./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a --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 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- 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-b5237d8 [2022-11-21 16:08:02,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:08:02,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:08:02,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:08:02,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:08:02,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:08:02,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:08:02,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:08:02,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:08:02,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:08:02,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:08:02,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:08:02,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:08:02,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:08:02,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:08:02,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:08:02,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:08:02,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:08:02,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:08:02,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:08:02,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:08:02,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:08:02,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:08:02,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:08:02,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:08:02,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:08:02,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:08:02,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:08:02,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:08:02,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:08:02,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:08:02,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:08:02,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:08:02,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:08:02,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:08:02,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:08:02,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:08:02,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:08:02,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:08:02,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:08:02,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:08:02,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 16:08:02,310 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:08:02,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:08:02,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:08:02,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:08:02,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:08:02,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:08:02,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:08:02,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:08:02,315 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:08:02,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:08:02,317 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:08:02,317 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:08:02,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:08:02,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:08:02,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:08:02,318 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:08:02,319 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:08:02,319 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:08:02,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:08:02,319 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:08:02,320 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:08:02,320 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:08:02,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:08:02,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:08:02,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:08:02,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:08:02,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:08:02,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:08:02,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:08:02,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:08:02,323 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_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2022-11-21 16:08:02,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:08:02,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:08:02,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:08:02,719 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:08:02,719 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:08:02,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-11-21 16:08:05,947 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:08:06,278 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:08:06,279 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2022-11-21 16:08:06,296 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/data/d4c6e59f6/c26c3962d04d43da9b7478e057b3e2ac/FLAG34acef9c9 [2022-11-21 16:08:06,317 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/data/d4c6e59f6/c26c3962d04d43da9b7478e057b3e2ac [2022-11-21 16:08:06,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:08:06,323 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:08:06,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:08:06,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:08:06,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:08:06,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e0fbea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06, skipping insertion in model container [2022-11-21 16:08:06,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:08:06,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:08:06,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:08:06,734 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:08:06,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:08:06,858 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:08:06,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06 WrapperNode [2022-11-21 16:08:06,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:08:06,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:08:06,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:08:06,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:08:06,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,937 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-11-21 16:08:06,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:08:06,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:08:06,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:08:06,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:08:06,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:06,994 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:07,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:07,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:08:07,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:08:07,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:08:07,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:08:07,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (1/1) ... [2022-11-21 16:08:07,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:08:07,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:07,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:08:07,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:08:07,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:08:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:08:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:08:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:08:07,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:08:07,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:08:07,290 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:08:07,293 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:08:07,707 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:08:07,716 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:08:07,716 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 16:08:07,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:08:07 BoogieIcfgContainer [2022-11-21 16:08:07,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:08:07,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:08:07,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:08:07,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:08:07,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:08:06" (1/3) ... [2022-11-21 16:08:07,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75af8da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:08:07, skipping insertion in model container [2022-11-21 16:08:07,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:08:06" (2/3) ... [2022-11-21 16:08:07,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75af8da9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:08:07, skipping insertion in model container [2022-11-21 16:08:07,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:08:07" (3/3) ... [2022-11-21 16:08:07,731 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2022-11-21 16:08:07,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:08:07,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-11-21 16:08:07,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:08:07,827 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;@6f695527, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:08:07,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-21 16:08:07,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 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) [2022-11-21 16:08:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-21 16:08:07,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:07,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:07,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031113, now seen corresponding path program 1 times [2022-11-21 16:08:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029857205] [2022-11-21 16:08:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:08,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:08,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029857205] [2022-11-21 16:08:08,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029857205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:08,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:08,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:08:08,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188293827] [2022-11-21 16:08:08,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:08,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:08:08,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:08:08,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:08:08,112 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.96875) internal successors, (63), 49 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) 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) [2022-11-21 16:08:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:08,213 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-11-21 16:08:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:08:08,218 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 [2022-11-21 16:08:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:08,228 INFO L225 Difference]: With dead ends: 51 [2022-11-21 16:08:08,228 INFO L226 Difference]: Without dead ends: 48 [2022-11-21 16:08:08,230 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 [2022-11-21 16:08:08,234 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:08,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:08,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-21 16:08:08,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-21 16:08:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-21 16:08:08,320 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 7 [2022-11-21 16:08:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:08,320 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-21 16:08:08,321 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) [2022-11-21 16:08:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-21 16:08:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:08:08,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:08,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:08,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:08:08,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:08,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-11-21 16:08:08,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:08,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082952583] [2022-11-21 16:08:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:08,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:08,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:08,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082952583] [2022-11-21 16:08:08,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082952583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:08,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:08,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:08:08,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424592855] [2022-11-21 16:08:08,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:08,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:08:08,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:08,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:08:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:08:08,539 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:08,678 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2022-11-21 16:08:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:08:08,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-21 16:08:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:08,682 INFO L225 Difference]: With dead ends: 51 [2022-11-21 16:08:08,684 INFO L226 Difference]: Without dead ends: 48 [2022-11-21 16:08:08,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:08:08,687 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:08,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 185 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-21 16:08:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-21 16:08:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:08,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-21 16:08:08,706 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2022-11-21 16:08:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:08,706 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-21 16:08:08,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-21 16:08:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:08:08,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:08,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:08,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:08:08,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:08,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:08,714 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-11-21 16:08:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181478863] [2022-11-21 16:08:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:08,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:08,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:08,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181478863] [2022-11-21 16:08:08,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181478863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:08,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:08,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:08:08,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694475275] [2022-11-21 16:08:08,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:08,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:08:08,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:08:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:08:08,925 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:08,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:08,978 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-11-21 16:08:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:08:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-21 16:08:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:08,980 INFO L225 Difference]: With dead ends: 46 [2022-11-21 16:08:08,980 INFO L226 Difference]: Without dead ends: 46 [2022-11-21 16:08:08,980 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 [2022-11-21 16:08:08,982 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 42 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 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 [2022-11-21 16:08:08,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-21 16:08:08,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-21 16:08:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-21 16:08:08,990 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 8 [2022-11-21 16:08:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:08,990 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-21 16:08:08,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:08,991 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-21 16:08:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 16:08:08,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:08,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:08,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:08:08,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2022-11-21 16:08:08,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:08,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585894450] [2022-11-21 16:08:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:08,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:09,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:09,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585894450] [2022-11-21 16:08:09,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585894450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:09,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:09,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:08:09,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264709151] [2022-11-21 16:08:09,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:09,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:08:09,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:09,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:08:09,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:08:09,425 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:09,641 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-11-21 16:08:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:08:09,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-21 16:08:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:09,644 INFO L225 Difference]: With dead ends: 50 [2022-11-21 16:08:09,644 INFO L226 Difference]: Without dead ends: 50 [2022-11-21 16:08:09,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:08:09,658 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 106 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:09,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 98 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-21 16:08:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-11-21 16:08:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-11-21 16:08:09,675 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2022-11-21 16:08:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:09,676 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-11-21 16:08:09,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-11-21 16:08:09,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 16:08:09,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:09,679 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:09,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:08:09,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2022-11-21 16:08:09,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:09,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547298969] [2022-11-21 16:08:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:10,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:10,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547298969] [2022-11-21 16:08:10,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547298969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:10,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596298230] [2022-11-21 16:08:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:10,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:10,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:10,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:10,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:08:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:10,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:08:10,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:08:10,466 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 [2022-11-21 16:08:10,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:08:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:10,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:11,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:08:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:11,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596298230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:11,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:11,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-11-21 16:08:11,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609464151] [2022-11-21 16:08:11,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:11,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 16:08:11,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:11,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 16:08:11,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:08:11,125 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:11,547 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-11-21 16:08:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:08:11,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-11-21 16:08:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:11,549 INFO L225 Difference]: With dead ends: 85 [2022-11-21 16:08:11,549 INFO L226 Difference]: Without dead ends: 85 [2022-11-21 16:08:11,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:08:11,551 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 138 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:11,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 251 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:08:11,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-21 16:08:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 46. [2022-11-21 16:08:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.65625) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-21 16:08:11,558 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2022-11-21 16:08:11,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:11,559 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-21 16:08:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-21 16:08:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:08:11,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:11,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:11,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:11,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:11,769 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash 840060780, now seen corresponding path program 1 times [2022-11-21 16:08:11,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:11,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837557094] [2022-11-21 16:08:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:11,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:12,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:12,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837557094] [2022-11-21 16:08:12,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837557094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:12,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123810902] [2022-11-21 16:08:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:12,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:12,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:12,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:08:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:08:12,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:12,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:08:12,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123810902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:12,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:08:12,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2022-11-21 16:08:12,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092268093] [2022-11-21 16:08:12,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:12,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:08:12,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:12,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:08:12,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:08:12,333 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 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) [2022-11-21 16:08:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:12,487 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-11-21 16:08:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:08:12,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 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 [2022-11-21 16:08:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:12,490 INFO L225 Difference]: With dead ends: 45 [2022-11-21 16:08:12,490 INFO L226 Difference]: Without dead ends: 45 [2022-11-21 16:08:12,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:08:12,491 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 165 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:12,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 63 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-21 16:08:12,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-21 16:08:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.625) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-21 16:08:12,502 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2022-11-21 16:08:12,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:12,503 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-21 16:08:12,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 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) [2022-11-21 16:08:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-21 16:08:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:08:12,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:12,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:12,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:12,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-21 16:08:12,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash 840060832, now seen corresponding path program 1 times [2022-11-21 16:08:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:12,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801878507] [2022-11-21 16:08:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:12,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:12,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801878507] [2022-11-21 16:08:12,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801878507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:12,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:12,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:08:12,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652268626] [2022-11-21 16:08:12,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:12,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:08:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:12,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:08:12,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:08:12,768 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-21 16:08:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:12,792 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2022-11-21 16:08:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:08:12,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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 [2022-11-21 16:08:12,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:12,797 INFO L225 Difference]: With dead ends: 81 [2022-11-21 16:08:12,797 INFO L226 Difference]: Without dead ends: 81 [2022-11-21 16:08:12,797 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 [2022-11-21 16:08:12,799 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 64 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 97 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 [2022-11-21 16:08:12,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 97 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-21 16:08:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-11-21 16:08:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 53 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) [2022-11-21 16:08:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-11-21 16:08:12,819 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2022-11-21 16:08:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:12,820 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-11-21 16:08:12,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-21 16:08:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-11-21 16:08:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:08:12,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:12,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:12,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:08:12,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:12,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125410, now seen corresponding path program 1 times [2022-11-21 16:08:12,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:12,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043957612] [2022-11-21 16:08:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:12,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:12,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043957612] [2022-11-21 16:08:12,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043957612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:12,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:12,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:08:12,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620809187] [2022-11-21 16:08:12,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:12,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:08:12,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:12,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:08:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:08:12,892 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 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) [2022-11-21 16:08:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:12,923 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-11-21 16:08:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:08:12,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 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 [2022-11-21 16:08:12,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:12,925 INFO L225 Difference]: With dead ends: 52 [2022-11-21 16:08:12,925 INFO L226 Difference]: Without dead ends: 52 [2022-11-21 16:08:12,925 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 [2022-11-21 16:08:12,927 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:12,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-21 16:08:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-21 16:08:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 51 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) [2022-11-21 16:08:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-11-21 16:08:12,943 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 14 [2022-11-21 16:08:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:12,943 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-11-21 16:08:12,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 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) [2022-11-21 16:08:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-11-21 16:08:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-21 16:08:12,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:12,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:12,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:08:12,946 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:12,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:12,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2022-11-21 16:08:12,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:12,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008444987] [2022-11-21 16:08:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:12,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:13,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:13,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008444987] [2022-11-21 16:08:13,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008444987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562915994] [2022-11-21 16:08:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:13,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:13,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:13,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:13,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:08:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:08:13,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:13,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:13,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562915994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:13,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:13,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-21 16:08:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358646280] [2022-11-21 16:08:13,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:13,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:08:13,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:08:13,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:08:13,367 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:13,614 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2022-11-21 16:08:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:08:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-11-21 16:08:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:13,617 INFO L225 Difference]: With dead ends: 122 [2022-11-21 16:08:13,618 INFO L226 Difference]: Without dead ends: 122 [2022-11-21 16:08:13,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:08:13,621 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 390 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:13,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 239 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-21 16:08:13,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 56. [2022-11-21 16:08:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:13,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-21 16:08:13,634 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 14 [2022-11-21 16:08:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:13,634 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-21 16:08:13,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:13,635 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-21 16:08:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 16:08:13,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:13,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:13,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:13,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:13,843 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash 272080408, now seen corresponding path program 1 times [2022-11-21 16:08:13,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:13,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602279453] [2022-11-21 16:08:13,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:13,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:13,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:13,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602279453] [2022-11-21 16:08:13,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602279453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:13,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:13,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:08:13,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567360629] [2022-11-21 16:08:13,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:13,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:08:13,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:08:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:08:13,989 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:14,031 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-11-21 16:08:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:08:14,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-21 16:08:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:14,032 INFO L225 Difference]: With dead ends: 83 [2022-11-21 16:08:14,033 INFO L226 Difference]: Without dead ends: 83 [2022-11-21 16:08:14,033 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 [2022-11-21 16:08:14,034 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 64 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:14,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 78 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-21 16:08:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2022-11-21 16:08:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-21 16:08:14,046 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 15 [2022-11-21 16:08:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:14,047 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-21 16:08:14,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-21 16:08:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 16:08:14,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:14,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:14,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:08:14,052 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:14,053 INFO L85 PathProgramCache]: Analyzing trace with hash 530245846, now seen corresponding path program 1 times [2022-11-21 16:08:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:14,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491163225] [2022-11-21 16:08:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:14,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:14,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:14,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491163225] [2022-11-21 16:08:14,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491163225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:14,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793916059] [2022-11-21 16:08:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:14,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:14,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:14,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:14,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:08:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:14,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:08:14,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:14,591 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:08:14,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-21 16:08:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:14,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:08:14,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793916059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:14,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:08:14,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-21 16:08:14,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725443272] [2022-11-21 16:08:14,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:14,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:08:14,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:14,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:08:14,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:08:14,760 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:14,802 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-11-21 16:08:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:08:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-11-21 16:08:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:14,803 INFO L225 Difference]: With dead ends: 59 [2022-11-21 16:08:14,804 INFO L226 Difference]: Without dead ends: 59 [2022-11-21 16:08:14,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:08:14,805 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:14,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-21 16:08:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-11-21 16:08:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-11-21 16:08:14,808 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 15 [2022-11-21 16:08:14,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:14,809 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-11-21 16:08:14,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-11-21 16:08:14,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:08:14,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:14,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:14,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:15,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:08:15,017 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:15,017 INFO L85 PathProgramCache]: Analyzing trace with hash 944154227, now seen corresponding path program 1 times [2022-11-21 16:08:15,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:15,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514528182] [2022-11-21 16:08:15,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:15,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:15,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:15,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514528182] [2022-11-21 16:08:15,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514528182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:15,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:15,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:08:15,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881922698] [2022-11-21 16:08:15,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:15,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:08:15,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:08:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:08:15,135 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:15,211 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-11-21 16:08:15,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:08:15,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-21 16:08:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:15,214 INFO L225 Difference]: With dead ends: 54 [2022-11-21 16:08:15,214 INFO L226 Difference]: Without dead ends: 54 [2022-11-21 16:08:15,215 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 [2022-11-21 16:08:15,215 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:15,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 63 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-21 16:08:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-11-21 16:08:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 51 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) [2022-11-21 16:08:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2022-11-21 16:08:15,221 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 18 [2022-11-21 16:08:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:15,223 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2022-11-21 16:08:15,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2022-11-21 16:08:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:08:15,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:15,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:15,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:08:15,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:15,230 INFO L85 PathProgramCache]: Analyzing trace with hash 944154228, now seen corresponding path program 1 times [2022-11-21 16:08:15,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:15,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669282222] [2022-11-21 16:08:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:15,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:15,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669282222] [2022-11-21 16:08:15,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669282222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:15,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361962593] [2022-11-21 16:08:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:15,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:15,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:15,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:15,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:08:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:15,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 16:08:15,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:15,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:15,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-21 16:08:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:15,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361962593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:15,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:15,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-11-21 16:08:15,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015697417] [2022-11-21 16:08:15,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:15,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:08:15,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:08:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:08:15,773 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:16,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:16,033 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2022-11-21 16:08:16,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:08:16,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-21 16:08:16,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:16,035 INFO L225 Difference]: With dead ends: 78 [2022-11-21 16:08:16,035 INFO L226 Difference]: Without dead ends: 78 [2022-11-21 16:08:16,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:08:16,036 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:16,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 133 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-21 16:08:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2022-11-21 16:08:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.38) internal successors, (69), 56 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) [2022-11-21 16:08:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-11-21 16:08:16,039 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 18 [2022-11-21 16:08:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:16,040 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-11-21 16:08:16,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-11-21 16:08:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-21 16:08:16,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:16,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:16,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:16,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:16,248 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:16,249 INFO L85 PathProgramCache]: Analyzing trace with hash -907528666, now seen corresponding path program 2 times [2022-11-21 16:08:16,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:16,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143292303] [2022-11-21 16:08:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:16,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:16,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:16,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143292303] [2022-11-21 16:08:16,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143292303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:16,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772746127] [2022-11-21 16:08:16,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:08:16,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:16,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:16,644 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:16,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:08:16,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:08:16,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:16,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:08:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:16,790 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:08:16,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-21 16:08:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:08:16,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:08:16,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772746127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:16,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:08:16,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2022-11-21 16:08:16,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698208173] [2022-11-21 16:08:16,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:16,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:08:16,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:16,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:08:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:08:16,983 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2022-11-21 16:08:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:17,062 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-21 16:08:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:08:17,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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 18 [2022-11-21 16:08:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:17,063 INFO L225 Difference]: With dead ends: 56 [2022-11-21 16:08:17,063 INFO L226 Difference]: Without dead ends: 56 [2022-11-21 16:08:17,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-21 16:08:17,064 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:17,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 58 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-21 16:08:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-21 16:08:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.36) internal successors, (68), 55 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) [2022-11-21 16:08:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-11-21 16:08:17,066 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 18 [2022-11-21 16:08:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:17,067 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-11-21 16:08:17,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 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) [2022-11-21 16:08:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-11-21 16:08:17,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 16:08:17,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:17,068 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] [2022-11-21 16:08:17,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:17,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:08:17,268 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:17,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:17,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1095465713, now seen corresponding path program 1 times [2022-11-21 16:08:17,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:17,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848969828] [2022-11-21 16:08:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:17,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:17,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:17,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848969828] [2022-11-21 16:08:17,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848969828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:17,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:17,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:08:17,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578069439] [2022-11-21 16:08:17,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:17,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:08:17,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:17,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:08:17,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:08:17,369 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:17,406 INFO L93 Difference]: Finished difference Result 115 states and 133 transitions. [2022-11-21 16:08:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:08:17,407 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-21 16:08:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:17,408 INFO L225 Difference]: With dead ends: 115 [2022-11-21 16:08:17,408 INFO L226 Difference]: Without dead ends: 115 [2022-11-21 16:08:17,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:08:17,411 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:17,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 129 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-21 16:08:17,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2022-11-21 16:08:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2022-11-21 16:08:17,417 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 20 [2022-11-21 16:08:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:17,420 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2022-11-21 16:08:17,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2022-11-21 16:08:17,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 16:08:17,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:17,423 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] [2022-11-21 16:08:17,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:08:17,424 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:17,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1094114349, now seen corresponding path program 1 times [2022-11-21 16:08:17,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:17,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435092793] [2022-11-21 16:08:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:17,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:18,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:18,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435092793] [2022-11-21 16:08:18,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435092793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:18,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627150003] [2022-11-21 16:08:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:18,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:18,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:18,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:18,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:08:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:18,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-21 16:08:18,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:18,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-21 16:08:18,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:08:18,640 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-21 16:08:18,640 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 [2022-11-21 16:08:18,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:08:18,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:18,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2022-11-21 16:08:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:18,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:19,111 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 14 [2022-11-21 16:08:19,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-21 16:08:19,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:19,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627150003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:19,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:19,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2022-11-21 16:08:19,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17634841] [2022-11-21 16:08:19,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:19,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 16:08:19,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 16:08:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-11-21 16:08:19,442 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:24,900 INFO L93 Difference]: Finished difference Result 316 states and 351 transitions. [2022-11-21 16:08:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-21 16:08:24,901 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-21 16:08:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:24,902 INFO L225 Difference]: With dead ends: 316 [2022-11-21 16:08:24,902 INFO L226 Difference]: Without dead ends: 316 [2022-11-21 16:08:24,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1430, Invalid=4732, Unknown=0, NotChecked=0, Total=6162 [2022-11-21 16:08:24,906 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1703 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:24,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1703 Valid, 400 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 16:08:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-21 16:08:24,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 113. [2022-11-21 16:08:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 107 states have (on average 1.280373831775701) internal successors, (137), 112 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) [2022-11-21 16:08:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2022-11-21 16:08:24,912 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 20 [2022-11-21 16:08:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:24,913 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2022-11-21 16:08:24,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2022-11-21 16:08:24,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 16:08:24,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:24,914 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] [2022-11-21 16:08:24,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:25,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:08:25,121 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:25,121 INFO L85 PathProgramCache]: Analyzing trace with hash 74397359, now seen corresponding path program 1 times [2022-11-21 16:08:25,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:25,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203939003] [2022-11-21 16:08:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:25,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:25,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:25,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203939003] [2022-11-21 16:08:25,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203939003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:25,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:25,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:08:25,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282971753] [2022-11-21 16:08:25,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:25,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:08:25,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:25,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:08:25,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:08:25,221 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-11-21 16:08:25,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:25,254 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2022-11-21 16:08:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:08:25,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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 [2022-11-21 16:08:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:25,256 INFO L225 Difference]: With dead ends: 125 [2022-11-21 16:08:25,256 INFO L226 Difference]: Without dead ends: 125 [2022-11-21 16:08:25,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:08:25,257 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 66 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:25,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 73 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-21 16:08:25,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 76. [2022-11-21 16:08:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 75 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-11-21 16:08:25,264 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 20 [2022-11-21 16:08:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:25,265 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-11-21 16:08:25,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 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) [2022-11-21 16:08:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-11-21 16:08:25,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:08:25,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:25,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:25,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 16:08:25,271 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:25,271 INFO L85 PathProgramCache]: Analyzing trace with hash -442195040, now seen corresponding path program 1 times [2022-11-21 16:08:25,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:25,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771941822] [2022-11-21 16:08:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:25,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:25,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:25,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:25,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771941822] [2022-11-21 16:08:25,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771941822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:25,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:25,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:08:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322737138] [2022-11-21 16:08:25,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:25,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:08:25,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:08:25,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:08:25,372 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:25,452 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-21 16:08:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:08:25,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 16:08:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:25,455 INFO L225 Difference]: With dead ends: 75 [2022-11-21 16:08:25,455 INFO L226 Difference]: Without dead ends: 75 [2022-11-21 16:08:25,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:08:25,456 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:25,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 84 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-21 16:08:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-21 16:08:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2857142857142858) internal successors, (90), 74 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) [2022-11-21 16:08:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2022-11-21 16:08:25,459 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 21 [2022-11-21 16:08:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:25,460 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2022-11-21 16:08:25,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2022-11-21 16:08:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:08:25,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:25,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:25,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 16:08:25,461 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:25,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash -442195039, now seen corresponding path program 1 times [2022-11-21 16:08:25,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:25,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284736222] [2022-11-21 16:08:25,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:25,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:25,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:25,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284736222] [2022-11-21 16:08:25,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284736222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:25,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:25,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:08:25,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848711379] [2022-11-21 16:08:25,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:25,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:08:25,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:25,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:08:25,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:08:25,758 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:25,923 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2022-11-21 16:08:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:08:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 16:08:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:25,926 INFO L225 Difference]: With dead ends: 83 [2022-11-21 16:08:25,926 INFO L226 Difference]: Without dead ends: 83 [2022-11-21 16:08:25,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:08:25,927 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 132 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:25,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 99 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-21 16:08:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2022-11-21 16:08:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 76 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2022-11-21 16:08:25,931 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 21 [2022-11-21 16:08:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:25,932 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2022-11-21 16:08:25,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2022-11-21 16:08:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:08:25,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:25,932 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] [2022-11-21 16:08:25,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 16:08:25,933 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1330977111, now seen corresponding path program 2 times [2022-11-21 16:08:25,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:25,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777287384] [2022-11-21 16:08:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:25,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:26,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:26,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777287384] [2022-11-21 16:08:26,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777287384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:26,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206119140] [2022-11-21 16:08:26,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:08:26,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:26,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:26,540 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:26,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:08:26,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:08:26,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-21 16:08:26,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:26,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:08:26,963 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 [2022-11-21 16:08:27,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-21 16:08:27,315 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 16:08:27,316 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 [2022-11-21 16:08:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:27,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:27,584 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:27,584 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 26 treesize of output 27 [2022-11-21 16:08:27,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:27,594 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 40 treesize of output 34 [2022-11-21 16:08:27,984 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 [2022-11-21 16:08:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:28,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206119140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:28,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:28,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2022-11-21 16:08:28,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691338440] [2022-11-21 16:08:28,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:28,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 16:08:28,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:28,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 16:08:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1075, Unknown=11, NotChecked=0, Total=1190 [2022-11-21 16:08:28,009 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2022-11-21 16:08:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:33,716 INFO L93 Difference]: Finished difference Result 351 states and 392 transitions. [2022-11-21 16:08:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-21 16:08:33,724 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-21 16:08:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:33,725 INFO L225 Difference]: With dead ends: 351 [2022-11-21 16:08:33,725 INFO L226 Difference]: Without dead ends: 351 [2022-11-21 16:08:33,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1080, Invalid=5715, Unknown=11, NotChecked=0, Total=6806 [2022-11-21 16:08:33,729 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1067 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:33,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 1020 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 16:08:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-21 16:08:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 120. [2022-11-21 16:08:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.2521739130434784) internal successors, (144), 119 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) [2022-11-21 16:08:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2022-11-21 16:08:33,735 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 26 [2022-11-21 16:08:33,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:33,735 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2022-11-21 16:08:33,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2022-11-21 16:08:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2022-11-21 16:08:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:08:33,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:33,737 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] [2022-11-21 16:08:33,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:33,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:33,943 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:33,944 INFO L85 PathProgramCache]: Analyzing trace with hash 803583084, now seen corresponding path program 1 times [2022-11-21 16:08:33,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:33,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663701043] [2022-11-21 16:08:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:33,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663701043] [2022-11-21 16:08:34,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663701043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:34,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:34,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:08:34,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241524126] [2022-11-21 16:08:34,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:34,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:08:34,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:34,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:08:34,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:08:34,113 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:34,173 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2022-11-21 16:08:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:08:34,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-21 16:08:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:34,175 INFO L225 Difference]: With dead ends: 119 [2022-11-21 16:08:34,175 INFO L226 Difference]: Without dead ends: 115 [2022-11-21 16:08:34,175 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 [2022-11-21 16:08:34,176 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:34,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:08:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-21 16:08:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-21 16:08:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 114 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-11-21 16:08:34,181 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 27 [2022-11-21 16:08:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:34,181 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-11-21 16:08:34,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-11-21 16:08:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:08:34,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:34,182 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 16:08:34,183 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:34,184 INFO L85 PathProgramCache]: Analyzing trace with hash 805151438, now seen corresponding path program 1 times [2022-11-21 16:08:34,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:34,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406124720] [2022-11-21 16:08:34,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:34,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:34,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:34,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406124720] [2022-11-21 16:08:34,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406124720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:08:34,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:08:34,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:08:34,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457278698] [2022-11-21 16:08:34,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:08:34,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:08:34,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:34,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:08:34,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:08:34,313 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:34,369 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2022-11-21 16:08:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:08:34,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-21 16:08:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:34,371 INFO L225 Difference]: With dead ends: 170 [2022-11-21 16:08:34,371 INFO L226 Difference]: Without dead ends: 137 [2022-11-21 16:08:34,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:08:34,372 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:34,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:08:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-21 16:08:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-11-21 16:08:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 133 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2022-11-21 16:08:34,377 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 27 [2022-11-21 16:08:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:34,377 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2022-11-21 16:08:34,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2022-11-21 16:08:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-21 16:08:34,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:34,378 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:34,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-21 16:08:34,379 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1000286896, now seen corresponding path program 1 times [2022-11-21 16:08:34,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:34,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551230225] [2022-11-21 16:08:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:34,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:34,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:34,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551230225] [2022-11-21 16:08:34,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551230225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:34,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860722174] [2022-11-21 16:08:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:34,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:34,636 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:34,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:08:34,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:34,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-21 16:08:34,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:34,776 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 [2022-11-21 16:08:35,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:35,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 17 [2022-11-21 16:08:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:35,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:35,742 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 [2022-11-21 16:08:35,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-21 16:08:35,758 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 39 treesize of output 31 [2022-11-21 16:08:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:35,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860722174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:35,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:35,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-21 16:08:35,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666830053] [2022-11-21 16:08:35,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:35,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 16:08:35,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 16:08:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-11-21 16:08:35,791 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 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) [2022-11-21 16:08:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:38,074 INFO L93 Difference]: Finished difference Result 167 states and 181 transitions. [2022-11-21 16:08:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 16:08:38,075 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 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) Word has length 27 [2022-11-21 16:08:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:38,076 INFO L225 Difference]: With dead ends: 167 [2022-11-21 16:08:38,076 INFO L226 Difference]: Without dead ends: 153 [2022-11-21 16:08:38,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=485, Invalid=2377, Unknown=0, NotChecked=0, Total=2862 [2022-11-21 16:08:38,078 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 255 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:38,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 287 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:08:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-21 16:08:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 138. [2022-11-21 16:08:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 137 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2022-11-21 16:08:38,083 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 27 [2022-11-21 16:08:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:38,084 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2022-11-21 16:08:38,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 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) [2022-11-21 16:08:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2022-11-21 16:08:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:08:38,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:38,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:38,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:38,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-21 16:08:38,291 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash 697237728, now seen corresponding path program 1 times [2022-11-21 16:08:38,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:38,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839334849] [2022-11-21 16:08:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:38,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:39,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:39,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839334849] [2022-11-21 16:08:39,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839334849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:39,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258653243] [2022-11-21 16:08:39,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:39,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:39,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:39,246 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:39,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:08:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:39,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-21 16:08:39,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:39,374 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 [2022-11-21 16:08:39,647 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 17 treesize of output 13 [2022-11-21 16:08:39,723 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 20 treesize of output 22 [2022-11-21 16:08:40,149 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-11-21 16:08:40,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 20 [2022-11-21 16:08:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:40,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:40,367 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_349 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_349) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)))) is different from false [2022-11-21 16:08:40,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:40,382 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 51 treesize of output 37 [2022-11-21 16:08:40,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:40,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 61 [2022-11-21 16:08:40,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:40,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2022-11-21 16:08:40,865 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 [2022-11-21 16:08:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:40,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258653243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:40,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:40,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2022-11-21 16:08:40,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431876679] [2022-11-21 16:08:40,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:40,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-21 16:08:40,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:40,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-21 16:08:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=996, Unknown=1, NotChecked=64, Total=1190 [2022-11-21 16:08:40,933 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:42,318 INFO L93 Difference]: Finished difference Result 206 states and 227 transitions. [2022-11-21 16:08:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:08:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-21 16:08:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:42,320 INFO L225 Difference]: With dead ends: 206 [2022-11-21 16:08:42,321 INFO L226 Difference]: Without dead ends: 206 [2022-11-21 16:08:42,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=400, Invalid=1673, Unknown=1, NotChecked=88, Total=2162 [2022-11-21 16:08:42,322 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 340 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:42,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 350 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 348 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-11-21 16:08:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-21 16:08:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 161. [2022-11-21 16:08:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.1528662420382165) internal successors, (181), 160 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 181 transitions. [2022-11-21 16:08:42,328 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 181 transitions. Word has length 28 [2022-11-21 16:08:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:42,328 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 181 transitions. [2022-11-21 16:08:42,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 181 transitions. [2022-11-21 16:08:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-21 16:08:42,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:42,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:42,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-21 16:08:42,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-21 16:08:42,536 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:42,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1853207525, now seen corresponding path program 3 times [2022-11-21 16:08:42,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:42,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595348830] [2022-11-21 16:08:42,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:42,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:43,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:43,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595348830] [2022-11-21 16:08:43,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595348830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:43,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518571715] [2022-11-21 16:08:43,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:08:43,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:43,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:43,238 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:43,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:08:43,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:08:43,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:43,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-21 16:08:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:43,403 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 [2022-11-21 16:08:43,726 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 [2022-11-21 16:08:43,791 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 [2022-11-21 16:08:44,127 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 16:08:44,127 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 [2022-11-21 16:08:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:44,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:08:44,413 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-11-21 16:08:44,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:44,425 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 26 treesize of output 27 [2022-11-21 16:08:44,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:08:44,437 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 40 treesize of output 34 [2022-11-21 16:08:44,881 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 [2022-11-21 16:08:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:08:44,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518571715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:08:44,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:08:44,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-11-21 16:08:44,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837024941] [2022-11-21 16:08:44,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:08:44,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-21 16:08:44,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:08:44,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-21 16:08:44,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1443, Unknown=1, NotChecked=76, Total=1640 [2022-11-21 16:08:44,911 INFO L87 Difference]: Start difference. First operand 161 states and 181 transitions. Second operand has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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) [2022-11-21 16:08:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:08:52,422 INFO L93 Difference]: Finished difference Result 276 states and 300 transitions. [2022-11-21 16:08:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-21 16:08:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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) Word has length 32 [2022-11-21 16:08:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:08:52,425 INFO L225 Difference]: With dead ends: 276 [2022-11-21 16:08:52,425 INFO L226 Difference]: Without dead ends: 244 [2022-11-21 16:08:52,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 5 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=834, Invalid=5331, Unknown=1, NotChecked=154, Total=6320 [2022-11-21 16:08:52,428 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 490 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1523 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:08:52,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 978 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1523 Invalid, 0 Unknown, 144 Unchecked, 1.6s Time] [2022-11-21 16:08:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-21 16:08:52,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 187. [2022-11-21 16:08:52,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 183 states have (on average 1.1420765027322404) internal successors, (209), 186 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:08:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 209 transitions. [2022-11-21 16:08:52,441 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 209 transitions. Word has length 32 [2022-11-21 16:08:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:08:52,442 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 209 transitions. [2022-11-21 16:08:52,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.073170731707317) internal successors, (85), 41 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) [2022-11-21 16:08:52,442 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 209 transitions. [2022-11-21 16:08:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 16:08:52,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:08:52,443 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:08:52,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:08:52,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-21 16:08:52,648 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:08:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:08:52,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1456363364, now seen corresponding path program 2 times [2022-11-21 16:08:52,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:08:52,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516391897] [2022-11-21 16:08:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:08:52,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:08:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:08:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:54,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:08:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516391897] [2022-11-21 16:08:54,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516391897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:08:54,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554677175] [2022-11-21 16:08:54,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:08:54,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:08:54,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:08:54,040 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:08:54,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:08:54,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:08:54,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:08:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-21 16:08:54,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:08:54,203 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 [2022-11-21 16:08:54,588 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 17 treesize of output 13 [2022-11-21 16:08:54,683 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 20 treesize of output 22 [2022-11-21 16:08:57,168 INFO L321 Elim1Store]: treesize reduction 15, result has 51.6 percent of original size [2022-11-21 16:08:57,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 30 [2022-11-21 16:08:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:08:57,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:09:00,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:00,514 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 77 treesize of output 49 [2022-11-21 16:09:00,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:00,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 90 [2022-11-21 16:09:00,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:00,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 22 [2022-11-21 16:09:01,488 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 [2022-11-21 16:09:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:09:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554677175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:09:01,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:09:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2022-11-21 16:09:01,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420943043] [2022-11-21 16:09:01,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:09:01,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 16:09:01,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 16:09:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1613, Unknown=14, NotChecked=0, Total=1806 [2022-11-21 16:09:01,584 INFO L87 Difference]: Start difference. First operand 187 states and 209 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:09:06,295 INFO L93 Difference]: Finished difference Result 304 states and 334 transitions. [2022-11-21 16:09:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-21 16:09:06,296 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-21 16:09:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:09:06,297 INFO L225 Difference]: With dead ends: 304 [2022-11-21 16:09:06,298 INFO L226 Difference]: Without dead ends: 304 [2022-11-21 16:09:06,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=904, Invalid=3638, Unknown=14, NotChecked=0, Total=4556 [2022-11-21 16:09:06,300 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 665 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:09:06,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 464 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-21 16:09:06,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-21 16:09:06,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 208. [2022-11-21 16:09:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.1470588235294117) internal successors, (234), 207 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:06,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2022-11-21 16:09:06,307 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 34 [2022-11-21 16:09:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:09:06,308 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2022-11-21 16:09:06,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2022-11-21 16:09:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 16:09:06,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:09:06,310 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-21 16:09:06,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:09:06,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 16:09:06,517 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:09:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:09:06,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1627622054, now seen corresponding path program 2 times [2022-11-21 16:09:06,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:09:06,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509669153] [2022-11-21 16:09:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:06,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:09:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:09:06,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509669153] [2022-11-21 16:09:06,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509669153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:09:06,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244536225] [2022-11-21 16:09:06,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:09:06,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:06,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:09:06,944 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:09:06,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:09:07,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:09:07,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:09:07,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 16:09:07,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:09:07,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:09:07,364 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 [2022-11-21 16:09:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:09:07,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:09:07,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244536225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:09:07,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:09:07,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2022-11-21 16:09:07,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296096609] [2022-11-21 16:09:07,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:09:07,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:09:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:07,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:09:07,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:09:07,397 INFO L87 Difference]: Start difference. First operand 208 states and 234 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:09:07,659 INFO L93 Difference]: Finished difference Result 269 states and 298 transitions. [2022-11-21 16:09:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:09:07,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-21 16:09:07,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:09:07,660 INFO L225 Difference]: With dead ends: 269 [2022-11-21 16:09:07,661 INFO L226 Difference]: Without dead ends: 231 [2022-11-21 16:09:07,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:09:07,662 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:09:07,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 213 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:09:07,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-21 16:09:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 197. [2022-11-21 16:09:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 193 states have (on average 1.145077720207254) internal successors, (221), 196 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 221 transitions. [2022-11-21 16:09:07,674 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 221 transitions. Word has length 37 [2022-11-21 16:09:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:09:07,674 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 221 transitions. [2022-11-21 16:09:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 221 transitions. [2022-11-21 16:09:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 16:09:07,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:09:07,676 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-21 16:09:07,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:09:07,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:07,882 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:09:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:09:07,883 INFO L85 PathProgramCache]: Analyzing trace with hash 423361944, now seen corresponding path program 1 times [2022-11-21 16:09:07,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:09:07,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356626228] [2022-11-21 16:09:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:07,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:09:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:08,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:09:08,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356626228] [2022-11-21 16:09:08,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356626228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:09:08,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375709943] [2022-11-21 16:09:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:08,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:09:08,316 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:09:08,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:09:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:08,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-21 16:09:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:09:08,556 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 [2022-11-21 16:09:08,793 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 16:09:08,793 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 [2022-11-21 16:09:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 16:09:08,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:09:08,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375709943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:09:08,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:09:08,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 19 [2022-11-21 16:09:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64099792] [2022-11-21 16:09:08,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:09:08,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:09:08,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:09:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:09:08,828 INFO L87 Difference]: Start difference. First operand 197 states and 221 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:09:09,246 INFO L93 Difference]: Finished difference Result 274 states and 305 transitions. [2022-11-21 16:09:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-21 16:09:09,248 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-21 16:09:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:09:09,249 INFO L225 Difference]: With dead ends: 274 [2022-11-21 16:09:09,249 INFO L226 Difference]: Without dead ends: 240 [2022-11-21 16:09:09,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-11-21 16:09:09,251 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 83 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:09:09,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 209 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:09:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-21 16:09:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 201. [2022-11-21 16:09:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 197 states have (on average 1.1522842639593909) internal successors, (227), 200 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 227 transitions. [2022-11-21 16:09:09,257 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 227 transitions. Word has length 37 [2022-11-21 16:09:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:09:09,260 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 227 transitions. [2022-11-21 16:09:09,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 227 transitions. [2022-11-21 16:09:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-21 16:09:09,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:09:09,262 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:09:09,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 16:09:09,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-21 16:09:09,469 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:09:09,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:09:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash 763708385, now seen corresponding path program 4 times [2022-11-21 16:09:09,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:09:09,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632240756] [2022-11-21 16:09:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:09,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:09:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:10,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:09:10,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632240756] [2022-11-21 16:09:10,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632240756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:09:10,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877835869] [2022-11-21 16:09:10,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:09:10,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:10,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:09:10,196 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:09:10,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 16:09:10,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:09:10,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:09:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-21 16:09:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:09:10,375 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 [2022-11-21 16:09:10,894 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 [2022-11-21 16:09:10,964 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 [2022-11-21 16:09:11,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:09:11,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:11,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-21 16:09:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:11,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:09:11,786 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_529 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_529) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-21 16:09:11,795 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:11,796 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 26 treesize of output 27 [2022-11-21 16:09:11,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:11,806 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 40 treesize of output 34 [2022-11-21 16:09:11,820 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 [2022-11-21 16:09:12,469 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 [2022-11-21 16:09:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:12,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877835869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:09:12,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:09:12,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 47 [2022-11-21 16:09:12,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655247241] [2022-11-21 16:09:12,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:09:12,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-21 16:09:12,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:12,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-21 16:09:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1941, Unknown=1, NotChecked=88, Total=2162 [2022-11-21 16:09:12,505 INFO L87 Difference]: Start difference. First operand 201 states and 227 transitions. Second operand has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:09:19,735 INFO L93 Difference]: Finished difference Result 422 states and 456 transitions. [2022-11-21 16:09:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-21 16:09:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-21 16:09:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:09:19,742 INFO L225 Difference]: With dead ends: 422 [2022-11-21 16:09:19,742 INFO L226 Difference]: Without dead ends: 375 [2022-11-21 16:09:19,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1041, Invalid=7333, Unknown=2, NotChecked=180, Total=8556 [2022-11-21 16:09:19,745 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 627 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 2297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:09:19,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 1483 Invalid, 2297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2164 Invalid, 0 Unknown, 109 Unchecked, 2.0s Time] [2022-11-21 16:09:19,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-21 16:09:19,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 230. [2022-11-21 16:09:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 226 states have (on average 1.1415929203539823) internal successors, (258), 229 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 258 transitions. [2022-11-21 16:09:19,755 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 258 transitions. Word has length 38 [2022-11-21 16:09:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:09:19,755 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 258 transitions. [2022-11-21 16:09:19,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.1914893617021276) internal successors, (103), 47 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 258 transitions. [2022-11-21 16:09:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:09:19,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:09:19,757 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:09:19,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 16:09:19,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-21 16:09:19,964 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:09:19,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:09:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash -910015720, now seen corresponding path program 3 times [2022-11-21 16:09:19,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:09:19,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752242390] [2022-11-21 16:09:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:09:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:09:21,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:09:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752242390] [2022-11-21 16:09:21,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752242390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:09:21,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874729651] [2022-11-21 16:09:21,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:09:21,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:21,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:09:21,784 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:09:21,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 16:09:22,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 16:09:22,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:09:22,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-21 16:09:22,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:09:22,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-21 16:09:22,832 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-21 16:09:22,835 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 [2022-11-21 16:09:23,807 INFO L321 Elim1Store]: treesize reduction 37, result has 41.3 percent of original size [2022-11-21 16:09:23,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 47 [2022-11-21 16:09:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:09:23,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:09:24,375 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 71 treesize of output 63 [2022-11-21 16:09:24,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:24,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 61 [2022-11-21 16:09:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:09:25,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874729651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:09:25,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:09:25,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 51 [2022-11-21 16:09:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940609752] [2022-11-21 16:09:25,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:09:25,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-21 16:09:25,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:25,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-21 16:09:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2310, Unknown=0, NotChecked=0, Total=2550 [2022-11-21 16:09:25,340 INFO L87 Difference]: Start difference. First operand 230 states and 258 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:09:38,911 INFO L93 Difference]: Finished difference Result 465 states and 505 transitions. [2022-11-21 16:09:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-21 16:09:38,916 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-21 16:09:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:09:38,918 INFO L225 Difference]: With dead ends: 465 [2022-11-21 16:09:38,918 INFO L226 Difference]: Without dead ends: 439 [2022-11-21 16:09:38,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1713, Invalid=8793, Unknown=0, NotChecked=0, Total=10506 [2022-11-21 16:09:38,922 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1210 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1210 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:09:38,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1210 Valid, 697 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-21 16:09:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-21 16:09:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 245. [2022-11-21 16:09:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 241 states have (on average 1.1452282157676348) internal successors, (276), 244 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 276 transitions. [2022-11-21 16:09:38,932 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 276 transitions. Word has length 40 [2022-11-21 16:09:38,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:09:38,932 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 276 transitions. [2022-11-21 16:09:38,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:38,933 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 276 transitions. [2022-11-21 16:09:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-21 16:09:38,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:09:38,934 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-21 16:09:38,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 16:09:39,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:39,151 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:09:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:09:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2063863029, now seen corresponding path program 1 times [2022-11-21 16:09:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:09:39,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745782768] [2022-11-21 16:09:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:39,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:09:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:09:39,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:09:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745782768] [2022-11-21 16:09:39,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745782768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:09:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205720920] [2022-11-21 16:09:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:39,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:39,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:09:39,508 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:09:39,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 16:09:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-21 16:09:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:09:39,677 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 [2022-11-21 16:09:39,953 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 [2022-11-21 16:09:40,214 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 [2022-11-21 16:09:40,388 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 16:09:40,388 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 [2022-11-21 16:09:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:40,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:09:40,530 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_609 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_609) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-11-21 16:09:40,542 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_609 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_609) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)) 0)) is different from false [2022-11-21 16:09:40,557 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_609 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~dst#1.base| v_ArrVal_609) |c_ULTIMATE.start_cstrncat_~src#1.base|) (+ |c_ULTIMATE.start_cstrncat_~src#1.offset| 1)) 0)) is different from false [2022-11-21 16:09:40,565 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_609 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base| v_ArrVal_609) |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString2~0#1.offset| 1)) 0)) is different from false [2022-11-21 16:09:40,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:40,575 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 [2022-11-21 16:09:40,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:40,586 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 [2022-11-21 16:09:41,024 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 [2022-11-21 16:09:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-21 16:09:41,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205720920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:09:41,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:09:41,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 36 [2022-11-21 16:09:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308974450] [2022-11-21 16:09:41,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:09:41,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 16:09:41,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:41,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 16:09:41,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=883, Unknown=4, NotChecked=252, Total=1260 [2022-11-21 16:09:41,034 INFO L87 Difference]: Start difference. First operand 245 states and 276 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:09:44,655 INFO L93 Difference]: Finished difference Result 339 states and 368 transitions. [2022-11-21 16:09:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-21 16:09:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-21 16:09:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:09:44,657 INFO L225 Difference]: With dead ends: 339 [2022-11-21 16:09:44,658 INFO L226 Difference]: Without dead ends: 313 [2022-11-21 16:09:44,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=929, Invalid=4484, Unknown=5, NotChecked=588, Total=6006 [2022-11-21 16:09:44,659 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 624 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 35 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:09:44,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 557 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 687 Invalid, 9 Unknown, 358 Unchecked, 0.8s Time] [2022-11-21 16:09:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-21 16:09:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 235. [2022-11-21 16:09:44,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 231 states have (on average 1.1428571428571428) internal successors, (264), 234 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 264 transitions. [2022-11-21 16:09:44,667 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 264 transitions. Word has length 41 [2022-11-21 16:09:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:09:44,667 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 264 transitions. [2022-11-21 16:09:44,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 264 transitions. [2022-11-21 16:09:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 16:09:44,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:09:44,669 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:09:44,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 16:09:44,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-21 16:09:44,875 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:09:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:09:44,876 INFO L85 PathProgramCache]: Analyzing trace with hash 734238365, now seen corresponding path program 5 times [2022-11-21 16:09:44,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:09:44,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998788523] [2022-11-21 16:09:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:44,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:09:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:09:45,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998788523] [2022-11-21 16:09:45,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998788523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:09:45,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279808609] [2022-11-21 16:09:45,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:09:45,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:45,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:09:45,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:09:45,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 16:09:45,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-21 16:09:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:09:45,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-21 16:09:45,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:09:46,033 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 [2022-11-21 16:09:46,549 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 [2022-11-21 16:09:46,620 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 [2022-11-21 16:09:47,275 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 16:09:47,275 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 [2022-11-21 16:09:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:47,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:09:47,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:47,876 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 26 treesize of output 27 [2022-11-21 16:09:47,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:47,886 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 40 treesize of output 34 [2022-11-21 16:09:48,625 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 [2022-11-21 16:09:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:48,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279808609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:09:48,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:09:48,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2022-11-21 16:09:48,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727059650] [2022-11-21 16:09:48,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:09:48,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-21 16:09:48,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-21 16:09:48,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2585, Unknown=11, NotChecked=0, Total=2756 [2022-11-21 16:09:48,659 INFO L87 Difference]: Start difference. First operand 235 states and 264 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:56,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:09:56,754 INFO L93 Difference]: Finished difference Result 497 states and 536 transitions. [2022-11-21 16:09:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-21 16:09:56,754 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-21 16:09:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:09:56,756 INFO L225 Difference]: With dead ends: 497 [2022-11-21 16:09:56,756 INFO L226 Difference]: Without dead ends: 446 [2022-11-21 16:09:56,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1205, Invalid=9496, Unknown=11, NotChecked=0, Total=10712 [2022-11-21 16:09:56,758 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 564 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 2865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:09:56,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1898 Invalid, 2865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2839 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-21 16:09:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-21 16:09:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 264. [2022-11-21 16:09:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 260 states have (on average 1.1346153846153846) internal successors, (295), 263 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 295 transitions. [2022-11-21 16:09:56,767 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 295 transitions. Word has length 44 [2022-11-21 16:09:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:09:56,767 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 295 transitions. [2022-11-21 16:09:56,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:09:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 295 transitions. [2022-11-21 16:09:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:09:56,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:09:56,768 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-21 16:09:56,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 16:09:56,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:56,975 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:09:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:09:56,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1097682670, now seen corresponding path program 2 times [2022-11-21 16:09:56,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:09:56,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117057631] [2022-11-21 16:09:56,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:09:56,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:09:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:09:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:09:57,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:09:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117057631] [2022-11-21 16:09:57,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117057631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:09:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742892572] [2022-11-21 16:09:57,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:09:57,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:09:57,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:09:57,418 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:09:57,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 16:09:57,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:09:57,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:09:57,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-21 16:09:57,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:09:57,575 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 [2022-11-21 16:09:57,817 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 [2022-11-21 16:09:58,204 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 [2022-11-21 16:09:58,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:09:58,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:58,406 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 [2022-11-21 16:09:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-21 16:09:58,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:09:58,517 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_697 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_697) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) |c_ULTIMATE.start_cstrncat_~s~0#1.offset|) 0)) is different from false [2022-11-21 16:09:58,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:58,849 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 [2022-11-21 16:09:58,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:09:58,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-11-21 16:09:58,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:09:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 1 not checked. [2022-11-21 16:09:59,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742892572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:09:59,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:09:59,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-11-21 16:09:59,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078783934] [2022-11-21 16:09:59,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:09:59,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-21 16:09:59,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:09:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-21 16:09:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1354, Unknown=3, NotChecked=74, Total=1560 [2022-11-21 16:09:59,349 INFO L87 Difference]: Start difference. First operand 264 states and 295 transitions. Second operand has 40 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:05,757 INFO L93 Difference]: Finished difference Result 539 states and 574 transitions. [2022-11-21 16:10:05,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-21 16:10:05,758 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-21 16:10:05,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:05,759 INFO L225 Difference]: With dead ends: 539 [2022-11-21 16:10:05,759 INFO L226 Difference]: Without dead ends: 413 [2022-11-21 16:10:05,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1471, Invalid=8819, Unknown=16, NotChecked=200, Total=10506 [2022-11-21 16:10:05,761 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 724 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 33 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:05,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 529 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1180 Invalid, 14 Unknown, 107 Unchecked, 1.3s Time] [2022-11-21 16:10:05,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-21 16:10:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 314. [2022-11-21 16:10:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 310 states have (on average 1.1258064516129032) internal successors, (349), 313 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 349 transitions. [2022-11-21 16:10:05,770 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 349 transitions. Word has length 45 [2022-11-21 16:10:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:05,770 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 349 transitions. [2022-11-21 16:10:05,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.55) internal successors, (102), 40 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 349 transitions. [2022-11-21 16:10:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-21 16:10:05,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:05,772 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:05,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:05,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-21 16:10:05,978 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:10:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1476579412, now seen corresponding path program 4 times [2022-11-21 16:10:05,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:05,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364781721] [2022-11-21 16:10:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:05,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:10:07,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364781721] [2022-11-21 16:10:07,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364781721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694506690] [2022-11-21 16:10:07,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:10:07,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:07,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:07,813 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:07,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 16:10:07,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:10:07,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:07,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-21 16:10:07,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:08,000 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 [2022-11-21 16:10:08,520 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 17 treesize of output 13 [2022-11-21 16:10:08,614 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 20 treesize of output 22 [2022-11-21 16:10:10,588 INFO L321 Elim1Store]: treesize reduction 23, result has 54.9 percent of original size [2022-11-21 16:10:10,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 50 [2022-11-21 16:10:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:10:10,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:11,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:10:11,276 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 129 treesize of output 73 [2022-11-21 16:10:11,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:10:11,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 148 [2022-11-21 16:10:11,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 36 [2022-11-21 16:10:12,631 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 [2022-11-21 16:10:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:10:12,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694506690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:12,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:12,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 57 [2022-11-21 16:10:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13327803] [2022-11-21 16:10:12,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:12,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-21 16:10:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:12,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-21 16:10:12,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2889, Unknown=5, NotChecked=0, Total=3192 [2022-11-21 16:10:12,681 INFO L87 Difference]: Start difference. First operand 314 states and 349 transitions. Second operand has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:27,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:27,119 INFO L93 Difference]: Finished difference Result 546 states and 594 transitions. [2022-11-21 16:10:27,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-21 16:10:27,120 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-21 16:10:27,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:27,122 INFO L225 Difference]: With dead ends: 546 [2022-11-21 16:10:27,122 INFO L226 Difference]: Without dead ends: 516 [2022-11-21 16:10:27,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=1810, Invalid=9105, Unknown=5, NotChecked=0, Total=10920 [2022-11-21 16:10:27,124 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1273 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:27,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 668 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-21 16:10:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-11-21 16:10:27,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 333. [2022-11-21 16:10:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 329 states have (on average 1.127659574468085) internal successors, (371), 332 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 371 transitions. [2022-11-21 16:10:27,143 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 371 transitions. Word has length 46 [2022-11-21 16:10:27,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:27,144 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 371 transitions. [2022-11-21 16:10:27,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:27,144 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 371 transitions. [2022-11-21 16:10:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-21 16:10:27,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:27,145 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:27,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:27,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:27,357 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:10:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:27,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1776899047, now seen corresponding path program 6 times [2022-11-21 16:10:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:27,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838097288] [2022-11-21 16:10:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:27,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:28,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:28,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838097288] [2022-11-21 16:10:28,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838097288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:28,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259837231] [2022-11-21 16:10:28,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:10:28,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:28,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:28,517 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:28,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 16:10:28,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-21 16:10:28,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:28,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-21 16:10:28,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:28,789 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 [2022-11-21 16:10:29,342 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 [2022-11-21 16:10:29,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-21 16:10:30,161 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 16:10:30,161 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 [2022-11-21 16:10:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:30,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:30,727 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_785 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_785) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-21 16:10:30,749 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:10:30,749 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 26 treesize of output 27 [2022-11-21 16:10:30,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:10:30,758 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 40 treesize of output 34 [2022-11-21 16:10:31,565 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 [2022-11-21 16:10:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:10:31,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259837231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:31,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:31,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 59 [2022-11-21 16:10:31,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206830368] [2022-11-21 16:10:31,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:31,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-21 16:10:31,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-21 16:10:31,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3134, Unknown=1, NotChecked=112, Total=3422 [2022-11-21 16:10:31,600 INFO L87 Difference]: Start difference. First operand 333 states and 371 transitions. Second operand has 59 states, 59 states have (on average 2.3559322033898304) internal successors, (139), 59 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:10:41,048 INFO L93 Difference]: Finished difference Result 660 states and 711 transitions. [2022-11-21 16:10:41,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-21 16:10:41,049 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.3559322033898304) internal successors, (139), 59 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-21 16:10:41,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:10:41,052 INFO L225 Difference]: With dead ends: 660 [2022-11-21 16:10:41,052 INFO L226 Difference]: Without dead ends: 596 [2022-11-21 16:10:41,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 1 IntricatePredicates, 8 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1439, Invalid=11903, Unknown=2, NotChecked=228, Total=13572 [2022-11-21 16:10:41,054 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 949 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 3228 mSolverCounterSat, 26 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3228 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:10:41,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 2259 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3228 Invalid, 3 Unknown, 85 Unchecked, 2.7s Time] [2022-11-21 16:10:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-21 16:10:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 364. [2022-11-21 16:10:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 360 states have (on average 1.1222222222222222) internal successors, (404), 363 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:41,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 404 transitions. [2022-11-21 16:10:41,067 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 404 transitions. Word has length 50 [2022-11-21 16:10:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:10:41,067 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 404 transitions. [2022-11-21 16:10:41,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.3559322033898304) internal successors, (139), 59 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 404 transitions. [2022-11-21 16:10:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:10:41,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:10:41,069 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:10:41,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-21 16:10:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-21 16:10:41,276 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:10:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:10:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash -558804912, now seen corresponding path program 5 times [2022-11-21 16:10:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:10:41,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509282976] [2022-11-21 16:10:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:10:41,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:10:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:10:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 38 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:10:45,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:10:45,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509282976] [2022-11-21 16:10:45,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509282976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:10:45,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91511610] [2022-11-21 16:10:45,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:10:45,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:10:45,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:10:45,483 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:10:45,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 16:10:45,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-21 16:10:45,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:10:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-21 16:10:45,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:10:45,756 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 [2022-11-21 16:10:46,559 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 17 treesize of output 13 [2022-11-21 16:10:46,668 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 20 treesize of output 22 [2022-11-21 16:10:48,514 INFO L321 Elim1Store]: treesize reduction 27, result has 55.7 percent of original size [2022-11-21 16:10:48,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 71 treesize of output 60 [2022-11-21 16:10:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 18 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:10:48,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:10:49,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:10:49,181 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 155 treesize of output 85 [2022-11-21 16:10:49,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:10:49,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 161 treesize of output 177 [2022-11-21 16:10:49,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 43 [2022-11-21 16:10:49,666 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 16:10:51,121 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 [2022-11-21 16:10:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 48 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:10:51,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91511610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:10:51,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:10:51,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 63 [2022-11-21 16:10:51,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063043901] [2022-11-21 16:10:51,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:10:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-21 16:10:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:10:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-21 16:10:51,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3588, Unknown=5, NotChecked=0, Total=3906 [2022-11-21 16:10:51,182 INFO L87 Difference]: Start difference. First operand 364 states and 404 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:10:54,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:10:55,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:11:13,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:13,911 INFO L93 Difference]: Finished difference Result 739 states and 800 transitions. [2022-11-21 16:11:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-21 16:11:13,912 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-21 16:11:13,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:13,914 INFO L225 Difference]: With dead ends: 739 [2022-11-21 16:11:13,915 INFO L226 Difference]: Without dead ends: 689 [2022-11-21 16:11:13,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6141 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=2698, Invalid=19053, Unknown=5, NotChecked=0, Total=21756 [2022-11-21 16:11:13,917 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1435 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:13,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1435 Valid, 800 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1622 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-11-21 16:11:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-11-21 16:11:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 383. [2022-11-21 16:11:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 379 states have (on average 1.1240105540897098) internal successors, (426), 382 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 426 transitions. [2022-11-21 16:11:13,930 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 426 transitions. Word has length 52 [2022-11-21 16:11:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:13,931 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 426 transitions. [2022-11-21 16:11:13,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 426 transitions. [2022-11-21 16:11:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 16:11:13,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:13,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-11-21 16:11:13,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-21 16:11:14,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:14,140 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:11:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:14,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1217377784, now seen corresponding path program 1 times [2022-11-21 16:11:14,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:14,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769126114] [2022-11-21 16:11:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:14,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:11:14,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769126114] [2022-11-21 16:11:14,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769126114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:14,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284852534] [2022-11-21 16:11:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:14,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:14,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:14,533 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:14,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-21 16:11:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:14,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-21 16:11:14,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:11:15,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:11:15,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284852534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:15,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:15,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 34 [2022-11-21 16:11:15,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857185875] [2022-11-21 16:11:15,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:15,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 16:11:15,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:15,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 16:11:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 16:11:15,983 INFO L87 Difference]: Start difference. First operand 383 states and 426 transitions. Second operand has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 34 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:17,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:17,511 INFO L93 Difference]: Finished difference Result 463 states and 505 transitions. [2022-11-21 16:11:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-21 16:11:17,512 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 34 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-21 16:11:17,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:17,514 INFO L225 Difference]: With dead ends: 463 [2022-11-21 16:11:17,514 INFO L226 Difference]: Without dead ends: 431 [2022-11-21 16:11:17,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=856, Invalid=2804, Unknown=0, NotChecked=0, Total=3660 [2022-11-21 16:11:17,515 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 691 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:17,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 505 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 16:11:17,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-21 16:11:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 357. [2022-11-21 16:11:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.1274787535410764) internal successors, (398), 356 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 398 transitions. [2022-11-21 16:11:17,524 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 398 transitions. Word has length 52 [2022-11-21 16:11:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:17,524 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 398 transitions. [2022-11-21 16:11:17,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 34 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 398 transitions. [2022-11-21 16:11:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-21 16:11:17,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:17,525 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2022-11-21 16:11:17,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:17,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-21 16:11:17,732 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:11:17,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash -554980724, now seen corresponding path program 3 times [2022-11-21 16:11:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:17,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006526275] [2022-11-21 16:11:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:17,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:11:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006526275] [2022-11-21 16:11:18,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006526275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162435854] [2022-11-21 16:11:18,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:11:18,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:18,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:18,219 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:18,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-21 16:11:18,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 16:11:18,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-21 16:11:18,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:11:18,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:18,930 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 [2022-11-21 16:11:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:11:18,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162435854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:18,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:18,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-11-21 16:11:18,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249374637] [2022-11-21 16:11:18,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:18,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 16:11:18,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:18,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 16:11:18,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-11-21 16:11:18,996 INFO L87 Difference]: Start difference. First operand 357 states and 398 transitions. Second operand has 27 states, 26 states have (on average 3.230769230769231) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:19,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:19,695 INFO L93 Difference]: Finished difference Result 437 states and 475 transitions. [2022-11-21 16:11:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 16:11:19,695 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.230769230769231) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-11-21 16:11:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:19,696 INFO L225 Difference]: With dead ends: 437 [2022-11-21 16:11:19,696 INFO L226 Difference]: Without dead ends: 437 [2022-11-21 16:11:19,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2022-11-21 16:11:19,697 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 356 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:19,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 371 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:11:19,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-21 16:11:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 388. [2022-11-21 16:11:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 384 states have (on average 1.1197916666666667) internal successors, (430), 387 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 430 transitions. [2022-11-21 16:11:19,705 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 430 transitions. Word has length 53 [2022-11-21 16:11:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:19,706 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 430 transitions. [2022-11-21 16:11:19,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.230769230769231) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 430 transitions. [2022-11-21 16:11:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 16:11:19,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:19,707 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:19,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-21 16:11:19,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-21 16:11:19,914 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:11:19,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1402960811, now seen corresponding path program 7 times [2022-11-21 16:11:19,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:19,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902429186] [2022-11-21 16:11:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:19,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 45 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:21,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:21,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902429186] [2022-11-21 16:11:21,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902429186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:21,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286680704] [2022-11-21 16:11:21,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:11:21,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:21,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:21,129 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:21,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-21 16:11:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:21,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-21 16:11:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:21,317 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 [2022-11-21 16:11:21,974 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 [2022-11-21 16:11:22,054 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 [2022-11-21 16:11:23,033 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 16:11:23,033 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 [2022-11-21 16:11:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:23,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:23,713 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_979 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_979) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-21 16:11:23,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:11:23,725 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 26 treesize of output 27 [2022-11-21 16:11:23,732 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:11:23,733 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 40 treesize of output 34 [2022-11-21 16:11:24,657 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 [2022-11-21 16:11:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:11:24,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286680704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:24,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:24,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 65 [2022-11-21 16:11:24,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880266113] [2022-11-21 16:11:24,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:24,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-21 16:11:24,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-21 16:11:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3839, Unknown=1, NotChecked=124, Total=4160 [2022-11-21 16:11:24,696 INFO L87 Difference]: Start difference. First operand 388 states and 430 transitions. Second operand has 65 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:11:36,174 INFO L93 Difference]: Finished difference Result 895 states and 961 transitions. [2022-11-21 16:11:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-21 16:11:36,180 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-11-21 16:11:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:11:36,182 INFO L225 Difference]: With dead ends: 895 [2022-11-21 16:11:36,183 INFO L226 Difference]: Without dead ends: 827 [2022-11-21 16:11:36,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 1 IntricatePredicates, 9 DeprecatedPredicates, 3661 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1608, Invalid=14397, Unknown=1, NotChecked=250, Total=16256 [2022-11-21 16:11:36,185 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 751 mSDsluCounter, 2862 mSDsCounter, 0 mSdLazyCounter, 4293 mSolverCounterSat, 26 mSolverCounterUnsat, 37 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 2945 SdHoareTripleChecker+Invalid, 4609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4293 IncrementalHoareTripleChecker+Invalid, 37 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:11:36,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 2945 Invalid, 4609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 4293 Invalid, 37 Unknown, 253 Unchecked, 3.7s Time] [2022-11-21 16:11:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-11-21 16:11:36,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 425. [2022-11-21 16:11:36,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.1140142517814726) internal successors, (469), 424 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 469 transitions. [2022-11-21 16:11:36,196 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 469 transitions. Word has length 56 [2022-11-21 16:11:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:11:36,196 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 469 transitions. [2022-11-21 16:11:36,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 469 transitions. [2022-11-21 16:11:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 16:11:36,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:11:36,198 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:11:36,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-21 16:11:36,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-21 16:11:36,405 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:11:36,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:11:36,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1250411276, now seen corresponding path program 6 times [2022-11-21 16:11:36,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:11:36,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727923950] [2022-11-21 16:11:36,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:11:36,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:11:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:11:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 41 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:11:40,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:11:40,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727923950] [2022-11-21 16:11:40,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727923950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:11:40,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964411273] [2022-11-21 16:11:40,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:11:40,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:11:40,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:11:40,758 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:11:40,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-21 16:11:41,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-21 16:11:41,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:11:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-21 16:11:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:11:41,068 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 [2022-11-21 16:11:41,959 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 17 treesize of output 13 [2022-11-21 16:11:42,085 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 20 treesize of output 22 [2022-11-21 16:11:44,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:11:44,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 31 [2022-11-21 16:11:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 21 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:11:44,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:11:45,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:11:45,125 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 181 treesize of output 97 [2022-11-21 16:11:45,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:11:45,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 186 treesize of output 206 [2022-11-21 16:11:45,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 50 [2022-11-21 16:11:45,668 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-21 16:11:45,689 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 16:11:47,359 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 [2022-11-21 16:11:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 63 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:11:47,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964411273] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:11:47,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:11:47,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 70 [2022-11-21 16:11:47,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366089368] [2022-11-21 16:11:47,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:11:47,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-21 16:11:47,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:11:47,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-21 16:11:47,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=4460, Unknown=7, NotChecked=0, Total=4830 [2022-11-21 16:11:47,417 INFO L87 Difference]: Start difference. First operand 425 states and 469 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 70 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:11:51,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:11:53,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:12:17,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:17,178 INFO L93 Difference]: Finished difference Result 1027 states and 1104 transitions. [2022-11-21 16:12:17,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-21 16:12:17,179 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 70 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-21 16:12:17,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:17,183 INFO L225 Difference]: With dead ends: 1027 [2022-11-21 16:12:17,183 INFO L226 Difference]: Without dead ends: 971 [2022-11-21 16:12:17,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8299 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=3114, Invalid=26291, Unknown=7, NotChecked=0, Total=29412 [2022-11-21 16:12:17,185 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1621 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 4294 mSolverCounterSat, 76 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1621 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 4372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 4294 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:17,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1621 Valid, 1849 Invalid, 4372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 4294 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2022-11-21 16:12:17,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-11-21 16:12:17,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 444. [2022-11-21 16:12:17,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 440 states have (on average 1.115909090909091) internal successors, (491), 443 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 491 transitions. [2022-11-21 16:12:17,197 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 491 transitions. Word has length 58 [2022-11-21 16:12:17,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:17,197 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 491 transitions. [2022-11-21 16:12:17,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 70 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 491 transitions. [2022-11-21 16:12:17,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 16:12:17,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:17,199 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2022-11-21 16:12:17,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-21 16:12:17,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-21 16:12:17,406 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:12:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1533222772, now seen corresponding path program 2 times [2022-11-21 16:12:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:17,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268065946] [2022-11-21 16:12:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:17,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:18,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:18,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268065946] [2022-11-21 16:12:18,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268065946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:18,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202454090] [2022-11-21 16:12:18,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:12:18,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:18,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:18,917 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:18,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-21 16:12:19,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:12:19,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:19,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-21 16:12:19,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:19,265 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 [2022-11-21 16:12:20,191 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 17 treesize of output 13 [2022-11-21 16:12:20,288 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 20 treesize of output 22 [2022-11-21 16:12:20,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:12:20,801 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 21 treesize of output 17 [2022-11-21 16:12:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:21,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:21,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:12:21,933 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 26 treesize of output 27 [2022-11-21 16:12:21,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:12:21,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2022-11-21 16:12:23,339 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 [2022-11-21 16:12:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:23,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202454090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:23,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:23,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 22] total 60 [2022-11-21 16:12:23,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292784798] [2022-11-21 16:12:23,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:23,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-21 16:12:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:23,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-21 16:12:23,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3209, Unknown=1, NotChecked=0, Total=3540 [2022-11-21 16:12:23,449 INFO L87 Difference]: Start difference. First operand 444 states and 491 transitions. Second operand has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 60 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:32,433 INFO L93 Difference]: Finished difference Result 609 states and 660 transitions. [2022-11-21 16:12:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-21 16:12:32,434 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 60 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-21 16:12:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:32,436 INFO L225 Difference]: With dead ends: 609 [2022-11-21 16:12:32,436 INFO L226 Difference]: Without dead ends: 601 [2022-11-21 16:12:32,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1919, Invalid=10290, Unknown=1, NotChecked=0, Total=12210 [2022-11-21 16:12:32,438 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1027 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:32,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 1053 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1959 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-21 16:12:32,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-21 16:12:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 450. [2022-11-21 16:12:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 446 states have (on average 1.1188340807174888) internal successors, (499), 449 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 499 transitions. [2022-11-21 16:12:32,448 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 499 transitions. Word has length 58 [2022-11-21 16:12:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:32,449 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 499 transitions. [2022-11-21 16:12:32,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.6666666666666665) internal successors, (160), 60 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 499 transitions. [2022-11-21 16:12:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-21 16:12:32,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:32,451 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-21 16:12:32,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-21 16:12:32,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:32,658 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:12:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:32,658 INFO L85 PathProgramCache]: Analyzing trace with hash -859796103, now seen corresponding path program 4 times [2022-11-21 16:12:32,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:32,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020056910] [2022-11-21 16:12:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:32,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:12:33,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020056910] [2022-11-21 16:12:33,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020056910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909003663] [2022-11-21 16:12:33,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:12:33,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:33,202 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:33,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-21 16:12:33,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:12:33,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:33,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-21 16:12:33,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:33,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-21 16:12:34,496 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-11-21 16:12:34,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-11-21 16:12:34,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:12:34,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:12:34,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-11-21 16:12:34,919 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 24 treesize of output 24 [2022-11-21 16:12:35,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:12:35,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:12:35,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 14 [2022-11-21 16:12:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:12:35,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:35,350 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1142 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrncat_~d~0#1.base| v_ArrVal_1142) |c_ULTIMATE.start_cstrncat_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrncat_~s~0#1.offset| 1)))) is different from false [2022-11-21 16:12:36,097 INFO L321 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2022-11-21 16:12:36,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 87 [2022-11-21 16:12:36,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:12:36,115 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 49 treesize of output 51 [2022-11-21 16:12:36,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-21 16:12:36,167 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 6 treesize of output 4 [2022-11-21 16:12:36,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:12:36,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 55 [2022-11-21 16:12:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 4 not checked. [2022-11-21 16:12:36,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909003663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:36,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:36,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 20] total 52 [2022-11-21 16:12:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463397131] [2022-11-21 16:12:36,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:36,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-21 16:12:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-21 16:12:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2347, Unknown=25, NotChecked=98, Total=2652 [2022-11-21 16:12:36,873 INFO L87 Difference]: Start difference. First operand 450 states and 499 transitions. Second operand has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:12:49,940 INFO L93 Difference]: Finished difference Result 867 states and 930 transitions. [2022-11-21 16:12:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-11-21 16:12:49,941 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-21 16:12:49,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:12:49,943 INFO L225 Difference]: With dead ends: 867 [2022-11-21 16:12:49,944 INFO L226 Difference]: Without dead ends: 724 [2022-11-21 16:12:49,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6282 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=2565, Invalid=20973, Unknown=28, NotChecked=304, Total=23870 [2022-11-21 16:12:49,945 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1338 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 57 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:12:49,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1338 Valid, 814 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1653 Invalid, 18 Unknown, 155 Unchecked, 1.8s Time] [2022-11-21 16:12:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-11-21 16:12:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 470. [2022-11-21 16:12:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 466 states have (on average 1.113733905579399) internal successors, (519), 469 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 519 transitions. [2022-11-21 16:12:49,955 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 519 transitions. Word has length 59 [2022-11-21 16:12:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:12:49,955 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 519 transitions. [2022-11-21 16:12:49,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.5576923076923075) internal successors, (133), 52 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:12:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 519 transitions. [2022-11-21 16:12:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-21 16:12:49,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:12:49,957 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:12:49,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-21 16:12:50,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:50,163 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:12:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:12:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1518395567, now seen corresponding path program 8 times [2022-11-21 16:12:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:12:50,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726611318] [2022-11-21 16:12:50,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:12:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:12:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:12:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 66 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:51,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:12:51,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726611318] [2022-11-21 16:12:51,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726611318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:12:51,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295416883] [2022-11-21 16:12:51,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:12:51,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:12:51,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:12:51,511 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:12:51,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-21 16:12:51,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:12:51,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:12:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-21 16:12:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:12:51,718 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 [2022-11-21 16:12:52,610 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 [2022-11-21 16:12:52,693 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 [2022-11-21 16:12:53,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:12:53,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:12:53,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-21 16:12:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:53,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:12:54,476 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1197 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1197) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-11-21 16:12:54,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:12:54,484 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 26 treesize of output 27 [2022-11-21 16:12:54,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:12:54,492 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 40 treesize of output 34 [2022-11-21 16:12:54,496 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 [2022-11-21 16:12:55,693 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 [2022-11-21 16:12:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:12:55,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295416883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:12:55,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:12:55,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 26] total 71 [2022-11-21 16:12:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723842087] [2022-11-21 16:12:55,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:12:55,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-21 16:12:55,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:12:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-21 16:12:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4626, Unknown=1, NotChecked=136, Total=4970 [2022-11-21 16:12:55,733 INFO L87 Difference]: Start difference. First operand 470 states and 519 transitions. Second operand has 71 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:09,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:13:09,789 INFO L93 Difference]: Finished difference Result 1052 states and 1129 transitions. [2022-11-21 16:13:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-21 16:13:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2022-11-21 16:13:09,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:13:09,792 INFO L225 Difference]: With dead ends: 1052 [2022-11-21 16:13:09,792 INFO L226 Difference]: Without dead ends: 980 [2022-11-21 16:13:09,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3597 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1873, Invalid=17589, Unknown=2, NotChecked=276, Total=19740 [2022-11-21 16:13:09,795 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 776 mSDsluCounter, 3444 mSDsCounter, 0 mSdLazyCounter, 5380 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 5679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 5380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:13:09,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 3533 Invalid, 5679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 5380 Invalid, 0 Unknown, 271 Unchecked, 4.2s Time] [2022-11-21 16:13:09,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-11-21 16:13:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 507. [2022-11-21 16:13:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 503 states have (on average 1.1093439363817097) internal successors, (558), 506 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 558 transitions. [2022-11-21 16:13:09,807 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 558 transitions. Word has length 62 [2022-11-21 16:13:09,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:13:09,807 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 558 transitions. [2022-11-21 16:13:09,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.464788732394366) internal successors, (175), 71 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:13:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 558 transitions. [2022-11-21 16:13:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-21 16:13:09,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:13:09,809 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:13:09,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-21 16:13:10,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:10,015 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:13:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:13:10,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1312565384, now seen corresponding path program 7 times [2022-11-21 16:13:10,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:13:10,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688868632] [2022-11-21 16:13:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:13:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:13:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 54 proven. 146 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:13:14,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:13:14,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688868632] [2022-11-21 16:13:14,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688868632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:13:14,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87064769] [2022-11-21 16:13:14,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:13:14,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:13:14,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:13:14,202 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:13:14,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-21 16:13:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:13:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-21 16:13:14,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:13:14,497 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 [2022-11-21 16:13:15,538 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 17 treesize of output 13 [2022-11-21 16:13:15,664 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 20 treesize of output 22 [2022-11-21 16:14:29,856 INFO L321 Elim1Store]: treesize reduction 35, result has 56.8 percent of original size [2022-11-21 16:14:29,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 91 treesize of output 80 [2022-11-21 16:14:29,863 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-21 16:14:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 49 proven. 127 refuted. 24 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:14:29,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:14:36,094 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1251 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1251) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= (select .cse0 (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0) (= (select .cse0 (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= 0 (select .cse0 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))) (= (select .cse0 (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (= (select .cse0 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)))) is different from false [2022-11-21 16:14:36,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:14:36,108 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 207 treesize of output 109 [2022-11-21 16:14:36,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:14:36,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 211 treesize of output 235 [2022-11-21 16:14:36,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:14:36,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 57 [2022-11-21 16:14:40,933 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 [2022-11-21 16:14:40,937 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 16:14:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 80 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:14:41,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87064769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:14:41,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:14:41,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 80 [2022-11-21 16:14:41,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222833129] [2022-11-21 16:14:41,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:14:41,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-21 16:14:41,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:14:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-21 16:14:41,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=5592, Unknown=36, NotChecked=154, Total=6320 [2022-11-21 16:14:41,144 INFO L87 Difference]: Start difference. First operand 507 states and 558 transitions. Second operand has 80 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:14:50,982 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 126 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:15:00,845 WARN L233 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 102 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:15:07,557 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 118 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:15:24,521 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 121 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:15:45,285 WARN L233 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 173 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:16:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:16:23,754 INFO L93 Difference]: Finished difference Result 1173 states and 1266 transitions. [2022-11-21 16:16:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-21 16:16:23,755 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 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 64 [2022-11-21 16:16:23,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:16:23,759 INFO L225 Difference]: With dead ends: 1173 [2022-11-21 16:16:23,759 INFO L226 Difference]: Without dead ends: 1131 [2022-11-21 16:16:23,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 8449 ImplicationChecksByTransitivity, 182.0s TimeCoverageRelationStatistics Valid=5973, Invalid=26937, Unknown=36, NotChecked=360, Total=33306 [2022-11-21 16:16:23,761 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1650 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1650 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 2755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-21 16:16:23,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1650 Valid, 1184 Invalid, 2755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2565 Invalid, 0 Unknown, 125 Unchecked, 4.9s Time] [2022-11-21 16:16:23,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-11-21 16:16:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 536. [2022-11-21 16:16:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 532 states have (on average 1.1109022556390977) internal successors, (591), 535 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 591 transitions. [2022-11-21 16:16:23,774 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 591 transitions. Word has length 64 [2022-11-21 16:16:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:16:23,775 INFO L495 AbstractCegarLoop]: Abstraction has 536 states and 591 transitions. [2022-11-21 16:16:23,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:23,775 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 591 transitions. [2022-11-21 16:16:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-21 16:16:23,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:16:23,777 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2022-11-21 16:16:23,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-21 16:16:23,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:23,984 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:16:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:16:23,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1729983568, now seen corresponding path program 3 times [2022-11-21 16:16:23,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:16:23,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796265863] [2022-11-21 16:16:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:16:23,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:16:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:16:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:16:27,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:16:27,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796265863] [2022-11-21 16:16:27,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796265863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:16:27,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893372259] [2022-11-21 16:16:27,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:16:27,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:16:27,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:16:27,765 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:16:27,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-21 16:16:28,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-21 16:16:28,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:16:28,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-21 16:16:28,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:16:28,415 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 [2022-11-21 16:16:28,430 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 [2022-11-21 16:16:30,341 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 22 treesize of output 18 [2022-11-21 16:16:30,515 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 25 treesize of output 27 [2022-11-21 16:16:31,803 INFO L321 Elim1Store]: treesize reduction 4, result has 90.5 percent of original size [2022-11-21 16:16:31,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 48 [2022-11-21 16:16:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:16:33,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:16:37,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:16:37,173 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 51 treesize of output 37 [2022-11-21 16:16:37,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:16:37,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 74 [2022-11-21 16:16:37,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:16:37,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-21 16:16:42,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:16:42,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 16:16:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-21 16:16:42,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893372259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:16:42,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:16:42,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 25] total 81 [2022-11-21 16:16:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107909693] [2022-11-21 16:16:42,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:16:42,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-21 16:16:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:16:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-21 16:16:42,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=6081, Unknown=1, NotChecked=0, Total=6480 [2022-11-21 16:16:42,075 INFO L87 Difference]: Start difference. First operand 536 states and 591 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:16:53,011 WARN L233 SmtUtils]: Spent 10.31s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 16:18:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:18:52,187 INFO L93 Difference]: Finished difference Result 1371 states and 1491 transitions. [2022-11-21 16:18:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-11-21 16:18:52,188 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-11-21 16:18:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:18:52,190 INFO L225 Difference]: With dead ends: 1371 [2022-11-21 16:18:52,190 INFO L226 Difference]: Without dead ends: 1362 [2022-11-21 16:18:52,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24101 ImplicationChecksByTransitivity, 130.6s TimeCoverageRelationStatistics Valid=11642, Invalid=69297, Unknown=1, NotChecked=0, Total=80940 [2022-11-21 16:18:52,194 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2986 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 4579 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2986 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 4904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 4579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:18:52,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2986 Valid, 752 Invalid, 4904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 4579 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-11-21 16:18:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2022-11-21 16:18:52,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 683. [2022-11-21 16:18:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 679 states have (on average 1.1281296023564065) internal successors, (766), 682 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 766 transitions. [2022-11-21 16:18:52,208 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 766 transitions. Word has length 64 [2022-11-21 16:18:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:18:52,208 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 766 transitions. [2022-11-21 16:18:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:18:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 766 transitions. [2022-11-21 16:18:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-21 16:18:52,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:18:52,210 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2022-11-21 16:18:52,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-21 16:18:52,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:52,417 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:18:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:18:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1060022461, now seen corresponding path program 1 times [2022-11-21 16:18:52,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:18:52,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487899556] [2022-11-21 16:18:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:52,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:18:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:18:53,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:18:53,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487899556] [2022-11-21 16:18:53,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487899556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:18:53,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493148383] [2022-11-21 16:18:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:18:53,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:18:53,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:18:53,105 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:18:53,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-21 16:18:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:18:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-21 16:18:53,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:18:53,549 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 [2022-11-21 16:18:54,064 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:18:54,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-21 16:18:54,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-11-21 16:18:54,479 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 16:18:54,479 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 28 treesize of output 34 [2022-11-21 16:18:54,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:18:54,776 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 31 treesize of output 26 [2022-11-21 16:18:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-21 16:18:55,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:18:55,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:18:55,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-21 16:18:56,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:18:56,910 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-21 16:18:56,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:18:56,920 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 16:18:56,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 11 [2022-11-21 16:18:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-21 16:18:57,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493148383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:18:57,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:18:57,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 24] total 63 [2022-11-21 16:18:57,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097809580] [2022-11-21 16:18:57,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:18:57,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-21 16:18:57,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:18:57,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-21 16:18:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3688, Unknown=2, NotChecked=0, Total=3906 [2022-11-21 16:18:57,466 INFO L87 Difference]: Start difference. First operand 683 states and 766 transitions. Second operand has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:13,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 16:19:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:15,387 INFO L93 Difference]: Finished difference Result 1262 states and 1351 transitions. [2022-11-21 16:19:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-11-21 16:19:15,388 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-21 16:19:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:15,391 INFO L225 Difference]: With dead ends: 1262 [2022-11-21 16:19:15,392 INFO L226 Difference]: Without dead ends: 1104 [2022-11-21 16:19:15,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8461 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=2798, Invalid=27300, Unknown=4, NotChecked=0, Total=30102 [2022-11-21 16:19:15,393 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1177 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1177 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 2457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:15,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1177 Valid, 848 Invalid, 2457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2360 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-21 16:19:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-11-21 16:19:15,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 780. [2022-11-21 16:19:15,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 776 states have (on average 1.1275773195876289) internal successors, (875), 779 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 875 transitions. [2022-11-21 16:19:15,406 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 875 transitions. Word has length 65 [2022-11-21 16:19:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:15,406 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 875 transitions. [2022-11-21 16:19:15,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 63 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 875 transitions. [2022-11-21 16:19:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-21 16:19:15,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:15,409 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:15,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-21 16:19:15,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-21 16:19:15,614 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:19:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:15,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1397521677, now seen corresponding path program 9 times [2022-11-21 16:19:15,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:19:15,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642918366] [2022-11-21 16:19:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:15,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:19:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 91 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:17,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:19:17,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642918366] [2022-11-21 16:19:17,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642918366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:17,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892020115] [2022-11-21 16:19:17,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:19:17,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:19:17,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:19:17,226 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:19:17,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-21 16:19:17,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-21 16:19:17,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:19:17,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-21 16:19:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:17,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-21 16:19:18,628 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 [2022-11-21 16:19:18,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-11-21 16:19:19,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 16:19:19,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:19:19,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-21 16:19:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 9 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:19,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:19:20,980 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:19:20,980 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 26 treesize of output 27 [2022-11-21 16:19:20,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:19:20,988 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 40 treesize of output 34 [2022-11-21 16:19:20,992 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 [2022-11-21 16:19:22,387 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 [2022-11-21 16:19:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 9 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:19:22,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892020115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:19:22,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:19:22,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 28] total 77 [2022-11-21 16:19:22,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551325320] [2022-11-21 16:19:22,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:19:22,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-21 16:19:22,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:19:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-21 16:19:22,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=5607, Unknown=13, NotChecked=0, Total=5852 [2022-11-21 16:19:22,428 INFO L87 Difference]: Start difference. First operand 780 states and 875 transitions. Second operand has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 77 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:19:39,285 INFO L93 Difference]: Finished difference Result 1564 states and 1687 transitions. [2022-11-21 16:19:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-21 16:19:39,285 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 77 states have internal predecessors, (193), 0 states have call successors, (0), 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 68 [2022-11-21 16:19:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:19:39,288 INFO L225 Difference]: With dead ends: 1564 [2022-11-21 16:19:39,289 INFO L226 Difference]: Without dead ends: 1488 [2022-11-21 16:19:39,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=2083, Invalid=20856, Unknown=13, NotChecked=0, Total=22952 [2022-11-21 16:19:39,290 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1164 mSDsluCounter, 4611 mSDsCounter, 0 mSdLazyCounter, 6882 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 4707 SdHoareTripleChecker+Invalid, 6912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 6882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:19:39,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 4707 Invalid, 6912 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 6882 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-21 16:19:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-11-21 16:19:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 825. [2022-11-21 16:19:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 821 states have (on average 1.1242387332521315) internal successors, (923), 824 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 923 transitions. [2022-11-21 16:19:39,304 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 923 transitions. Word has length 68 [2022-11-21 16:19:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:19:39,305 INFO L495 AbstractCegarLoop]: Abstraction has 825 states and 923 transitions. [2022-11-21 16:19:39,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.5064935064935066) internal successors, (193), 77 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:19:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 923 transitions. [2022-11-21 16:19:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-21 16:19:39,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:19:39,307 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:19:39,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-21 16:19:39,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-21 16:19:39,514 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-21 16:19:39,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:19:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2038398780, now seen corresponding path program 8 times [2022-11-21 16:19:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:19:39,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407957513] [2022-11-21 16:19:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:19:39,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:19:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:19:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 69 proven. 183 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:19:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:19:43,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407957513] [2022-11-21 16:19:43,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407957513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:19:43,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188109566] [2022-11-21 16:19:43,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:19:43,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:19:43,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:19:43,778 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:19:43,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a429454-c134-4c56-81a4-572569d6b84b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-21 16:19:43,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:19:43,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:19:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-21 16:19:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:19:44,073 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 [2022-11-21 16:19:45,377 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 17 treesize of output 13 [2022-11-21 16:19:45,499 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 20 treesize of output 22 [2022-11-21 16:21:47,326 INFO L321 Elim1Store]: treesize reduction 39, result has 57.1 percent of original size [2022-11-21 16:21:47,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 101 treesize of output 90 [2022-11-21 16:21:47,331 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-21 16:21:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 40 proven. 161 refuted. 51 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:21:47,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:21:54,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:21:54,417 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 233 treesize of output 121 [2022-11-21 16:21:54,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:21:54,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 236 treesize of output 264 [2022-11-21 16:21:54,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 16:21:54,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 98 treesize of output 64