08,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-18 21:05:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 140. [2022-11-18 21:05:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.1666666666666667) internal successors, (161), 139 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 161 transitions. [2022-11-18 21:05:08,970 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 161 transitions. Word has length 36 [2022-11-18 21:05:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:08,970 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 161 transitions. [2022-11-18 21:05:08,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 161 transitions. [2022-11-18 21:05:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 21:05:08,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:08,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:08,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:09,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 21:05:09,179 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:09,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1892678105, now seen corresponding path program 2 times [2022-11-18 21:05:09,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:09,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555083001] [2022-11-18 21:05:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:09,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:09,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:09,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555083001] [2022-11-18 21:05:09,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555083001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:09,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036958846] [2022-11-18 21:05:09,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:05:09,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:09,771 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:09,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:05:09,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:05:09,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:09,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 21:05:09,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:09,920 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 [2022-11-18 21:05:10,083 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 [2022-11-18 21:05:10,135 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 [2022-11-18 21:05:10,365 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 [2022-11-18 21:05:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:10,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:10,464 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_314 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_314) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-11-18 21:05:10,473 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:05:10,474 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 [2022-11-18 21:05:10,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:05:10,483 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 [2022-11-18 21:05:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:10,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036958846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:10,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:10,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2022-11-18 21:05:10,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687120676] [2022-11-18 21:05:10,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:10,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 21:05:10,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 21:05:10,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=352, Unknown=1, NotChecked=38, Total=462 [2022-11-18 21:05:10,662 INFO L87 Difference]: Start difference. First operand 140 states and 161 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 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) [2022-11-18 21:05:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:11,070 INFO L93 Difference]: Finished difference Result 231 states and 260 transitions. [2022-11-18 21:05:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 21:05:11,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 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 38 [2022-11-18 21:05:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:11,072 INFO L225 Difference]: With dead ends: 231 [2022-11-18 21:05:11,072 INFO L226 Difference]: Without dead ends: 185 [2022-11-18 21:05:11,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=671, Unknown=1, NotChecked=54, Total=870 [2022-11-18 21:05:11,074 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:11,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 257 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 137 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-11-18 21:05:11,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-18 21:05:11,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2022-11-18 21:05:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 176 states have (on average 1.1477272727272727) internal successors, (202), 177 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 202 transitions. [2022-11-18 21:05:11,080 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 202 transitions. Word has length 38 [2022-11-18 21:05:11,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:11,080 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 202 transitions. [2022-11-18 21:05:11,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 22 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) [2022-11-18 21:05:11,081 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 202 transitions. [2022-11-18 21:05:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 21:05:11,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:11,082 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:11,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:11,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 21:05:11,283 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:11,283 INFO L85 PathProgramCache]: Analyzing trace with hash -304963965, now seen corresponding path program 3 times [2022-11-18 21:05:11,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:11,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651787022] [2022-11-18 21:05:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:11,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:11,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:11,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651787022] [2022-11-18 21:05:11,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651787022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:11,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126040529] [2022-11-18 21:05:11,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:05:11,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:11,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:11,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:11,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 21:05:11,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 21:05:11,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 21:05:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:11,877 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 21:05:11,878 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 [2022-11-18 21:05:12,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-18 21:05:12,748 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-18 21:05:12,749 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 23 treesize of output 20 [2022-11-18 21:05:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:05:12,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:13,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-18 21:05:13,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-18 21:05:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:05:13,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126040529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:13,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:13,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 34 [2022-11-18 21:05:13,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362928715] [2022-11-18 21:05:13,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:13,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 21:05:13,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:13,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 21:05:13,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 21:05:13,853 INFO L87 Difference]: Start difference. First operand 178 states and 202 transitions. Second operand has 35 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:16,046 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2022-11-18 21:05:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 21:05:16,047 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-18 21:05:16,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:16,049 INFO L225 Difference]: With dead ends: 207 [2022-11-18 21:05:16,049 INFO L226 Difference]: Without dead ends: 171 [2022-11-18 21:05:16,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=534, Invalid=3248, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 21:05:16,060 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 214 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:16,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 435 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 288 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-11-18 21:05:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-18 21:05:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 141. [2022-11-18 21:05:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 139 states have (on average 1.143884892086331) internal successors, (159), 140 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) [2022-11-18 21:05:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 159 transitions. [2022-11-18 21:05:16,067 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 159 transitions. Word has length 40 [2022-11-18 21:05:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:16,067 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 159 transitions. [2022-11-18 21:05:16,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.2941176470588234) internal successors, (112), 35 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:16,068 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 159 transitions. [2022-11-18 21:05:16,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 21:05:16,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:16,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:16,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:16,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 21:05:16,276 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2034497590, now seen corresponding path program 3 times [2022-11-18 21:05:16,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:16,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636365980] [2022-11-18 21:05:16,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:16,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:16,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:16,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636365980] [2022-11-18 21:05:16,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636365980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:16,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874371545] [2022-11-18 21:05:16,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:05:16,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:16,609 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:16,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 21:05:16,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 21:05:16,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:16,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:05:16,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:16,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:17,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-18 21:05:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:17,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874371545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:17,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:17,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-11-18 21:05:17,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752396871] [2022-11-18 21:05:17,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:17,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 21:05:17,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:17,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 21:05:17,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:05:17,296 INFO L87 Difference]: Start difference. First operand 141 states and 159 transitions. Second operand has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:17,601 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2022-11-18 21:05:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:05:17,602 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-18 21:05:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:17,603 INFO L225 Difference]: With dead ends: 238 [2022-11-18 21:05:17,603 INFO L226 Difference]: Without dead ends: 238 [2022-11-18 21:05:17,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2022-11-18 21:05:17,604 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 637 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:17,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 214 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:05:17,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-18 21:05:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 190. [2022-11-18 21:05:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 188 states have (on average 1.1436170212765957) internal successors, (215), 189 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 215 transitions. [2022-11-18 21:05:17,610 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 215 transitions. Word has length 42 [2022-11-18 21:05:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:17,611 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 215 transitions. [2022-11-18 21:05:17,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 215 transitions. [2022-11-18 21:05:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-18 21:05:17,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:17,612 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:17,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:17,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:17,818 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:17,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1388988596, now seen corresponding path program 4 times [2022-11-18 21:05:17,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:17,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487464166] [2022-11-18 21:05:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:17,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:18,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487464166] [2022-11-18 21:05:18,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487464166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:18,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678560049] [2022-11-18 21:05:18,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:05:18,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:18,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:18,918 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:18,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 21:05:19,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:05:19,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 21:05:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:19,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 21:05:19,223 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-18 21:05:19,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-11-18 21:05:20,514 INFO L321 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2022-11-18 21:05:20,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2022-11-18 21:05:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:05:20,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:24,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 136 [2022-11-18 21:05:24,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-18 21:05:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:05:24,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678560049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:24,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:24,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 14] total 41 [2022-11-18 21:05:24,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092300311] [2022-11-18 21:05:24,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:24,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 21:05:24,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 21:05:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1467, Unknown=1, NotChecked=0, Total=1640 [2022-11-18 21:05:24,172 INFO L87 Difference]: Start difference. First operand 190 states and 215 transitions. Second operand has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:26,054 INFO L93 Difference]: Finished difference Result 354 states and 389 transitions. [2022-11-18 21:05:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 21:05:26,055 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-18 21:05:26,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:26,057 INFO L225 Difference]: With dead ends: 354 [2022-11-18 21:05:26,057 INFO L226 Difference]: Without dead ends: 257 [2022-11-18 21:05:26,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=433, Invalid=3472, Unknown=1, NotChecked=0, Total=3906 [2022-11-18 21:05:26,059 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 99 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:26,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 479 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 245 Invalid, 0 Unknown, 38 Unchecked, 0.3s Time] [2022-11-18 21:05:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-18 21:05:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 244. [2022-11-18 21:05:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 243 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 275 transitions. [2022-11-18 21:05:26,066 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 275 transitions. Word has length 53 [2022-11-18 21:05:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:26,066 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 275 transitions. [2022-11-18 21:05:26,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 275 transitions. [2022-11-18 21:05:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 21:05:26,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:26,068 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:26,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:26,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:26,275 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:26,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 942250406, now seen corresponding path program 1 times [2022-11-18 21:05:26,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:26,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770932272] [2022-11-18 21:05:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:26,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 21:05:26,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:26,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770932272] [2022-11-18 21:05:26,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770932272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:26,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887779516] [2022-11-18 21:05:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:26,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:26,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:26,565 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:26,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 21:05:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:26,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 21:05:26,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:05:27,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:27,393 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 [2022-11-18 21:05:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:05:27,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887779516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:27,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:27,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-18 21:05:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590167156] [2022-11-18 21:05:27,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:27,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 21:05:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 21:05:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-11-18 21:05:27,460 INFO L87 Difference]: Start difference. First operand 244 states and 275 transitions. Second operand has 25 states, 25 states have (on average 4.52) internal successors, (113), 25 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) [2022-11-18 21:05:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:29,204 INFO L93 Difference]: Finished difference Result 394 states and 431 transitions. [2022-11-18 21:05:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 21:05:29,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.52) internal successors, (113), 25 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) Word has length 55 [2022-11-18 21:05:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:29,206 INFO L225 Difference]: With dead ends: 394 [2022-11-18 21:05:29,206 INFO L226 Difference]: Without dead ends: 328 [2022-11-18 21:05:29,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=561, Invalid=2195, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 21:05:29,208 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 441 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:29,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 445 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 21:05:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-18 21:05:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 172. [2022-11-18 21:05:29,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 171 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 197 transitions. [2022-11-18 21:05:29,213 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 197 transitions. Word has length 55 [2022-11-18 21:05:29,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:29,214 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 197 transitions. [2022-11-18 21:05:29,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.52) internal successors, (113), 25 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) [2022-11-18 21:05:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 197 transitions. [2022-11-18 21:05:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 21:05:29,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:29,215 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:29,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 21:05:29,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-18 21:05:29,421 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash 517217176, now seen corresponding path program 1 times [2022-11-18 21:05:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:29,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378700856] [2022-11-18 21:05:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:29,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 21:05:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:29,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378700856] [2022-11-18 21:05:29,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378700856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:29,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77801110] [2022-11-18 21:05:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:29,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:29,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:29,680 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:29,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 21:05:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 21:05:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:29,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:05:30,178 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 16 treesize of output 8 [2022-11-18 21:05:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 21:05:30,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 21:05:30,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77801110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:30,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:30,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 20 [2022-11-18 21:05:30,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341747433] [2022-11-18 21:05:30,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:30,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 21:05:30,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:30,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 21:05:30,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:05:30,343 INFO L87 Difference]: Start difference. First operand 172 states and 197 transitions. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:30,862 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2022-11-18 21:05:30,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 21:05:30,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-18 21:05:30,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:30,864 INFO L225 Difference]: With dead ends: 188 [2022-11-18 21:05:30,865 INFO L226 Difference]: Without dead ends: 188 [2022-11-18 21:05:30,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:05:30,866 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:30,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 270 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:05:30,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-18 21:05:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2022-11-18 21:05:30,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 154 states have (on average 1.1428571428571428) internal successors, (176), 155 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 176 transitions. [2022-11-18 21:05:30,872 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 176 transitions. Word has length 59 [2022-11-18 21:05:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:30,873 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 176 transitions. [2022-11-18 21:05:30,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 176 transitions. [2022-11-18 21:05:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 21:05:30,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:30,874 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:30,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 21:05:31,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:31,081 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:31,082 INFO L85 PathProgramCache]: Analyzing trace with hash 276863736, now seen corresponding path program 1 times [2022-11-18 21:05:31,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:31,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744608458] [2022-11-18 21:05:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:31,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:33,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744608458] [2022-11-18 21:05:33,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744608458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532850247] [2022-11-18 21:05:33,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:33,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:33,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:33,295 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:33,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 21:05:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 21:05:33,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:33,470 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 [2022-11-18 21:05:33,890 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 [2022-11-18 21:05:33,981 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 [2022-11-18 21:05:34,345 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 [2022-11-18 21:05:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:34,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:34,553 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_504 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_504) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-18 21:05:34,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:05:34,564 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 [2022-11-18 21:05:34,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:05:34,576 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 [2022-11-18 21:05:34,588 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 [2022-11-18 21:05:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:35,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532850247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:35,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:35,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 13] total 39 [2022-11-18 21:05:35,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720907989] [2022-11-18 21:05:35,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:35,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 21:05:35,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 21:05:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1303, Unknown=1, NotChecked=72, Total=1482 [2022-11-18 21:05:35,016 INFO L87 Difference]: Start difference. First operand 156 states and 176 transitions. Second operand has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:37,463 INFO L93 Difference]: Finished difference Result 265 states and 295 transitions. [2022-11-18 21:05:37,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 21:05:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-18 21:05:37,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:37,465 INFO L225 Difference]: With dead ends: 265 [2022-11-18 21:05:37,465 INFO L226 Difference]: Without dead ends: 220 [2022-11-18 21:05:37,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=251, Invalid=2402, Unknown=3, NotChecked=100, Total=2756 [2022-11-18 21:05:37,467 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 166 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:37,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 649 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 712 Invalid, 0 Unknown, 102 Unchecked, 0.7s Time] [2022-11-18 21:05:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-18 21:05:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 213. [2022-11-18 21:05:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 211 states have (on average 1.127962085308057) internal successors, (238), 212 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 238 transitions. [2022-11-18 21:05:37,474 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 238 transitions. Word has length 63 [2022-11-18 21:05:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:37,474 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 238 transitions. [2022-11-18 21:05:37,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:37,475 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 238 transitions. [2022-11-18 21:05:37,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 21:05:37,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:37,476 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:37,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:37,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:37,687 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash -525028771, now seen corresponding path program 1 times [2022-11-18 21:05:37,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:37,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103175119] [2022-11-18 21:05:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:37,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:05:39,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103175119] [2022-11-18 21:05:39,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103175119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:39,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144934320] [2022-11-18 21:05:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:39,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:39,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:39,289 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:39,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 21:05:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:39,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 21:05:39,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:39,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 21:05:40,495 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 [2022-11-18 21:05:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:05:40,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:40,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-18 21:05:41,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 21:05:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:05:41,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144934320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:41,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:41,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 40 [2022-11-18 21:05:41,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990386029] [2022-11-18 21:05:41,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:41,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 21:05:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 21:05:41,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1413, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 21:05:41,524 INFO L87 Difference]: Start difference. First operand 213 states and 238 transitions. Second operand has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:46,153 INFO L93 Difference]: Finished difference Result 450 states and 497 transitions. [2022-11-18 21:05:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 21:05:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-18 21:05:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:46,158 INFO L225 Difference]: With dead ends: 450 [2022-11-18 21:05:46,158 INFO L226 Difference]: Without dead ends: 394 [2022-11-18 21:05:46,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=748, Invalid=4802, Unknown=0, NotChecked=0, Total=5550 [2022-11-18 21:05:46,160 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 671 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:46,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1148 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1058 Invalid, 0 Unknown, 310 Unchecked, 1.0s Time] [2022-11-18 21:05:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-18 21:05:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 291. [2022-11-18 21:05:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 289 states have (on average 1.1314878892733564) internal successors, (327), 290 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:46,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 327 transitions. [2022-11-18 21:05:46,174 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 327 transitions. Word has length 63 [2022-11-18 21:05:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:46,175 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 327 transitions. [2022-11-18 21:05:46,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 327 transitions. [2022-11-18 21:05:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 21:05:46,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:46,176 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:46,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:46,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 21:05:46,383 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:46,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:46,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1057469728, now seen corresponding path program 2 times [2022-11-18 21:05:46,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:46,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086576411] [2022-11-18 21:05:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:46,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:05:46,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:46,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086576411] [2022-11-18 21:05:46,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086576411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:46,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738323894] [2022-11-18 21:05:46,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:05:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:46,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:46,939 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:46,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 21:05:47,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:05:47,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:47,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 21:05:47,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:05:47,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:47,878 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 [2022-11-18 21:05:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 21:05:47,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738323894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:47,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:47,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-11-18 21:05:47,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336489622] [2022-11-18 21:05:47,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:47,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 21:05:47,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:47,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 21:05:47,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:05:47,979 INFO L87 Difference]: Start difference. First operand 291 states and 327 transitions. Second operand has 29 states, 28 states have (on average 5.142857142857143) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:48,990 INFO L93 Difference]: Finished difference Result 520 states and 588 transitions. [2022-11-18 21:05:48,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 21:05:48,990 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.142857142857143) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 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 [2022-11-18 21:05:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:48,993 INFO L225 Difference]: With dead ends: 520 [2022-11-18 21:05:48,993 INFO L226 Difference]: Without dead ends: 520 [2022-11-18 21:05:48,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=318, Invalid=1242, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 21:05:48,995 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 604 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:48,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 600 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 21:05:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-18 21:05:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 368. [2022-11-18 21:05:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 366 states have (on average 1.150273224043716) internal successors, (421), 367 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 421 transitions. [2022-11-18 21:05:49,009 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 421 transitions. Word has length 67 [2022-11-18 21:05:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:49,009 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 421 transitions. [2022-11-18 21:05:49,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.142857142857143) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 421 transitions. [2022-11-18 21:05:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 21:05:49,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:49,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:49,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:49,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 21:05:49,218 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:49,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1668022213, now seen corresponding path program 2 times [2022-11-18 21:05:49,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:49,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223717751] [2022-11-18 21:05:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:49,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:49,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223717751] [2022-11-18 21:05:49,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223717751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257750591] [2022-11-18 21:05:49,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:05:49,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:49,679 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:49,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 21:05:49,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:05:49,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:49,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 21:05:49,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:50,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:50,668 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 [2022-11-18 21:05:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:05:50,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257750591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:50,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:50,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-11-18 21:05:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596281427] [2022-11-18 21:05:50,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:50,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 21:05:50,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 21:05:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:05:50,775 INFO L87 Difference]: Start difference. First operand 368 states and 421 transitions. Second operand has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 24 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:51,367 INFO L93 Difference]: Finished difference Result 566 states and 651 transitions. [2022-11-18 21:05:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 21:05:51,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 24 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-18 21:05:51,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:51,371 INFO L225 Difference]: With dead ends: 566 [2022-11-18 21:05:51,372 INFO L226 Difference]: Without dead ends: 566 [2022-11-18 21:05:51,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2022-11-18 21:05:51,373 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 480 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:51,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 431 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 21:05:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-18 21:05:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 467. [2022-11-18 21:05:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 465 states have (on average 1.156989247311828) internal successors, (538), 466 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:51,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 538 transitions. [2022-11-18 21:05:51,407 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 538 transitions. Word has length 67 [2022-11-18 21:05:51,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:51,408 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 538 transitions. [2022-11-18 21:05:51,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.3478260869565215) internal successors, (146), 24 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:51,408 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 538 transitions. [2022-11-18 21:05:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 21:05:51,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:51,410 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:51,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:51,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-18 21:05:51,616 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1326947479, now seen corresponding path program 2 times [2022-11-18 21:05:51,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:51,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453509283] [2022-11-18 21:05:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:51,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:52,684 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:05:52,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:52,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453509283] [2022-11-18 21:05:52,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453509283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:52,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635527538] [2022-11-18 21:05:52,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:05:52,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:52,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:52,686 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:52,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 21:05:52,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:05:52,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:52,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 21:05:52,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:53,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 21:05:53,876 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 [2022-11-18 21:05:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:05:53,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:54,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-18 21:05:54,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 21:05:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:05:54,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635527538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:54,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:54,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 38 [2022-11-18 21:05:54,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909089356] [2022-11-18 21:05:54,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:54,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 21:05:54,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 21:05:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 21:05:54,875 INFO L87 Difference]: Start difference. First operand 467 states and 538 transitions. Second operand has 38 states, 38 states have (on average 3.973684210526316) internal successors, (151), 38 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:05:57,613 INFO L93 Difference]: Finished difference Result 584 states and 652 transitions. [2022-11-18 21:05:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 21:05:57,614 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.973684210526316) internal successors, (151), 38 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-18 21:05:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:05:57,617 INFO L225 Difference]: With dead ends: 584 [2022-11-18 21:05:57,617 INFO L226 Difference]: Without dead ends: 584 [2022-11-18 21:05:57,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=625, Invalid=3797, Unknown=0, NotChecked=0, Total=4422 [2022-11-18 21:05:57,619 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 754 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:05:57,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 999 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 877 Invalid, 0 Unknown, 192 Unchecked, 0.7s Time] [2022-11-18 21:05:57,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-18 21:05:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 385. [2022-11-18 21:05:57,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.1409921671018277) internal successors, (437), 384 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 437 transitions. [2022-11-18 21:05:57,634 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 437 transitions. Word has length 71 [2022-11-18 21:05:57,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:05:57,634 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 437 transitions. [2022-11-18 21:05:57,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.973684210526316) internal successors, (151), 38 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:05:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 437 transitions. [2022-11-18 21:05:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-18 21:05:57,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:05:57,636 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:57,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-18 21:05:57,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 21:05:57,849 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-11-18 21:05:57,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:57,850 INFO L85 PathProgramCache]: Analyzing trace with hash 553451124, now seen corresponding path program 3 times [2022-11-18 21:05:57,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:57,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966939759] [2022-11-18 21:05:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:57,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:06:00,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:06:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966939759] [2022-11-18 21:06:00,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966939759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:06:00,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683381134] [2022-11-18 21:06:00,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:06:00,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:06:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:06:00,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:06:00,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f44a13e-11da-40ae-a81c-af1e312dbbd5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 21:06:00,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 21:06:00,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:00,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-18 21:06:00,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:00,661 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-18 21:06:00,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-18 21:06:00,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 21:06:01,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:01,170 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 30 treesize of output 25 [2022-11-18 21:06:01,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 21:06:01,664 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 21:06:01,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-11-18 21:06:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:02,093 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 21:06:02,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 40 [2022-11-18 21:06:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:02,405 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 21:06:02,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 40 [2022-11-18 21:06:02,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:02,689 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 21:06:02,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2022-11-18 21:06:02,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:06:02,859 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 21:06:02,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2022-11-18 21:06:04,384 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-18 21:06:04,385 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 68 treesize of output 36 [2022-11-18 21:06:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 21:06:04,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:29,774 INFO L321 Elim1Store]: treesize reduction 611, result has 27.9 percent of original size [2022-11-18 21:08:29,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 657168697 treesize of output 191404581 [2022-11-18 21:19:12,149 WARN L233 SmtUtils]: Spent 10.71m on a formula simplification that was a NOOP. DAG size: 7595 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)