./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:24:38,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:24:38,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:24:38,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:24:38,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:24:38,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:24:38,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:24:38,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:24:38,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:24:38,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:24:38,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:24:38,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:24:38,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:24:38,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:24:38,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:24:38,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:24:38,301 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:24:38,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:24:38,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:24:38,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:24:38,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:24:38,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:24:38,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:24:38,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:24:38,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:24:38,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:24:38,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:24:38,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:24:38,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:24:38,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:24:38,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:24:38,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:24:38,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:24:38,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:24:38,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:24:38,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:24:38,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:24:38,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:24:38,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:24:38,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:24:38,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:24:38,336 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:24:38,363 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:24:38,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:24:38,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:24:38,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:24:38,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:24:38,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:24:38,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:24:38,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:24:38,367 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:24:38,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:24:38,368 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:24:38,369 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:24:38,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:24:38,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:24:38,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:24:38,370 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:24:38,370 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:24:38,371 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:24:38,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:24:38,371 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:24:38,372 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:24:38,372 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:24:38,372 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:24:38,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:24:38,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:24:38,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:24:38,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:24:38,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:24:38,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:24:38,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:24:38,375 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_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2022-11-18 20:24:38,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:24:38,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:24:38,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:24:38,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:24:38,761 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:24:38,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-11-18 20:24:38,874 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/data/210988373/95a0c0c8b1ae4835945560f04c1d0b61/FLAG06006c5c1 [2022-11-18 20:24:39,435 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:24:39,436 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-11-18 20:24:39,442 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/data/210988373/95a0c0c8b1ae4835945560f04c1d0b61/FLAG06006c5c1 [2022-11-18 20:24:39,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/data/210988373/95a0c0c8b1ae4835945560f04c1d0b61 [2022-11-18 20:24:39,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:24:39,800 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:24:39,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:24:39,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:24:39,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:24:39,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:24:39" (1/1) ... [2022-11-18 20:24:39,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ef2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:39, skipping insertion in model container [2022-11-18 20:24:39,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:24:39" (1/1) ... [2022-11-18 20:24:39,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:24:39,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:24:40,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:24:40,054 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:24:40,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:24:40,090 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:24:40,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40 WrapperNode [2022-11-18 20:24:40,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:24:40,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:24:40,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:24:40,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:24:40,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,151 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-11-18 20:24:40,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:24:40,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:24:40,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:24:40,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:24:40,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:24:40,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:24:40,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:24:40,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:24:40,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (1/1) ... [2022-11-18 20:24:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:24:40,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:40,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:24:40,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:24:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:24:40,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:24:40,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:24:40,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:24:40,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:24:40,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:24:40,414 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:24:40,416 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:24:40,624 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:24:40,632 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:24:40,633 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:24:40,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:24:40 BoogieIcfgContainer [2022-11-18 20:24:40,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:24:40,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:24:40,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:24:40,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:24:40,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:24:39" (1/3) ... [2022-11-18 20:24:40,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac49614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:24:40, skipping insertion in model container [2022-11-18 20:24:40,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:24:40" (2/3) ... [2022-11-18 20:24:40,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac49614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:24:40, skipping insertion in model container [2022-11-18 20:24:40,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:24:40" (3/3) ... [2022-11-18 20:24:40,651 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2022-11-18 20:24:40,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:24:40,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-18 20:24:40,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:24:40,757 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;@785c3c08, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:24:40,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-18 20:24:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:24:40,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:40,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:24:40,773 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:40,780 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-11-18 20:24:40,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:40,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737485382] [2022-11-18 20:24:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:40,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:41,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:41,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737485382] [2022-11-18 20:24:41,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737485382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:41,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:41,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:24:41,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083606665] [2022-11-18 20:24:41,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:41,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:24:41,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:24:41,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:24:41,193 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:41,328 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-11-18 20:24:41,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:24:41,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 20:24:41,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:41,342 INFO L225 Difference]: With dead ends: 59 [2022-11-18 20:24:41,348 INFO L226 Difference]: Without dead ends: 55 [2022-11-18 20:24:41,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:24:41,363 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:41,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:41,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-18 20:24:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-11-18 20:24:41,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-18 20:24:41,420 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-11-18 20:24:41,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:41,420 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-18 20:24:41,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-18 20:24:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:24:41,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:41,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:24:41,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:24:41,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:41,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-11-18 20:24:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:41,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771604413] [2022-11-18 20:24:41,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:41,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:41,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:41,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771604413] [2022-11-18 20:24:41,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771604413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:41,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:41,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:24:41,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643434166] [2022-11-18 20:24:41,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:41,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:24:41,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:24:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:24:41,611 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:41,719 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-11-18 20:24:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:24:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-18 20:24:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:41,721 INFO L225 Difference]: With dead ends: 58 [2022-11-18 20:24:41,721 INFO L226 Difference]: Without dead ends: 58 [2022-11-18 20:24:41,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:24:41,724 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:41,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-18 20:24:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-11-18 20:24:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-18 20:24:41,732 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-11-18 20:24:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:41,732 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-18 20:24:41,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-18 20:24:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:24:41,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:41,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:24:41,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:24:41,735 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-11-18 20:24:41,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:41,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909306015] [2022-11-18 20:24:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:41,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:41,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:41,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909306015] [2022-11-18 20:24:41,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909306015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:41,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:41,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:24:41,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627648667] [2022-11-18 20:24:41,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:41,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:24:41,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:41,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:24:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:24:41,986 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:42,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:42,039 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-11-18 20:24:42,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:24:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-18 20:24:42,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:42,041 INFO L225 Difference]: With dead ends: 32 [2022-11-18 20:24:42,041 INFO L226 Difference]: Without dead ends: 32 [2022-11-18 20:24:42,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:24:42,044 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:42,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:24:42,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-18 20:24:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-18 20:24:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-18 20:24:42,050 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-11-18 20:24:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:42,051 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-18 20:24:42,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:42,052 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-18 20:24:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:24:42,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:42,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:24:42,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:24:42,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:42,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:42,055 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-11-18 20:24:42,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:42,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248370631] [2022-11-18 20:24:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:42,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:42,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:42,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248370631] [2022-11-18 20:24:42,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248370631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:42,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:42,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:24:42,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481379599] [2022-11-18 20:24:42,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:42,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:24:42,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:42,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:24:42,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:24:42,217 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:42,332 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-11-18 20:24:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:24:42,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-18 20:24:42,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:42,334 INFO L225 Difference]: With dead ends: 55 [2022-11-18 20:24:42,334 INFO L226 Difference]: Without dead ends: 55 [2022-11-18 20:24:42,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:24:42,340 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:42,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-18 20:24:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-11-18 20:24:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-18 20:24:42,355 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-11-18 20:24:42,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:42,356 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-18 20:24:42,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:42,356 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-18 20:24:42,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:24:42,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:42,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:42,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:24:42,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:42,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-11-18 20:24:42,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:42,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242896234] [2022-11-18 20:24:42,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:42,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:42,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:42,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242896234] [2022-11-18 20:24:42,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242896234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:42,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:42,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:24:42,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567510092] [2022-11-18 20:24:42,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:42,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:24:42,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:42,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:24:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:24:42,450 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:42,537 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-11-18 20:24:42,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:24:42,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:24:42,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:42,539 INFO L225 Difference]: With dead ends: 60 [2022-11-18 20:24:42,539 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 20:24:42,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:24:42,541 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:42,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 20:24:42,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-11-18 20:24:42,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:42,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-18 20:24:42,548 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-11-18 20:24:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:42,548 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-18 20:24:42,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-18 20:24:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:24:42,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:42,550 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:42,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:24:42,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:42,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:42,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-11-18 20:24:42,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:42,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351654425] [2022-11-18 20:24:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:42,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:42,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:42,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351654425] [2022-11-18 20:24:42,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351654425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:42,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959938261] [2022-11-18 20:24:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:42,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:42,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:42,658 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:42,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:24:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:42,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:24:42,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:42,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:42,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959938261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:42,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:42,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-18 20:24:42,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130490090] [2022-11-18 20:24:42,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:42,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:24:42,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:42,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:24:42,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:24:42,930 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2022-11-18 20:24:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:43,094 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-11-18 20:24:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:24:43,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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 10 [2022-11-18 20:24:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:43,105 INFO L225 Difference]: With dead ends: 130 [2022-11-18 20:24:43,105 INFO L226 Difference]: Without dead ends: 130 [2022-11-18 20:24:43,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:24:43,107 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 167 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:43,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 145 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:43,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-18 20:24:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-11-18 20:24:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-11-18 20:24:43,124 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2022-11-18 20:24:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:43,124 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-11-18 20:24:43,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 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) [2022-11-18 20:24:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-11-18 20:24:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:24:43,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:43,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:43,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:24:43,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:24:43,332 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-11-18 20:24:43,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:43,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246751618] [2022-11-18 20:24:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:43,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:43,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:43,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246751618] [2022-11-18 20:24:43,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246751618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:43,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050831427] [2022-11-18 20:24:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:43,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:43,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:43,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:43,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:24:43,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:43,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:24:43,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:43,774 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:24:43,776 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 [2022-11-18 20:24:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:43,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:44,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050831427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:44,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:44,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-18 20:24:44,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335785070] [2022-11-18 20:24:44,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:44,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:24:44,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:24:44,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:24:44,083 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:44,377 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-11-18 20:24:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:24:44,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 20:24:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:44,379 INFO L225 Difference]: With dead ends: 129 [2022-11-18 20:24:44,380 INFO L226 Difference]: Without dead ends: 129 [2022-11-18 20:24:44,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:24:44,381 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 353 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:44,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 99 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:24:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-18 20:24:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2022-11-18 20:24:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-18 20:24:44,389 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-11-18 20:24:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:44,390 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-18 20:24:44,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-18 20:24:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:24:44,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:44,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:44,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:44,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:44,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-11-18 20:24:44,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:44,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662270578] [2022-11-18 20:24:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:44,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:44,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:44,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662270578] [2022-11-18 20:24:44,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662270578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:44,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300824508] [2022-11-18 20:24:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:44,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:44,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:44,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:44,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:24:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:44,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:24:44,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:44,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:44,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300824508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:44,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:44,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-18 20:24:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290140716] [2022-11-18 20:24:44,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:44,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:24:44,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:44,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:24:44,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:24:44,942 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:45,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:45,177 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-11-18 20:24:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:24:45,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 20:24:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:45,181 INFO L225 Difference]: With dead ends: 88 [2022-11-18 20:24:45,182 INFO L226 Difference]: Without dead ends: 88 [2022-11-18 20:24:45,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:24:45,188 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:45,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 52 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-18 20:24:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2022-11-18 20:24:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-11-18 20:24:45,206 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2022-11-18 20:24:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:45,207 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-11-18 20:24:45,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-11-18 20:24:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:24:45,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:45,209 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:45,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:45,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:45,416 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:45,417 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2022-11-18 20:24:45,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:45,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844003962] [2022-11-18 20:24:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:45,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:24:45,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:45,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844003962] [2022-11-18 20:24:45,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844003962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:45,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:45,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:24:45,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231824820] [2022-11-18 20:24:45,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:45,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:24:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:24:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:24:45,605 INFO L87 Difference]: Start difference. First operand 48 states and 53 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) [2022-11-18 20:24:45,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:45,631 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-18 20:24:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:24:45,632 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 17 [2022-11-18 20:24:45,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:45,633 INFO L225 Difference]: With dead ends: 46 [2022-11-18 20:24:45,634 INFO L226 Difference]: Without dead ends: 46 [2022-11-18 20:24:45,634 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 [2022-11-18 20:24:45,637 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:45,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:24:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-18 20:24:45,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-18 20:24:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:45,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-11-18 20:24:45,654 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2022-11-18 20:24:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:45,655 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-11-18 20:24:45,656 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) [2022-11-18 20:24:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-11-18 20:24:45,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:24:45,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:45,657 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:45,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:24:45,658 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2022-11-18 20:24:45,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:45,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704050752] [2022-11-18 20:24:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:45,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:45,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:45,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704050752] [2022-11-18 20:24:45,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704050752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:45,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:24:45,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:24:45,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261226004] [2022-11-18 20:24:45,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:45,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:24:45,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:45,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:24:45,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:24:45,805 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:45,861 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-11-18 20:24:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:24:45,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 20:24:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:45,863 INFO L225 Difference]: With dead ends: 76 [2022-11-18 20:24:45,863 INFO L226 Difference]: Without dead ends: 76 [2022-11-18 20:24:45,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:24:45,864 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:45,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-18 20:24:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-11-18 20:24:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-11-18 20:24:45,870 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2022-11-18 20:24:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:45,871 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-11-18 20:24:45,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-11-18 20:24:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 20:24:45,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:45,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:45,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:24:45,873 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2022-11-18 20:24:45,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:45,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716802675] [2022-11-18 20:24:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:45,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:46,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:46,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716802675] [2022-11-18 20:24:46,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716802675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:46,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113487675] [2022-11-18 20:24:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:46,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:46,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:46,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:46,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:24:46,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:46,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:24:46,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:46,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:46,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-18 20:24:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:46,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113487675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:46,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:46,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-18 20:24:46,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938919734] [2022-11-18 20:24:46,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:46,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:24:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:46,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:24:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:24:46,472 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:46,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:46,620 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-11-18 20:24:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:24:46,621 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 20:24:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:46,622 INFO L225 Difference]: With dead ends: 80 [2022-11-18 20:24:46,622 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 20:24:46,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:24:46,624 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:46,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 41 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 20:24:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-11-18 20:24:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:46,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-11-18 20:24:46,636 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2022-11-18 20:24:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:46,636 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-11-18 20:24:46,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-11-18 20:24:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:24:46,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:46,639 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-11-18 20:24:46,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:46,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:24:46,846 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:46,846 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-11-18 20:24:46,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:46,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875403327] [2022-11-18 20:24:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:46,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:47,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:47,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875403327] [2022-11-18 20:24:47,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875403327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:47,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94081181] [2022-11-18 20:24:47,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:24:47,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:47,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:47,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:47,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:24:47,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:24:47,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:47,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:24:47,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:47,275 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:24:47,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94081181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:47,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:24:47,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-18 20:24:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664670203] [2022-11-18 20:24:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:47,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:24:47,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:24:47,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:24:47,283 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:47,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:47,403 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-11-18 20:24:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:24:47,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 25 [2022-11-18 20:24:47,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:47,405 INFO L225 Difference]: With dead ends: 86 [2022-11-18 20:24:47,405 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 20:24:47,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:24:47,406 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 44 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 [2022-11-18 20:24:47,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 44 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 20:24:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-11-18 20:24:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 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) [2022-11-18 20:24:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-11-18 20:24:47,422 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2022-11-18 20:24:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:47,422 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-11-18 20:24:47,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-11-18 20:24:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 20:24:47,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:47,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:47,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:47,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:47,625 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:47,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:47,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2022-11-18 20:24:47,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:47,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715666960] [2022-11-18 20:24:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:47,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:47,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715666960] [2022-11-18 20:24:47,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715666960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499131748] [2022-11-18 20:24:47,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:47,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:47,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:47,777 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:47,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:24:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:24:47,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:47,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:24:48,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499131748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:48,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:48,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-11-18 20:24:48,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249402051] [2022-11-18 20:24:48,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:48,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:24:48,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:24:48,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:24:48,090 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:48,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:48,428 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2022-11-18 20:24:48,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:24:48,429 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-18 20:24:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:48,430 INFO L225 Difference]: With dead ends: 152 [2022-11-18 20:24:48,430 INFO L226 Difference]: Without dead ends: 152 [2022-11-18 20:24:48,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:24:48,431 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 163 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:48,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 112 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:24:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-18 20:24:48,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2022-11-18 20:24:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.2109375) internal successors, (155), 132 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2022-11-18 20:24:48,436 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 26 [2022-11-18 20:24:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:48,437 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2022-11-18 20:24:48,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2022-11-18 20:24:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 20:24:48,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:48,438 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:48,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:48,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:24:48,646 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:48,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2022-11-18 20:24:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:48,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054239465] [2022-11-18 20:24:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:48,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:48,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:48,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054239465] [2022-11-18 20:24:48,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054239465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:48,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874287251] [2022-11-18 20:24:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:48,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:48,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:48,866 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:48,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:24:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:24:48,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:49,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:49,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874287251] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:49,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:49,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-11-18 20:24:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327336868] [2022-11-18 20:24:49,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:49,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:24:49,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:24:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:24:49,278 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2022-11-18 20:24:49,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:49,596 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2022-11-18 20:24:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:24:49,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 34 [2022-11-18 20:24:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:49,597 INFO L225 Difference]: With dead ends: 136 [2022-11-18 20:24:49,597 INFO L226 Difference]: Without dead ends: 136 [2022-11-18 20:24:49,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:24:49,598 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:49,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 75 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:24:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-18 20:24:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2022-11-18 20:24:49,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.1875) internal successors, (152), 132 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) [2022-11-18 20:24:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2022-11-18 20:24:49,603 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 34 [2022-11-18 20:24:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:49,604 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2022-11-18 20:24:49,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2022-11-18 20:24:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2022-11-18 20:24:49,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:24:49,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:49,605 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:49,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:49,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:49,812 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:49,813 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2022-11-18 20:24:49,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:49,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357732005] [2022-11-18 20:24:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:49,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:24:50,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:50,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357732005] [2022-11-18 20:24:50,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357732005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:50,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883092500] [2022-11-18 20:24:50,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:24:50,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:50,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:50,239 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:50,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:24:50,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:24:50,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:50,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:24:50,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:50,384 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:24:50,385 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 [2022-11-18 20:24:50,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:24:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:24:50,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:24:51,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883092500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:51,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:51,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 10 [2022-11-18 20:24:51,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297340996] [2022-11-18 20:24:51,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:51,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:24:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:51,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:24:51,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:24:51,143 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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) [2022-11-18 20:24:51,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:51,298 INFO L93 Difference]: Finished difference Result 165 states and 180 transitions. [2022-11-18 20:24:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:24:51,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-18 20:24:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:51,300 INFO L225 Difference]: With dead ends: 165 [2022-11-18 20:24:51,301 INFO L226 Difference]: Without dead ends: 165 [2022-11-18 20:24:51,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:24:51,302 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 61 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:51,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 84 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:24:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-18 20:24:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 159. [2022-11-18 20:24:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.1688311688311688) internal successors, (180), 158 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:51,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2022-11-18 20:24:51,309 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 39 [2022-11-18 20:24:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:51,310 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2022-11-18 20:24:51,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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) [2022-11-18 20:24:51,311 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2022-11-18 20:24:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 20:24:51,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:51,312 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:51,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:51,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:24:51,520 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:51,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:51,521 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2022-11-18 20:24:51,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:51,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443824967] [2022-11-18 20:24:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:51,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:24:51,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:51,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443824967] [2022-11-18 20:24:51,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443824967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:51,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936554793] [2022-11-18 20:24:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:51,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:51,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:51,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:51,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:24:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:51,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:24:51,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:24:52,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:24:52,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936554793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:52,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:52,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 16 [2022-11-18 20:24:52,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077000278] [2022-11-18 20:24:52,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:52,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:24:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:52,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:24:52,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:24:52,344 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:52,672 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2022-11-18 20:24:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:24:52,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-18 20:24:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:52,674 INFO L225 Difference]: With dead ends: 159 [2022-11-18 20:24:52,674 INFO L226 Difference]: Without dead ends: 159 [2022-11-18 20:24:52,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:24:52,675 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 171 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:52,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 93 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:24:52,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-18 20:24:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2022-11-18 20:24:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1496598639455782) internal successors, (169), 151 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2022-11-18 20:24:52,680 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 42 [2022-11-18 20:24:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:52,680 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2022-11-18 20:24:52,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2022-11-18 20:24:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:24:52,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:52,682 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-18 20:24:52,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:52,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:24:52,889 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:52,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:52,889 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2022-11-18 20:24:52,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:52,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480639726] [2022-11-18 20:24:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:52,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:24:53,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:53,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480639726] [2022-11-18 20:24:53,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480639726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:53,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558607727] [2022-11-18 20:24:53,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:24:53,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:53,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:53,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:53,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:24:53,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:24:53,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:53,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:24:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:24:53,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:24:54,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558607727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:54,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:54,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2022-11-18 20:24:54,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838504518] [2022-11-18 20:24:54,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:54,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:24:54,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:54,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:24:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:24:54,020 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:55,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:55,005 INFO L93 Difference]: Finished difference Result 312 states and 328 transitions. [2022-11-18 20:24:55,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:24:55,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 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 [2022-11-18 20:24:55,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:55,008 INFO L225 Difference]: With dead ends: 312 [2022-11-18 20:24:55,008 INFO L226 Difference]: Without dead ends: 312 [2022-11-18 20:24:55,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=425, Invalid=1381, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:24:55,010 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 618 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:55,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 150 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:24:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-18 20:24:55,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 207. [2022-11-18 20:24:55,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.113861386138614) internal successors, (225), 206 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 225 transitions. [2022-11-18 20:24:55,017 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 225 transitions. Word has length 64 [2022-11-18 20:24:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:55,018 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 225 transitions. [2022-11-18 20:24:55,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 225 transitions. [2022-11-18 20:24:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-18 20:24:55,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:55,020 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-11-18 20:24:55,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:55,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:24:55,227 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:55,227 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2022-11-18 20:24:55,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:55,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340625016] [2022-11-18 20:24:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:55,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:55,563 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-18 20:24:55,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340625016] [2022-11-18 20:24:55,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340625016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:55,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373615765] [2022-11-18 20:24:55,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:24:55,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:55,566 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:55,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:24:55,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:24:55,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:24:55,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-18 20:24:55,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-18 20:24:55,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373615765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:24:55,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:24:55,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 20:24:55,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369082166] [2022-11-18 20:24:55,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:55,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:24:55,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:24:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:24:55,982 INFO L87 Difference]: Start difference. First operand 207 states and 225 transitions. Second operand has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:56,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:56,570 INFO L93 Difference]: Finished difference Result 492 states and 574 transitions. [2022-11-18 20:24:56,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:24:56,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 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 91 [2022-11-18 20:24:56,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:56,574 INFO L225 Difference]: With dead ends: 492 [2022-11-18 20:24:56,574 INFO L226 Difference]: Without dead ends: 492 [2022-11-18 20:24:56,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:24:56,575 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 468 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:56,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 309 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:24:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-18 20:24:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 265. [2022-11-18 20:24:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.1730769230769231) internal successors, (305), 264 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:56,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 305 transitions. [2022-11-18 20:24:56,585 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 305 transitions. Word has length 91 [2022-11-18 20:24:56,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:56,585 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 305 transitions. [2022-11-18 20:24:56,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 305 transitions. [2022-11-18 20:24:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-18 20:24:56,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:56,587 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:24:56,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:56,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:24:56,794 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:56,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1874012467, now seen corresponding path program 2 times [2022-11-18 20:24:56,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:56,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950788696] [2022-11-18 20:24:56,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:56,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 256 proven. 77 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 20:24:57,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:57,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950788696] [2022-11-18 20:24:57,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950788696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:57,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786726580] [2022-11-18 20:24:57,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:24:57,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:57,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:57,303 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:57,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:24:57,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:24:57,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:24:57,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:24:57,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:58,567 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_350 Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_16| Int) (v_ArrVal_349 Int) (v_ArrVal_348 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_21| Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21| v_ArrVal_350) |v_ULTIMATE.start_main_~#mask~0#1.base_16| v_ArrVal_349) |v_ULTIMATE.start_main_~#b~0#1.base_21| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_16| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21| v_ArrVal_348) |v_ULTIMATE.start_main_~#mask~0#1.base_16|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_21|) 0))) is different from true [2022-11-18 20:24:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 365 trivial. 0 not checked. [2022-11-18 20:24:58,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:24:58,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786726580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:24:58,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:24:58,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2022-11-18 20:24:58,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459175370] [2022-11-18 20:24:58,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:24:58,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:24:58,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:58,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:24:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-11-18 20:24:58,574 INFO L87 Difference]: Start difference. First operand 265 states and 305 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-11-18 20:24:58,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:24:58,576 INFO L93 Difference]: Finished difference Result 266 states and 305 transitions. [2022-11-18 20:24:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:24:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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 92 [2022-11-18 20:24:58,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:24:58,578 INFO L225 Difference]: With dead ends: 266 [2022-11-18 20:24:58,578 INFO L226 Difference]: Without dead ends: 264 [2022-11-18 20:24:58,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-11-18 20:24:58,580 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:24:58,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 21 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-11-18 20:24:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-18 20:24:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-11-18 20:24:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.1583011583011582) internal successors, (300), 263 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:24:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 300 transitions. [2022-11-18 20:24:58,588 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 300 transitions. Word has length 92 [2022-11-18 20:24:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:24:58,588 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 300 transitions. [2022-11-18 20:24:58,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 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) [2022-11-18 20:24:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 300 transitions. [2022-11-18 20:24:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-18 20:24:58,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:24:58,590 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-11-18 20:24:58,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:24:58,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:58,797 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:24:58,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:24:58,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2022-11-18 20:24:58,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:24:58,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981317052] [2022-11-18 20:24:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:58,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:24:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-18 20:24:59,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:24:59,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981317052] [2022-11-18 20:24:59,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981317052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:59,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071033954] [2022-11-18 20:24:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:24:59,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:24:59,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:24:59,445 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:24:59,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:24:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:24:59,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:24:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:24:59,630 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:24:59,631 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 [2022-11-18 20:25:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-18 20:25:00,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-18 20:25:00,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071033954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:00,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:00,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-18 20:25:00,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780445151] [2022-11-18 20:25:00,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:00,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:25:00,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:00,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:25:00,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:25:00,853 INFO L87 Difference]: Start difference. First operand 264 states and 300 transitions. Second operand has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:01,697 INFO L93 Difference]: Finished difference Result 481 states and 526 transitions. [2022-11-18 20:25:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:25:01,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-18 20:25:01,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:01,701 INFO L225 Difference]: With dead ends: 481 [2022-11-18 20:25:01,701 INFO L226 Difference]: Without dead ends: 481 [2022-11-18 20:25:01,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:25:01,703 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 466 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:01,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 215 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:25:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-18 20:25:01,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 266. [2022-11-18 20:25:01,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.1187739463601531) internal successors, (292), 265 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 292 transitions. [2022-11-18 20:25:01,714 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 292 transitions. Word has length 92 [2022-11-18 20:25:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:01,714 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 292 transitions. [2022-11-18 20:25:01,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 292 transitions. [2022-11-18 20:25:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-18 20:25:01,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:01,716 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:01,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:01,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:01,923 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2035033164, now seen corresponding path program 1 times [2022-11-18 20:25:01,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:01,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466239789] [2022-11-18 20:25:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:01,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 256 proven. 77 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:25:02,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:02,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466239789] [2022-11-18 20:25:02,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466239789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:02,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896209264] [2022-11-18 20:25:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:02,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:02,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:02,523 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:02,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:25:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:02,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:25:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 210 proven. 106 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:25:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 210 proven. 106 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:25:03,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896209264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:03,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:03,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 21 [2022-11-18 20:25:03,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847065539] [2022-11-18 20:25:03,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:03,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:25:03,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:03,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:25:03,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:25:03,174 INFO L87 Difference]: Start difference. First operand 266 states and 292 transitions. Second operand has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:03,954 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2022-11-18 20:25:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:25:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-11-18 20:25:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:03,956 INFO L225 Difference]: With dead ends: 210 [2022-11-18 20:25:03,956 INFO L226 Difference]: Without dead ends: 210 [2022-11-18 20:25:03,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:25:03,958 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:03,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 86 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:25:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-18 20:25:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2022-11-18 20:25:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1176470588235294) internal successors, (228), 208 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2022-11-18 20:25:03,965 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 93 [2022-11-18 20:25:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:03,965 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2022-11-18 20:25:03,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:03,966 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2022-11-18 20:25:03,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 20:25:03,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:03,967 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:03,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:04,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:04,174 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:04,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1008958684, now seen corresponding path program 2 times [2022-11-18 20:25:04,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:04,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252364738] [2022-11-18 20:25:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:04,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 279 proven. 140 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-18 20:25:04,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252364738] [2022-11-18 20:25:04,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252364738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385643479] [2022-11-18 20:25:04,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:25:04,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:04,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:04,781 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:04,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:25:04,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:25:04,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:04,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:25:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-18 20:25:05,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 191 proven. 238 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-18 20:25:05,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385643479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:05,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:05,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2022-11-18 20:25:05,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803904006] [2022-11-18 20:25:05,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:05,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:25:05,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:25:05,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:25:05,699 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:06,886 INFO L93 Difference]: Finished difference Result 211 states and 226 transitions. [2022-11-18 20:25:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:25:06,887 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2022-11-18 20:25:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:06,889 INFO L225 Difference]: With dead ends: 211 [2022-11-18 20:25:06,889 INFO L226 Difference]: Without dead ends: 211 [2022-11-18 20:25:06,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 192 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=396, Invalid=1496, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 20:25:06,891 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:06,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 86 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:25:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-18 20:25:06,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2022-11-18 20:25:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.107843137254902) internal successors, (226), 208 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:06,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 226 transitions. [2022-11-18 20:25:06,898 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 226 transitions. Word has length 103 [2022-11-18 20:25:06,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:06,898 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 226 transitions. [2022-11-18 20:25:06,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.8076923076923075) internal successors, (151), 26 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 226 transitions. [2022-11-18 20:25:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-18 20:25:06,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:06,901 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:06,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:07,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:07,109 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1018520203, now seen corresponding path program 3 times [2022-11-18 20:25:07,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:07,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621041266] [2022-11-18 20:25:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:07,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 293 proven. 142 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-18 20:25:07,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:07,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621041266] [2022-11-18 20:25:07,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621041266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:07,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410213123] [2022-11-18 20:25:07,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:25:07,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:07,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:07,678 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:07,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:25:07,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:25:07,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:07,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:25:07,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:07,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:07,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-18 20:25:07,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:25:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2022-11-18 20:25:08,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2022-11-18 20:25:09,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410213123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:09,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:09,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 4] total 18 [2022-11-18 20:25:09,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391805412] [2022-11-18 20:25:09,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:09,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:25:09,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:09,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:25:09,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:25:09,168 INFO L87 Difference]: Start difference. First operand 209 states and 226 transitions. Second operand has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 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) [2022-11-18 20:25:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:10,764 INFO L93 Difference]: Finished difference Result 279 states and 300 transitions. [2022-11-18 20:25:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 20:25:10,765 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 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 108 [2022-11-18 20:25:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:10,766 INFO L225 Difference]: With dead ends: 279 [2022-11-18 20:25:10,767 INFO L226 Difference]: Without dead ends: 279 [2022-11-18 20:25:10,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=454, Invalid=1616, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:25:10,768 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 451 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:10,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 65 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:25:10,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-11-18 20:25:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 273. [2022-11-18 20:25:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.1119402985074627) internal successors, (298), 272 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 298 transitions. [2022-11-18 20:25:10,777 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 298 transitions. Word has length 108 [2022-11-18 20:25:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:10,778 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 298 transitions. [2022-11-18 20:25:10,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.722222222222222) internal successors, (103), 19 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) [2022-11-18 20:25:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 298 transitions. [2022-11-18 20:25:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-18 20:25:10,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:10,780 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:10,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:10,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 20:25:10,986 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1286679423, now seen corresponding path program 1 times [2022-11-18 20:25:10,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:10,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902722735] [2022-11-18 20:25:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:10,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2022-11-18 20:25:11,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902722735] [2022-11-18 20:25:11,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902722735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:11,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948096000] [2022-11-18 20:25:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:11,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:11,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:11,321 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:11,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:25:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:11,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:25:11,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 498 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-18 20:25:12,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 17 proven. 481 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-18 20:25:12,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948096000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:12,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:12,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 23 [2022-11-18 20:25:12,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992034767] [2022-11-18 20:25:12,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:12,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:25:12,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:25:12,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:25:12,711 INFO L87 Difference]: Start difference. First operand 273 states and 298 transitions. Second operand has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 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) [2022-11-18 20:25:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:14,041 INFO L93 Difference]: Finished difference Result 551 states and 594 transitions. [2022-11-18 20:25:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:25:14,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 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) Word has length 121 [2022-11-18 20:25:14,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:14,045 INFO L225 Difference]: With dead ends: 551 [2022-11-18 20:25:14,045 INFO L226 Difference]: Without dead ends: 551 [2022-11-18 20:25:14,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:25:14,046 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 679 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:14,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 342 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:25:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-18 20:25:14,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 531. [2022-11-18 20:25:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 526 states have (on average 1.129277566539924) internal successors, (594), 530 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 594 transitions. [2022-11-18 20:25:14,060 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 594 transitions. Word has length 121 [2022-11-18 20:25:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:14,061 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 594 transitions. [2022-11-18 20:25:14,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.869565217391305) internal successors, (181), 23 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) [2022-11-18 20:25:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 594 transitions. [2022-11-18 20:25:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-18 20:25:14,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:14,063 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-11-18 20:25:14,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:14,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 20:25:14,271 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2022-11-18 20:25:14,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:14,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875979126] [2022-11-18 20:25:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:14,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 613 proven. 295 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 20:25:15,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:15,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875979126] [2022-11-18 20:25:15,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875979126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:15,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751935248] [2022-11-18 20:25:15,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:25:15,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:15,074 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:15,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:25:15,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:25:15,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:25:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-18 20:25:15,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-18 20:25:16,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751935248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:16,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:16,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 43 [2022-11-18 20:25:16,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26274438] [2022-11-18 20:25:16,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:16,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:25:16,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:25:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1382, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:25:16,535 INFO L87 Difference]: Start difference. First operand 531 states and 594 transitions. Second operand has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:19,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:19,158 INFO L93 Difference]: Finished difference Result 472 states and 503 transitions. [2022-11-18 20:25:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-18 20:25:19,159 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-11-18 20:25:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:19,162 INFO L225 Difference]: With dead ends: 472 [2022-11-18 20:25:19,162 INFO L226 Difference]: Without dead ends: 472 [2022-11-18 20:25:19,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 218 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2307, Invalid=9035, Unknown=0, NotChecked=0, Total=11342 [2022-11-18 20:25:19,166 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 984 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:19,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 131 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:25:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-18 20:25:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 466. [2022-11-18 20:25:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 461 states have (on average 1.0911062906724511) internal successors, (503), 465 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 503 transitions. [2022-11-18 20:25:19,177 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 503 transitions. Word has length 121 [2022-11-18 20:25:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:19,178 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 503 transitions. [2022-11-18 20:25:19,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.744186046511628) internal successors, (247), 43 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 503 transitions. [2022-11-18 20:25:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-18 20:25:19,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:19,180 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1] [2022-11-18 20:25:19,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-18 20:25:19,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:19,386 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:19,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1239811749, now seen corresponding path program 3 times [2022-11-18 20:25:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:19,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280387133] [2022-11-18 20:25:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:19,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1112 proven. 218 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-11-18 20:25:20,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280387133] [2022-11-18 20:25:20,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280387133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:20,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982570658] [2022-11-18 20:25:20,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:25:20,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:20,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:20,103 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:20,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:25:20,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:25:20,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:20,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:25:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:20,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:20,275 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:25:20,276 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 20:25:20,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:25:22,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 13 proven. 552 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2022-11-18 20:25:22,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 565 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2022-11-18 20:25:24,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982570658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:24,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:24,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 30 [2022-11-18 20:25:24,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147834674] [2022-11-18 20:25:24,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:24,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:25:24,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:24,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:25:24,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:25:24,185 INFO L87 Difference]: Start difference. First operand 466 states and 503 transitions. Second operand has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:27,517 INFO L93 Difference]: Finished difference Result 465 states and 492 transitions. [2022-11-18 20:25:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:25:27,518 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2022-11-18 20:25:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:27,520 INFO L225 Difference]: With dead ends: 465 [2022-11-18 20:25:27,520 INFO L226 Difference]: Without dead ends: 465 [2022-11-18 20:25:27,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 328 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=981, Invalid=3849, Unknown=0, NotChecked=0, Total=4830 [2022-11-18 20:25:27,522 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:27,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 120 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 529 Invalid, 0 Unknown, 182 Unchecked, 0.4s Time] [2022-11-18 20:25:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-18 20:25:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2022-11-18 20:25:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.0672451193058567) internal successors, (492), 464 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 492 transitions. [2022-11-18 20:25:27,534 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 492 transitions. Word has length 162 [2022-11-18 20:25:27,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:27,535 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 492 transitions. [2022-11-18 20:25:27,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.8) internal successors, (144), 30 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 492 transitions. [2022-11-18 20:25:27,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-11-18 20:25:27,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:27,541 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-18 20:25:27,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:27,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:25:27,747 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:27,748 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 5 times [2022-11-18 20:25:27,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283407100] [2022-11-18 20:25:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:27,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4200 proven. 311 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2022-11-18 20:25:28,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:28,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283407100] [2022-11-18 20:25:28,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283407100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:28,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383146236] [2022-11-18 20:25:28,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:25:28,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:28,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:28,999 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:29,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:25:29,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:25:29,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:29,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:25:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4038 proven. 852 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2022-11-18 20:25:30,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4223 proven. 667 refuted. 0 times theorem prover too weak. 1442 trivial. 0 not checked. [2022-11-18 20:25:30,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383146236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:30,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:30,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 41 [2022-11-18 20:25:30,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522515805] [2022-11-18 20:25:30,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:30,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:25:30,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:30,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:25:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:25:30,909 INFO L87 Difference]: Start difference. First operand 465 states and 492 transitions. Second operand has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:32,657 INFO L93 Difference]: Finished difference Result 465 states and 487 transitions. [2022-11-18 20:25:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 20:25:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 0 states have call successors, (0), 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 301 [2022-11-18 20:25:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:32,660 INFO L225 Difference]: With dead ends: 465 [2022-11-18 20:25:32,660 INFO L226 Difference]: Without dead ends: 465 [2022-11-18 20:25:32,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 576 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1138, Invalid=4412, Unknown=0, NotChecked=0, Total=5550 [2022-11-18 20:25:32,662 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 156 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:32,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 163 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:25:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-18 20:25:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2022-11-18 20:25:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 461 states have (on average 1.0563991323210413) internal successors, (487), 464 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 487 transitions. [2022-11-18 20:25:32,674 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 487 transitions. Word has length 301 [2022-11-18 20:25:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:32,675 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 487 transitions. [2022-11-18 20:25:32,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.487804878048781) internal successors, (225), 41 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 487 transitions. [2022-11-18 20:25:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-11-18 20:25:32,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:32,682 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-18 20:25:32,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:32,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:25:32,890 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:32,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:32,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 6 times [2022-11-18 20:25:32,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:32,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837985446] [2022-11-18 20:25:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:32,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4815 proven. 419 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2022-11-18 20:25:34,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:34,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837985446] [2022-11-18 20:25:34,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837985446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:34,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552943610] [2022-11-18 20:25:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:25:34,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:34,191 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:34,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:25:36,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-11-18 20:25:36,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:25:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-11-18 20:25:37,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 5041 proven. 1392 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-11-18 20:25:38,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552943610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:38,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:38,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 43 [2022-11-18 20:25:38,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788378218] [2022-11-18 20:25:38,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:38,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:25:38,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:38,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:25:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:25:38,389 INFO L87 Difference]: Start difference. First operand 465 states and 487 transitions. Second operand has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:41,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:41,575 INFO L93 Difference]: Finished difference Result 571 states and 584 transitions. [2022-11-18 20:25:41,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-18 20:25:41,575 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 states have internal predecessors, (273), 0 states have call successors, (0), 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 316 [2022-11-18 20:25:41,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:41,578 INFO L225 Difference]: With dead ends: 571 [2022-11-18 20:25:41,578 INFO L226 Difference]: Without dead ends: 571 [2022-11-18 20:25:41,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 603 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1716, Invalid=7026, Unknown=0, NotChecked=0, Total=8742 [2022-11-18 20:25:41,581 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 3145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:41,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 237 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3145 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 20:25:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-18 20:25:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 559. [2022-11-18 20:25:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 555 states have (on average 1.0342342342342343) internal successors, (574), 558 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:41,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 574 transitions. [2022-11-18 20:25:41,592 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 574 transitions. Word has length 316 [2022-11-18 20:25:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:41,593 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 574 transitions. [2022-11-18 20:25:41,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.348837209302325) internal successors, (273), 43 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:41,593 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 574 transitions. [2022-11-18 20:25:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-11-18 20:25:41,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:41,599 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-11-18 20:25:41,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:41,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:25:41,809 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:41,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 7 times [2022-11-18 20:25:41,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:41,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771619131] [2022-11-18 20:25:41,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:41,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 3828 proven. 705 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2022-11-18 20:25:43,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:43,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771619131] [2022-11-18 20:25:43,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771619131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:43,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568058346] [2022-11-18 20:25:43,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:25:43,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:43,347 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:43,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:25:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:43,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:25:43,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-11-18 20:25:44,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 289 proven. 6974 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-11-18 20:25:45,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568058346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:45,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:45,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 44 [2022-11-18 20:25:45,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857916585] [2022-11-18 20:25:45,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:45,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-18 20:25:45,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-18 20:25:45,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1548, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 20:25:45,431 INFO L87 Difference]: Start difference. First operand 559 states and 574 transitions. Second operand has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:48,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:48,808 INFO L93 Difference]: Finished difference Result 625 states and 633 transitions. [2022-11-18 20:25:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-18 20:25:48,809 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 331 [2022-11-18 20:25:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:48,812 INFO L225 Difference]: With dead ends: 625 [2022-11-18 20:25:48,812 INFO L226 Difference]: Without dead ends: 625 [2022-11-18 20:25:48,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 627 SyntacticMatches, 19 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6732 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3388, Invalid=16634, Unknown=0, NotChecked=0, Total=20022 [2022-11-18 20:25:48,819 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1493 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:48,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1493 Valid, 221 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:25:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-18 20:25:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 506. [2022-11-18 20:25:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 502 states have (on average 1.0278884462151394) internal successors, (516), 505 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:48,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 516 transitions. [2022-11-18 20:25:48,830 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 516 transitions. Word has length 331 [2022-11-18 20:25:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:48,831 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 516 transitions. [2022-11-18 20:25:48,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.113636363636363) internal successors, (269), 44 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:48,832 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 516 transitions. [2022-11-18 20:25:48,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2022-11-18 20:25:48,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:48,838 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-18 20:25:48,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:49,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:49,046 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:49,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:49,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1903304557, now seen corresponding path program 8 times [2022-11-18 20:25:49,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:49,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152995375] [2022-11-18 20:25:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:49,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-11-18 20:25:49,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152995375] [2022-11-18 20:25:49,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152995375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116761481] [2022-11-18 20:25:49,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:25:49,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:49,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:49,887 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:49,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:25:50,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:25:50,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:50,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:25:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-11-18 20:25:50,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:25:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11054 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-11-18 20:25:50,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116761481] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:25:50,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:25:50,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-18 20:25:50,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047423195] [2022-11-18 20:25:50,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:25:50,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:25:50,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:25:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:25:50,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:25:50,984 INFO L87 Difference]: Start difference. First operand 506 states and 516 transitions. Second operand has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:55,403 INFO L93 Difference]: Finished difference Result 1246 states and 1332 transitions. [2022-11-18 20:25:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:25:55,406 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 388 [2022-11-18 20:25:55,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:55,411 INFO L225 Difference]: With dead ends: 1246 [2022-11-18 20:25:55,411 INFO L226 Difference]: Without dead ends: 1246 [2022-11-18 20:25:55,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 772 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=440, Invalid=750, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:25:55,413 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1637 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1637 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:55,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1637 Valid, 827 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:25:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-11-18 20:25:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 565. [2022-11-18 20:25:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 561 states have (on average 1.0659536541889483) internal successors, (598), 564 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 598 transitions. [2022-11-18 20:25:55,426 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 598 transitions. Word has length 388 [2022-11-18 20:25:55,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:55,427 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 598 transitions. [2022-11-18 20:25:55,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.125) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:25:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 598 transitions. [2022-11-18 20:25:55,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-18 20:25:55,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:55,430 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 64, 64, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-18 20:25:55,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:55,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:55,637 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:25:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:55,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1127100931, now seen corresponding path program 2 times [2022-11-18 20:25:55,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:55,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38844709] [2022-11-18 20:25:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:55,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-11-18 20:25:57,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:57,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38844709] [2022-11-18 20:25:57,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38844709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:57,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428162994] [2022-11-18 20:25:57,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:25:57,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:57,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:57,138 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:57,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:25:57,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:25:57,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 20:25:57,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:57,496 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:25:57,497 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 [2022-11-18 20:25:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-11-18 20:25:59,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11118 backedges. 0 proven. 3216 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-11-18 20:26:01,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428162994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:01,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:01,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-11-18 20:26:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213218118] [2022-11-18 20:26:01,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:01,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:26:01,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:26:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:26:01,444 INFO L87 Difference]: Start difference. First operand 565 states and 598 transitions. Second operand has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:04,424 INFO L93 Difference]: Finished difference Result 1236 states and 1322 transitions. [2022-11-18 20:26:04,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:26:04,424 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 0 states have call successors, (0), 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 389 [2022-11-18 20:26:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:04,428 INFO L225 Difference]: With dead ends: 1236 [2022-11-18 20:26:04,429 INFO L226 Difference]: Without dead ends: 1236 [2022-11-18 20:26:04,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 755 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1288, Invalid=3268, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 20:26:04,430 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1818 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1818 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:04,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1818 Valid, 831 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1861 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 20:26:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-11-18 20:26:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 566. [2022-11-18 20:26:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 562 states have (on average 1.0462633451957295) internal successors, (588), 565 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 588 transitions. [2022-11-18 20:26:04,442 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 588 transitions. Word has length 389 [2022-11-18 20:26:04,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:04,443 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 588 transitions. [2022-11-18 20:26:04,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.257142857142857) internal successors, (184), 36 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 588 transitions. [2022-11-18 20:26:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-11-18 20:26:04,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:04,446 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 62, 10, 10, 10, 10, 10, 10, 10, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-18 20:26:04,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:04,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:04,653 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:26:04,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash -788499985, now seen corresponding path program 4 times [2022-11-18 20:26:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:04,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586403481] [2022-11-18 20:26:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:04,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 6654 proven. 1334 refuted. 0 times theorem prover too weak. 2462 trivial. 0 not checked. [2022-11-18 20:26:06,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:06,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586403481] [2022-11-18 20:26:06,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586403481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:06,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245989590] [2022-11-18 20:26:06,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:26:06,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:06,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:06,505 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:06,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:26:07,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:26:07,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:07,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:26:07,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 9350 proven. 78 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2022-11-18 20:26:08,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:08,664 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 9 treesize of output 7 [2022-11-18 20:26:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10450 backedges. 9350 proven. 78 refuted. 0 times theorem prover too weak. 1022 trivial. 0 not checked. [2022-11-18 20:26:09,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245989590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:09,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:09,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 52 [2022-11-18 20:26:09,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374624365] [2022-11-18 20:26:09,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:09,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 20:26:09,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 20:26:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2296, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 20:26:09,415 INFO L87 Difference]: Start difference. First operand 566 states and 588 transitions. Second operand has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:15,980 INFO L93 Difference]: Finished difference Result 622 states and 649 transitions. [2022-11-18 20:26:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-18 20:26:15,980 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 406 [2022-11-18 20:26:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:15,983 INFO L225 Difference]: With dead ends: 622 [2022-11-18 20:26:15,983 INFO L226 Difference]: Without dead ends: 622 [2022-11-18 20:26:15,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 792 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6574 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3084, Invalid=18968, Unknown=0, NotChecked=0, Total=22052 [2022-11-18 20:26:15,986 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2623 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 4923 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2623 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 5126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 4923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:15,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2623 Valid, 272 Invalid, 5126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 4923 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-18 20:26:15,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-11-18 20:26:15,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 504. [2022-11-18 20:26:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.036) internal successors, (518), 503 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 518 transitions. [2022-11-18 20:26:15,994 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 518 transitions. Word has length 406 [2022-11-18 20:26:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:15,995 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 518 transitions. [2022-11-18 20:26:15,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.730769230769231) internal successors, (350), 52 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 518 transitions. [2022-11-18 20:26:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-11-18 20:26:15,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:15,999 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 64, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-18 20:26:16,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:16,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-18 20:26:16,208 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:26:16,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:16,208 INFO L85 PathProgramCache]: Analyzing trace with hash -120695514, now seen corresponding path program 5 times [2022-11-18 20:26:16,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:16,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347345533] [2022-11-18 20:26:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 4926 proven. 833 refuted. 0 times theorem prover too weak. 5486 trivial. 0 not checked. [2022-11-18 20:26:17,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:17,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347345533] [2022-11-18 20:26:17,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347345533] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:17,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191555476] [2022-11-18 20:26:17,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:26:17,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:17,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:17,971 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:17,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:26:23,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-11-18 20:26:23,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:26:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 6585 proven. 3571 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2022-11-18 20:26:24,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 11245 backedges. 7345 proven. 2811 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2022-11-18 20:26:25,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191555476] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:25,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:25,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 62 [2022-11-18 20:26:25,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333874031] [2022-11-18 20:26:25,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:25,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-18 20:26:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:25,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-18 20:26:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=3141, Unknown=0, NotChecked=0, Total=3782 [2022-11-18 20:26:25,964 INFO L87 Difference]: Start difference. First operand 504 states and 518 transitions. Second operand has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:30,492 INFO L93 Difference]: Finished difference Result 504 states and 517 transitions. [2022-11-18 20:26:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-18 20:26:30,492 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 436 [2022-11-18 20:26:30,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:30,495 INFO L225 Difference]: With dead ends: 504 [2022-11-18 20:26:30,495 INFO L226 Difference]: Without dead ends: 504 [2022-11-18 20:26:30,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 830 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4906 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3683, Invalid=15499, Unknown=0, NotChecked=0, Total=19182 [2022-11-18 20:26:30,498 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 233 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 4482 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 4514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:30,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 417 Invalid, 4514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4482 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-18 20:26:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-11-18 20:26:30,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-11-18 20:26:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 1.034) internal successors, (517), 503 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 517 transitions. [2022-11-18 20:26:30,505 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 517 transitions. Word has length 436 [2022-11-18 20:26:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:30,506 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 517 transitions. [2022-11-18 20:26:30,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 5.645161290322581) internal successors, (350), 62 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 517 transitions. [2022-11-18 20:26:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2022-11-18 20:26:30,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:30,509 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 65, 65, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-18 20:26:30,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:30,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-18 20:26:30,720 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:26:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1059357911, now seen corresponding path program 6 times [2022-11-18 20:26:30,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:30,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588087882] [2022-11-18 20:26:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:30,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11575 backedges. 2529 proven. 3474 refuted. 0 times theorem prover too weak. 5572 trivial. 0 not checked. [2022-11-18 20:26:33,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588087882] [2022-11-18 20:26:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588087882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197373027] [2022-11-18 20:26:33,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:26:33,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:33,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:33,734 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:33,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:26:33,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 20:26:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:33,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:26:33,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:34,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-18 20:26:34,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:26:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11575 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 11537 trivial. 0 not checked. [2022-11-18 20:26:35,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:26:35,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197373027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:35,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:26:35,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 31 [2022-11-18 20:26:35,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876865226] [2022-11-18 20:26:35,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:35,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:26:35,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:26:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:26:35,712 INFO L87 Difference]: Start difference. First operand 504 states and 517 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:35,765 INFO L93 Difference]: Finished difference Result 503 states and 516 transitions. [2022-11-18 20:26:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:26:35,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 441 [2022-11-18 20:26:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:35,768 INFO L225 Difference]: With dead ends: 503 [2022-11-18 20:26:35,768 INFO L226 Difference]: Without dead ends: 503 [2022-11-18 20:26:35,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:26:35,769 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:35,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 45 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:26:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-11-18 20:26:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 502. [2022-11-18 20:26:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 499 states have (on average 1.032064128256513) internal successors, (515), 501 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 515 transitions. [2022-11-18 20:26:35,777 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 515 transitions. Word has length 441 [2022-11-18 20:26:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:35,778 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 515 transitions. [2022-11-18 20:26:35,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 515 transitions. [2022-11-18 20:26:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2022-11-18 20:26:35,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:35,781 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 65, 65, 65, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:35,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:35,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:35,995 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:26:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:35,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1519644578, now seen corresponding path program 2 times [2022-11-18 20:26:35,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:35,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67435874] [2022-11-18 20:26:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:35,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11565 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 11375 trivial. 0 not checked. [2022-11-18 20:26:36,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67435874] [2022-11-18 20:26:36,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67435874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184549832] [2022-11-18 20:26:36,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:26:36,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:36,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:36,995 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:37,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:26:37,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:26:37,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:26:37,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:40,285 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_33| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_28| Int) (v_ArrVal_2261 Int) (v_ArrVal_2263 Int) (v_ArrVal_2262 Int)) (and (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2262) |v_ULTIMATE.start_main_~#mask~0#1.base_28| v_ArrVal_2261) |v_ULTIMATE.start_main_~#b~0#1.base_33| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_28| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33| v_ArrVal_2263) |v_ULTIMATE.start_main_~#mask~0#1.base_28|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_33|) 0))) is different from true [2022-11-18 20:26:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11565 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11565 trivial. 0 not checked. [2022-11-18 20:26:40,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:26:40,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184549832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:26:40,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:26:40,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 15 [2022-11-18 20:26:40,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378135906] [2022-11-18 20:26:40,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:26:40,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:26:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:40,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:26:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2022-11-18 20:26:40,294 INFO L87 Difference]: Start difference. First operand 502 states and 515 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:40,296 INFO L93 Difference]: Finished difference Result 501 states and 514 transitions. [2022-11-18 20:26:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:26:40,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 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 442 [2022-11-18 20:26:40,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:40,299 INFO L225 Difference]: With dead ends: 501 [2022-11-18 20:26:40,299 INFO L226 Difference]: Without dead ends: 457 [2022-11-18 20:26:40,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2022-11-18 20:26:40,300 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:40,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-11-18 20:26:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-18 20:26:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2022-11-18 20:26:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 450 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 463 transitions. [2022-11-18 20:26:40,307 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 463 transitions. Word has length 442 [2022-11-18 20:26:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:40,308 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 463 transitions. [2022-11-18 20:26:40,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:26:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 463 transitions. [2022-11-18 20:26:40,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-11-18 20:26:40,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:40,316 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-11-18 20:26:40,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:40,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:40,522 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:26:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 9 times [2022-11-18 20:26:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:40,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006101819] [2022-11-18 20:26:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 8596 proven. 1474 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2022-11-18 20:26:42,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:42,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006101819] [2022-11-18 20:26:42,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006101819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:42,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629745633] [2022-11-18 20:26:42,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:26:42,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:42,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:42,740 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:42,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:26:43,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-18 20:26:43,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:43,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:26:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2384 proven. 6676 refuted. 0 times theorem prover too weak. 6296 trivial. 0 not checked. [2022-11-18 20:26:44,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 0 proven. 9060 refuted. 0 times theorem prover too weak. 6296 trivial. 0 not checked. [2022-11-18 20:26:47,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629745633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:26:47,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:26:47,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20, 20] total 76 [2022-11-18 20:26:47,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645863522] [2022-11-18 20:26:47,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:47,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-18 20:26:47,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-18 20:26:47,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2022-11-18 20:26:47,283 INFO L87 Difference]: Start difference. First operand 451 states and 463 transitions. Second operand has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:12,998 INFO L93 Difference]: Finished difference Result 765 states and 801 transitions. [2022-11-18 20:27:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-11-18 20:27:12,999 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 448 [2022-11-18 20:27:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:13,002 INFO L225 Difference]: With dead ends: 765 [2022-11-18 20:27:13,002 INFO L226 Difference]: Without dead ends: 765 [2022-11-18 20:27:13,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1113 GetRequests, 862 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26070 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=15061, Invalid=48695, Unknown=0, NotChecked=0, Total=63756 [2022-11-18 20:27:13,005 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2513 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2513 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:13,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2513 Valid, 111 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:27:13,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-11-18 20:27:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 751. [2022-11-18 20:27:13,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 749 states have (on average 1.0534045393858478) internal successors, (789), 750 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 789 transitions. [2022-11-18 20:27:13,016 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 789 transitions. Word has length 448 [2022-11-18 20:27:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:13,017 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 789 transitions. [2022-11-18 20:27:13,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.684210526315789) internal successors, (356), 76 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 789 transitions. [2022-11-18 20:27:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2022-11-18 20:27:13,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:13,021 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 87, 87, 87, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1] [2022-11-18 20:27:13,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:13,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 20:27:13,231 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:27:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash 566383551, now seen corresponding path program 3 times [2022-11-18 20:27:13,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:13,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446585765] [2022-11-18 20:27:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:13,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 10633 proven. 1636 refuted. 0 times theorem prover too weak. 7902 trivial. 0 not checked. [2022-11-18 20:27:15,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:15,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446585765] [2022-11-18 20:27:15,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446585765] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:15,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069494477] [2022-11-18 20:27:15,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:27:15,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:15,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:15,850 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:15,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:27:16,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:27:16,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:16,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:27:16,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:16,114 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:27:16,114 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 [2022-11-18 20:27:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 108 proven. 7575 refuted. 0 times theorem prover too weak. 12488 trivial. 0 not checked. [2022-11-18 20:27:17,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 0 proven. 7683 refuted. 0 times theorem prover too weak. 12488 trivial. 0 not checked. [2022-11-18 20:27:21,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069494477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:21,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:21,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 6, 6] total 49 [2022-11-18 20:27:21,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336348111] [2022-11-18 20:27:21,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:21,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 20:27:21,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:21,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 20:27:21,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1940, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:27:21,015 INFO L87 Difference]: Start difference. First operand 751 states and 789 transitions. Second operand has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:23,988 INFO L93 Difference]: Finished difference Result 776 states and 802 transitions. [2022-11-18 20:27:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:27:23,989 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 511 [2022-11-18 20:27:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:23,991 INFO L225 Difference]: With dead ends: 776 [2022-11-18 20:27:23,991 INFO L226 Difference]: Without dead ends: 776 [2022-11-18 20:27:23,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1112 GetRequests, 1013 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2859 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2234, Invalid=7866, Unknown=0, NotChecked=0, Total=10100 [2022-11-18 20:27:23,992 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1279 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:23,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 69 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:27:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-11-18 20:27:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 695. [2022-11-18 20:27:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.037463976945245) internal successors, (720), 694 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 720 transitions. [2022-11-18 20:27:24,002 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 720 transitions. Word has length 511 [2022-11-18 20:27:24,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:24,003 INFO L495 AbstractCegarLoop]: Abstraction has 695 states and 720 transitions. [2022-11-18 20:27:24,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.8979591836734695) internal successors, (240), 49 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:24,003 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 720 transitions. [2022-11-18 20:27:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2022-11-18 20:27:24,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:24,009 INFO L195 NwaCegarLoop]: trace histogram [122, 121, 121, 121, 121, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1] [2022-11-18 20:27:24,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:24,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:24,214 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:27:24,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:24,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1780829527, now seen corresponding path program 10 times [2022-11-18 20:27:24,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:24,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812658197] [2022-11-18 20:27:24,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:24,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 21336 proven. 5769 refuted. 0 times theorem prover too weak. 11375 trivial. 0 not checked. [2022-11-18 20:27:29,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:29,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812658197] [2022-11-18 20:27:29,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812658197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:29,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77729483] [2022-11-18 20:27:29,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:27:29,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:29,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:29,169 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:29,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 20:27:31,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:27:31,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:31,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 2022 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 20:27:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 1298 proven. 34498 refuted. 0 times theorem prover too weak. 2684 trivial. 0 not checked. [2022-11-18 20:27:33,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 38480 backedges. 1298 proven. 34498 refuted. 0 times theorem prover too weak. 2684 trivial. 0 not checked. [2022-11-18 20:27:35,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77729483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:35,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:35,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 38, 38] total 123 [2022-11-18 20:27:35,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97141127] [2022-11-18 20:27:35,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:35,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-18 20:27:35,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-18 20:27:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2306, Invalid=12700, Unknown=0, NotChecked=0, Total=15006 [2022-11-18 20:27:35,682 INFO L87 Difference]: Start difference. First operand 695 states and 720 transitions. Second operand has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:54,151 INFO L93 Difference]: Finished difference Result 1668 states and 1758 transitions. [2022-11-18 20:27:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 313 states. [2022-11-18 20:27:54,152 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 0 states have call successors, (0), 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 694 [2022-11-18 20:27:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:54,155 INFO L225 Difference]: With dead ends: 1668 [2022-11-18 20:27:54,155 INFO L226 Difference]: Without dead ends: 1668 [2022-11-18 20:27:54,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1320 SyntacticMatches, 10 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71608 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=27575, Invalid=146731, Unknown=0, NotChecked=0, Total=174306 [2022-11-18 20:27:54,163 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 3686 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 4609 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3686 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 5359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 4609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:54,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3686 Valid, 375 Invalid, 5359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 4609 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-18 20:27:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-11-18 20:27:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1640. [2022-11-18 20:27:54,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.055521659548505) internal successors, (1730), 1639 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1730 transitions. [2022-11-18 20:27:54,184 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1730 transitions. Word has length 694 [2022-11-18 20:27:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:54,185 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 1730 transitions. [2022-11-18 20:27:54,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 6.073170731707317) internal successors, (747), 123 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1730 transitions. [2022-11-18 20:27:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1343 [2022-11-18 20:27:54,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:54,199 INFO L195 NwaCegarLoop]: trace histogram [239, 238, 238, 238, 238, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-18 20:27:54,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:54,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:54,400 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:27:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:54,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1519464941, now seen corresponding path program 11 times [2022-11-18 20:27:54,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:54,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717505246] [2022-11-18 20:27:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 86544 proven. 2852 refuted. 0 times theorem prover too weak. 58605 trivial. 0 not checked. [2022-11-18 20:27:59,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:59,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717505246] [2022-11-18 20:27:59,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717505246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:59,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45571141] [2022-11-18 20:27:59,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:27:59,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:59,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:59,588 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:59,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 20:28:35,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-11-18 20:28:35,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:35,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:28:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:36,816 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 91615 proven. 7532 refuted. 0 times theorem prover too weak. 48854 trivial. 0 not checked. [2022-11-18 20:28:36,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 148001 backedges. 93272 proven. 5875 refuted. 0 times theorem prover too weak. 48854 trivial. 0 not checked. [2022-11-18 20:28:38,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45571141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:38,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:38,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 78 [2022-11-18 20:28:38,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428225167] [2022-11-18 20:28:38,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:38,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-18 20:28:38,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:38,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-18 20:28:38,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=982, Invalid=5024, Unknown=0, NotChecked=0, Total=6006 [2022-11-18 20:28:38,417 INFO L87 Difference]: Start difference. First operand 1640 states and 1730 transitions. Second operand has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:28:46,156 INFO L93 Difference]: Finished difference Result 1640 states and 1694 transitions. [2022-11-18 20:28:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-18 20:28:46,156 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 0 states have call successors, (0), 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 1342 [2022-11-18 20:28:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:28:46,160 INFO L225 Difference]: With dead ends: 1640 [2022-11-18 20:28:46,160 INFO L226 Difference]: Without dead ends: 1640 [2022-11-18 20:28:46,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2834 GetRequests, 2630 SyntacticMatches, 10 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9980 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=7187, Invalid=31033, Unknown=0, NotChecked=0, Total=38220 [2022-11-18 20:28:46,162 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 282 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 6266 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 6303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 6266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:28:46,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 186 Invalid, 6303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 6266 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-18 20:28:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2022-11-18 20:28:46,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1640. [2022-11-18 20:28:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.0335570469798658) internal successors, (1694), 1639 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1694 transitions. [2022-11-18 20:28:46,185 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1694 transitions. Word has length 1342 [2022-11-18 20:28:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:28:46,186 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 1694 transitions. [2022-11-18 20:28:46,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 5.730769230769231) internal successors, (447), 78 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1694 transitions. [2022-11-18 20:28:46,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1383 [2022-11-18 20:28:46,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:28:46,204 INFO L195 NwaCegarLoop]: trace histogram [247, 246, 246, 246, 246, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-18 20:28:46,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:46,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-18 20:28:46,410 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:28:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash 884344755, now seen corresponding path program 12 times [2022-11-18 20:28:46,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:46,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935788395] [2022-11-18 20:28:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:46,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 92683 proven. 1595 refuted. 0 times theorem prover too weak. 63567 trivial. 0 not checked. [2022-11-18 20:28:50,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935788395] [2022-11-18 20:28:50,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935788395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879109835] [2022-11-18 20:28:50,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:28:50,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:50,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:50,671 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:50,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 20:29:02,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2022-11-18 20:29:02,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:02,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2231 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 20:29:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 0 proven. 26770 refuted. 0 times theorem prover too weak. 131075 trivial. 0 not checked. [2022-11-18 20:29:04,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 157845 backedges. 25571 proven. 1199 refuted. 0 times theorem prover too weak. 131075 trivial. 0 not checked. [2022-11-18 20:29:06,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879109835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:06,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:06,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 25, 24] total 81 [2022-11-18 20:29:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230430812] [2022-11-18 20:29:06,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-18 20:29:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-18 20:29:06,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=5646, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:29:06,475 INFO L87 Difference]: Start difference. First operand 1640 states and 1694 transitions. Second operand has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:25,473 INFO L93 Difference]: Finished difference Result 1963 states and 2027 transitions. [2022-11-18 20:29:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-18 20:29:25,474 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 0 states have call successors, (0), 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 1382 [2022-11-18 20:29:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:25,479 INFO L225 Difference]: With dead ends: 1963 [2022-11-18 20:29:25,479 INFO L226 Difference]: Without dead ends: 1963 [2022-11-18 20:29:25,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2908 GetRequests, 2718 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8922 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=5164, Invalid=31508, Unknown=0, NotChecked=0, Total=36672 [2022-11-18 20:29:25,484 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2671 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 7723 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2671 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 7895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 7723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:25,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2671 Valid, 1161 Invalid, 7895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 7723 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-18 20:29:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-11-18 20:29:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1690. [2022-11-18 20:29:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0325636471284785) internal successors, (1744), 1689 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1744 transitions. [2022-11-18 20:29:25,572 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1744 transitions. Word has length 1382 [2022-11-18 20:29:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:25,572 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1744 transitions. [2022-11-18 20:29:25,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 5.1234567901234565) internal successors, (415), 81 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:25,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1744 transitions. [2022-11-18 20:29:25,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1468 [2022-11-18 20:29:25,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:25,592 INFO L195 NwaCegarLoop]: trace histogram [264, 263, 263, 263, 263, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-18 20:29:25,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:25,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 20:29:25,815 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:29:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1199622708, now seen corresponding path program 13 times [2022-11-18 20:29:25,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:25,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483100264] [2022-11-18 20:29:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 106853 proven. 1823 refuted. 0 times theorem prover too weak. 71150 trivial. 0 not checked. [2022-11-18 20:29:30,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:30,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483100264] [2022-11-18 20:29:30,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483100264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:30,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514033612] [2022-11-18 20:29:30,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:29:30,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:30,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:30,399 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:30,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 20:29:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:31,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 4165 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 20:29:31,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 124640 proven. 9808 refuted. 0 times theorem prover too weak. 45378 trivial. 0 not checked. [2022-11-18 20:29:33,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 179826 backedges. 124640 proven. 9808 refuted. 0 times theorem prover too weak. 45378 trivial. 0 not checked. [2022-11-18 20:29:35,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514033612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:35,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:35,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 81 [2022-11-18 20:29:35,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226870805] [2022-11-18 20:29:35,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:35,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-18 20:29:35,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-18 20:29:35,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=5446, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:29:35,332 INFO L87 Difference]: Start difference. First operand 1690 states and 1744 transitions. Second operand has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:29:47,104 INFO L93 Difference]: Finished difference Result 1690 states and 1735 transitions. [2022-11-18 20:29:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-18 20:29:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 0 states have call successors, (0), 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 1467 [2022-11-18 20:29:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:29:47,108 INFO L225 Difference]: With dead ends: 1690 [2022-11-18 20:29:47,108 INFO L226 Difference]: Without dead ends: 1690 [2022-11-18 20:29:47,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3119 GetRequests, 2875 SyntacticMatches, 15 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14030 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=9152, Invalid=43978, Unknown=0, NotChecked=0, Total=53130 [2022-11-18 20:29:47,112 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 267 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 9891 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 9916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 9891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:29:47,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 411 Invalid, 9916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 9891 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-18 20:29:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2022-11-18 20:29:47,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2022-11-18 20:29:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0272350503256364) internal successors, (1735), 1689 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1735 transitions. [2022-11-18 20:29:47,134 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1735 transitions. Word has length 1467 [2022-11-18 20:29:47,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:29:47,134 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1735 transitions. [2022-11-18 20:29:47,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.222222222222222) internal successors, (504), 81 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1735 transitions. [2022-11-18 20:29:47,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1498 [2022-11-18 20:29:47,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:29:47,154 INFO L195 NwaCegarLoop]: trace histogram [270, 269, 269, 269, 269, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-18 20:29:47,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:47,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:47,366 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:29:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash -697448124, now seen corresponding path program 14 times [2022-11-18 20:29:47,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:47,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682483118] [2022-11-18 20:29:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:47,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 187929 backedges. 112995 proven. 2066 refuted. 0 times theorem prover too weak. 72868 trivial. 0 not checked. [2022-11-18 20:29:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682483118] [2022-11-18 20:29:52,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682483118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596160587] [2022-11-18 20:29:52,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:52,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:52,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:52,543 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:52,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 20:29:53,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:53,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:53,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 4243 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 20:29:53,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 187929 backedges. 137142 proven. 11806 refuted. 0 times theorem prover too weak. 38981 trivial. 0 not checked. [2022-11-18 20:29:55,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 187929 backedges. 137142 proven. 11806 refuted. 0 times theorem prover too weak. 38981 trivial. 0 not checked. [2022-11-18 20:29:58,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596160587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:58,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:58,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 35, 35] total 86 [2022-11-18 20:29:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012024951] [2022-11-18 20:29:58,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:58,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-18 20:29:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:58,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-18 20:29:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1158, Invalid=6152, Unknown=0, NotChecked=0, Total=7310 [2022-11-18 20:29:58,026 INFO L87 Difference]: Start difference. First operand 1690 states and 1735 transitions. Second operand has 86 states, 86 states have (on average 6.232558139534884) internal successors, (536), 86 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:12,057 INFO L93 Difference]: Finished difference Result 1690 states and 1727 transitions. [2022-11-18 20:30:12,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-11-18 20:30:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 6.232558139534884) internal successors, (536), 86 states have internal predecessors, (536), 0 states have call successors, (0), 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 1497 [2022-11-18 20:30:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:12,063 INFO L225 Difference]: With dead ends: 1690 [2022-11-18 20:30:12,063 INFO L226 Difference]: Without dead ends: 1690 [2022-11-18 20:30:12,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3199 GetRequests, 2931 SyntacticMatches, 16 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17064 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=11029, Invalid=53233, Unknown=0, NotChecked=0, Total=64262 [2022-11-18 20:30:12,066 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 286 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 11821 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 11855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 11821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:12,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 524 Invalid, 11855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 11821 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-18 20:30:12,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2022-11-18 20:30:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2022-11-18 20:30:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.0224985198342214) internal successors, (1727), 1689 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 1727 transitions. [2022-11-18 20:30:12,087 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 1727 transitions. Word has length 1497 [2022-11-18 20:30:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:12,088 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 1727 transitions. [2022-11-18 20:30:12,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 6.232558139534884) internal successors, (536), 86 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 1727 transitions. [2022-11-18 20:30:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1523 [2022-11-18 20:30:12,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:12,109 INFO L195 NwaCegarLoop]: trace histogram [275, 274, 274, 274, 274, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-11-18 20:30:12,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-18 20:30:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-18 20:30:12,322 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:30:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1275194083, now seen corresponding path program 15 times [2022-11-18 20:30:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235909141] [2022-11-18 20:30:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:12,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 194819 backedges. 116495 proven. 2324 refuted. 0 times theorem prover too weak. 76000 trivial. 0 not checked. [2022-11-18 20:30:18,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:18,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235909141] [2022-11-18 20:30:18,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235909141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:18,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40979247] [2022-11-18 20:30:18,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:18,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:18,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:18,182 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:18,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-18 20:30:21,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-18 20:30:21,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:21,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-18 20:30:21,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 194819 backedges. 25001 proven. 41200 refuted. 0 times theorem prover too weak. 128618 trivial. 0 not checked. [2022-11-18 20:30:25,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 194819 backedges. 0 proven. 66201 refuted. 0 times theorem prover too weak. 128618 trivial. 0 not checked. [2022-11-18 20:30:30,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40979247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:30,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:30,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 31, 31] total 100 [2022-11-18 20:30:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347431650] [2022-11-18 20:30:30,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:30,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-18 20:30:30,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-18 20:30:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1733, Invalid=8167, Unknown=0, NotChecked=0, Total=9900 [2022-11-18 20:30:30,781 INFO L87 Difference]: Start difference. First operand 1690 states and 1727 transitions. Second operand has 100 states, 100 states have (on average 4.88) internal successors, (488), 100 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:30:56,078 INFO L93 Difference]: Finished difference Result 2316 states and 2392 transitions. [2022-11-18 20:30:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2022-11-18 20:30:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 4.88) internal successors, (488), 100 states have internal predecessors, (488), 0 states have call successors, (0), 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 1522 [2022-11-18 20:30:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:30:56,085 INFO L225 Difference]: With dead ends: 2316 [2022-11-18 20:30:56,085 INFO L226 Difference]: Without dead ends: 2316 [2022-11-18 20:30:56,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3326 GetRequests, 2985 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37465 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=19431, Invalid=97875, Unknown=0, NotChecked=0, Total=117306 [2022-11-18 20:30:56,092 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 6528 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 3705 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6528 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 4460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 3705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:30:56,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6528 Valid, 484 Invalid, 4460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 3705 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-18 20:30:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-11-18 20:30:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1984. [2022-11-18 20:30:56,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 1.02672718103883) internal successors, (2036), 1983 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2036 transitions. [2022-11-18 20:30:56,117 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2036 transitions. Word has length 1522 [2022-11-18 20:30:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:30:56,118 INFO L495 AbstractCegarLoop]: Abstraction has 1984 states and 2036 transitions. [2022-11-18 20:30:56,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 4.88) internal successors, (488), 100 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2036 transitions. [2022-11-18 20:30:56,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1934 [2022-11-18 20:30:56,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:30:56,148 INFO L195 NwaCegarLoop]: trace histogram [353, 352, 352, 352, 352, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1] [2022-11-18 20:30:56,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:56,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:56,371 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:30:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:56,372 INFO L85 PathProgramCache]: Analyzing trace with hash -947449120, now seen corresponding path program 16 times [2022-11-18 20:30:56,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:56,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579403978] [2022-11-18 20:30:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:56,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 320012 backedges. 188458 proven. 2597 refuted. 0 times theorem prover too weak. 128957 trivial. 0 not checked. [2022-11-18 20:31:04,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579403978] [2022-11-18 20:31:04,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579403978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33300046] [2022-11-18 20:31:04,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:31:04,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:04,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:04,050 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:04,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-18 20:31:22,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:31:22,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:22,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 5421 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 20:31:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 320012 backedges. 241929 proven. 18233 refuted. 0 times theorem prover too weak. 59850 trivial. 0 not checked. [2022-11-18 20:31:24,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 320012 backedges. 241929 proven. 18233 refuted. 0 times theorem prover too weak. 59850 trivial. 0 not checked. [2022-11-18 20:31:28,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33300046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:28,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:28,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 40, 40] total 98 [2022-11-18 20:31:28,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727446899] [2022-11-18 20:31:28,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:28,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-18 20:31:28,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-18 20:31:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1469, Invalid=8037, Unknown=0, NotChecked=0, Total=9506 [2022-11-18 20:31:28,250 INFO L87 Difference]: Start difference. First operand 1984 states and 2036 transitions. Second operand has 98 states, 98 states have (on average 6.377551020408164) internal successors, (625), 98 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:48,812 INFO L93 Difference]: Finished difference Result 1984 states and 2021 transitions. [2022-11-18 20:31:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2022-11-18 20:31:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 6.377551020408164) internal successors, (625), 98 states have internal predecessors, (625), 0 states have call successors, (0), 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 1933 [2022-11-18 20:31:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:48,819 INFO L225 Difference]: With dead ends: 1984 [2022-11-18 20:31:48,819 INFO L226 Difference]: Without dead ends: 1984 [2022-11-18 20:31:48,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4134 GetRequests, 3793 SyntacticMatches, 18 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28153 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=18436, Invalid=86864, Unknown=0, NotChecked=0, Total=105300 [2022-11-18 20:31:48,825 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 314 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 14155 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 14191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 14155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:48,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 475 Invalid, 14191 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 14155 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-18 20:31:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-11-18 20:31:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1984. [2022-11-18 20:31:48,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 1.0191628845184064) internal successors, (2021), 1983 states have internal predecessors, (2021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2021 transitions. [2022-11-18 20:31:48,849 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2021 transitions. Word has length 1933 [2022-11-18 20:31:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:48,850 INFO L495 AbstractCegarLoop]: Abstraction has 1984 states and 2021 transitions. [2022-11-18 20:31:48,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 6.377551020408164) internal successors, (625), 98 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2021 transitions. [2022-11-18 20:31:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1969 [2022-11-18 20:31:48,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:48,882 INFO L195 NwaCegarLoop]: trace histogram [360, 359, 359, 359, 359, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1] [2022-11-18 20:31:48,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:49,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:49,098 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-18 20:31:49,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:49,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1931788847, now seen corresponding path program 17 times [2022-11-18 20:31:49,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:49,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986620454] [2022-11-18 20:31:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:49,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 332619 backedges. 193335 proven. 3188 refuted. 0 times theorem prover too weak. 136096 trivial. 0 not checked. [2022-11-18 20:31:57,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:57,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986620454] [2022-11-18 20:31:57,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986620454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580817615] [2022-11-18 20:31:57,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:31:57,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:57,837 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:57,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0181df77-7b80-43ca-bbae-b995ac95e9b4/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process