./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN --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 b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- 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-6b4ec56 [2022-11-20 11:09:12,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:09:12,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:09:12,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:09:12,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:09:12,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:09:12,295 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:09:12,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:09:12,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:09:12,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:09:12,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:09:12,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:09:12,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:09:12,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:09:12,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:09:12,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:09:12,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:09:12,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:09:12,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:09:12,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:09:12,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:09:12,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:09:12,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:09:12,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:09:12,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:09:12,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:09:12,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:09:12,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:09:12,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:09:12,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:09:12,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:09:12,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:09:12,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:09:12,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:09:12,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:09:12,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:09:12,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:09:12,359 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:09:12,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:09:12,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:09:12,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:09:12,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:09:12,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:09:12,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:09:12,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:09:12,407 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:09:12,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:09:12,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:09:12,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:09:12,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:09:12,409 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:09:12,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:09:12,411 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:09:12,411 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:09:12,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:09:12,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:09:12,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:09:12,412 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:09:12,413 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:09:12,413 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:09:12,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:09:12,413 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:09:12,414 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:09:12,414 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:09:12,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:09:12,415 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:09:12,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:09:12,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:09:12,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:09:12,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:09:12,416 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:09:12,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:09:12,417 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_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2022-11-20 11:09:12,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:09:12,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:09:12,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:09:12,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:09:12,801 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:09:12,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-11-20 11:09:16,170 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:09:16,642 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:09:16,643 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-11-20 11:09:16,672 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/data/85245b479/d24d90b6d7574274a1c79f93b3c378a5/FLAGb71a9ce08 [2022-11-20 11:09:16,694 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/data/85245b479/d24d90b6d7574274a1c79f93b3c378a5 [2022-11-20 11:09:16,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:09:16,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:09:16,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:09:16,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:09:16,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:09:16,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:09:16" (1/1) ... [2022-11-20 11:09:16,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@553ae71b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:16, skipping insertion in model container [2022-11-20 11:09:16,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:09:16" (1/1) ... [2022-11-20 11:09:16,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:09:16,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:09:17,182 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-11-20 11:09:17,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:09:17,197 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:09:17,248 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-11-20 11:09:17,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:09:17,284 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:09:17,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17 WrapperNode [2022-11-20 11:09:17,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:09:17,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:09:17,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:09:17,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:09:17,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,357 INFO L138 Inliner]: procedures = 126, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 108 [2022-11-20 11:09:17,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:09:17,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:09:17,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:09:17,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:09:17,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,398 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:09:17,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:09:17,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:09:17,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:09:17,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (1/1) ... [2022-11-20 11:09:17,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:09:17,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:17,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:09:17,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:09:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:09:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:09:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:09:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:09:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:09:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:09:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:09:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 11:09:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:09:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:09:17,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:09:17,680 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:09:17,683 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:09:18,101 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:09:18,108 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:09:18,109 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:09:18,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:09:18 BoogieIcfgContainer [2022-11-20 11:09:18,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:09:18,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:09:18,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:09:18,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:09:18,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:09:16" (1/3) ... [2022-11-20 11:09:18,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113654ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:09:18, skipping insertion in model container [2022-11-20 11:09:18,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:09:17" (2/3) ... [2022-11-20 11:09:18,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@113654ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:09:18, skipping insertion in model container [2022-11-20 11:09:18,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:09:18" (3/3) ... [2022-11-20 11:09:18,131 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2022-11-20 11:09:18,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:09:18,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-20 11:09:18,225 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:09:18,233 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;@47135c73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:09:18,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-11-20 11:09:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 40 states have (on average 2.025) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:09:18,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:18,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:09:18,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash 28698858, now seen corresponding path program 1 times [2022-11-20 11:09:18,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:18,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619299580] [2022-11-20 11:09:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:18,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:18,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619299580] [2022-11-20 11:09:18,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619299580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:18,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:18,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:09:18,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228610136] [2022-11-20 11:09:18,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:18,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:09:18,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:18,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:09:18,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:09:18,626 INFO L87 Difference]: Start difference. First operand has 73 states, 40 states have (on average 2.025) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2022-11-20 11:09:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:18,825 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2022-11-20 11:09:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:09:18,829 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 [2022-11-20 11:09:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:18,841 INFO L225 Difference]: With dead ends: 118 [2022-11-20 11:09:18,842 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 11:09:18,844 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 [2022-11-20 11:09:18,852 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 60 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:18,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 128 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:09:18,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 11:09:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 68. [2022-11-20 11:09:18,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.868421052631579) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-11-20 11:09:18,915 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 5 [2022-11-20 11:09:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:18,916 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-11-20 11:09:18,917 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) [2022-11-20 11:09:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-11-20 11:09:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:09:18,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:18,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:09:18,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:09:18,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:18,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:18,921 INFO L85 PathProgramCache]: Analyzing trace with hash 28698859, now seen corresponding path program 1 times [2022-11-20 11:09:18,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:18,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743760639] [2022-11-20 11:09:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:18,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:19,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:19,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743760639] [2022-11-20 11:09:19,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743760639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:19,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:19,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:09:19,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099516497] [2022-11-20 11:09:19,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:19,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:09:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:09:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:09:19,108 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. 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) [2022-11-20 11:09:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:19,282 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-11-20 11:09:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:09:19,283 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 [2022-11-20 11:09:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:19,285 INFO L225 Difference]: With dead ends: 120 [2022-11-20 11:09:19,285 INFO L226 Difference]: Without dead ends: 120 [2022-11-20 11:09:19,286 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 [2022-11-20 11:09:19,287 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 65 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:19,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 139 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-20 11:09:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 66. [2022-11-20 11:09:19,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-11-20 11:09:19,312 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 5 [2022-11-20 11:09:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:19,313 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-11-20 11:09:19,313 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) [2022-11-20 11:09:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-11-20 11:09:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:09:19,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:19,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:19,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:09:19,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:19,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1808567273, now seen corresponding path program 1 times [2022-11-20 11:09:19,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:19,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569826944] [2022-11-20 11:09:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:19,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:19,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:19,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569826944] [2022-11-20 11:09:19,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569826944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:19,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:19,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:09:19,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311172590] [2022-11-20 11:09:19,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:19,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:09:19,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:09:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:09:19,425 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:19,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:19,452 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-11-20 11:09:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:09:19,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:09:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:19,454 INFO L225 Difference]: With dead ends: 77 [2022-11-20 11:09:19,455 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 11:09:19,455 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 [2022-11-20 11:09:19,457 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:19,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 132 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:09:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 11:09:19,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-11-20 11:09:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.794871794871795) internal successors, (70), 66 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) [2022-11-20 11:09:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-11-20 11:09:19,465 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 7 [2022-11-20 11:09:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:19,465 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-11-20 11:09:19,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-11-20 11:09:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:09:19,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:19,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:19,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:09:19,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:19,468 INFO L85 PathProgramCache]: Analyzing trace with hash -245418610, now seen corresponding path program 1 times [2022-11-20 11:09:19,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:19,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954842033] [2022-11-20 11:09:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:19,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:19,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:19,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954842033] [2022-11-20 11:09:19,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954842033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:19,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:19,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:09:19,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628525362] [2022-11-20 11:09:19,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:19,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:19,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:19,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:19,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:19,595 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:19,800 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2022-11-20 11:09:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:19,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:09:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:19,801 INFO L225 Difference]: With dead ends: 115 [2022-11-20 11:09:19,802 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 11:09:19,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:09:19,804 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 161 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:19,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 126 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:09:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 11:09:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 66. [2022-11-20 11:09:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-11-20 11:09:19,812 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 9 [2022-11-20 11:09:19,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:19,812 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-11-20 11:09:19,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-11-20 11:09:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:09:19,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:19,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:19,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:09:19,814 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:19,814 INFO L85 PathProgramCache]: Analyzing trace with hash -245418609, now seen corresponding path program 1 times [2022-11-20 11:09:19,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:19,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027100337] [2022-11-20 11:09:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:19,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:20,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:20,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027100337] [2022-11-20 11:09:20,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027100337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:20,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:20,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:09:20,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195984796] [2022-11-20 11:09:20,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:20,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:20,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:20,055 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:20,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:20,209 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-11-20 11:09:20,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:20,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:09:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:20,211 INFO L225 Difference]: With dead ends: 70 [2022-11-20 11:09:20,211 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 11:09:20,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:09:20,213 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 184 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:20,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 42 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 11:09:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-11-20 11:09:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:20,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-11-20 11:09:20,221 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 9 [2022-11-20 11:09:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:20,221 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-11-20 11:09:20,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-11-20 11:09:20,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:09:20,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:20,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:20,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:09:20,223 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:20,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:20,224 INFO L85 PathProgramCache]: Analyzing trace with hash -718760675, now seen corresponding path program 1 times [2022-11-20 11:09:20,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:20,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34935076] [2022-11-20 11:09:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:20,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:20,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34935076] [2022-11-20 11:09:20,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34935076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:20,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591772911] [2022-11-20 11:09:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:20,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:20,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:20,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:20,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:09:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:09:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:20,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:20,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591772911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:20,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:09:20,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-20 11:09:20,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929602012] [2022-11-20 11:09:20,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:20,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:20,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:20,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:20,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:20,636 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2022-11-20 11:09:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:20,652 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-11-20 11:09:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:09:20,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 16 [2022-11-20 11:09:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:20,654 INFO L225 Difference]: With dead ends: 74 [2022-11-20 11:09:20,654 INFO L226 Difference]: Without dead ends: 74 [2022-11-20 11:09:20,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:20,656 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 16 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:20,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 184 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:09:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-20 11:09:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-20 11:09:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-11-20 11:09:20,663 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 16 [2022-11-20 11:09:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:20,664 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-11-20 11:09:20,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2022-11-20 11:09:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-11-20 11:09:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:09:20,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:20,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:20,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:20,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:20,873 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:20,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1731307113, now seen corresponding path program 2 times [2022-11-20 11:09:20,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:20,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188952502] [2022-11-20 11:09:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:20,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:21,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:21,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188952502] [2022-11-20 11:09:21,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188952502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:21,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618875489] [2022-11-20 11:09:21,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:09:21,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:21,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:21,139 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:21,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:09:21,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 11:09:21,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:21,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:09:21,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:09:21,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:21,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618875489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:21,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:09:21,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-20 11:09:21,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871450583] [2022-11-20 11:09:21,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:21,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:09:21,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:21,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:09:21,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:21,383 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:21,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:21,404 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2022-11-20 11:09:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:09:21,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 11:09:21,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:21,405 INFO L225 Difference]: With dead ends: 117 [2022-11-20 11:09:21,406 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 11:09:21,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:21,407 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 143 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:21,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 127 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:09:21,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 11:09:21,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2022-11-20 11:09:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-11-20 11:09:21,413 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 25 [2022-11-20 11:09:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:21,413 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-11-20 11:09:21,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-11-20 11:09:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:09:21,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:21,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:21,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:21,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 11:09:21,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:21,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1731307113, now seen corresponding path program 1 times [2022-11-20 11:09:21,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:21,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810225225] [2022-11-20 11:09:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:21,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:09:22,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:22,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810225225] [2022-11-20 11:09:22,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810225225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:22,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723361812] [2022-11-20 11:09:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:22,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:22,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:22,091 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:22,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:09:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:22,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:09:22,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:22,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:09:22,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:22,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:09:22,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:22,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:09:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:22,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:22,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723361812] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:22,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:09:22,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-11-20 11:09:22,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674674268] [2022-11-20 11:09:22,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:22,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:09:22,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:09:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:09:22,735 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:22,907 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2022-11-20 11:09:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:09:22,908 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 11:09:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:22,909 INFO L225 Difference]: With dead ends: 116 [2022-11-20 11:09:22,909 INFO L226 Difference]: Without dead ends: 116 [2022-11-20 11:09:22,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:09:22,911 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:22,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 113 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 11:09:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-20 11:09:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2022-11-20 11:09:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.56) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-11-20 11:09:22,917 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 25 [2022-11-20 11:09:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:22,918 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-11-20 11:09:22,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-11-20 11:09:22,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:09:22,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:22,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:22,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:23,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 11:09:23,132 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1731307114, now seen corresponding path program 1 times [2022-11-20 11:09:23,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:23,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206601256] [2022-11-20 11:09:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:23,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:09:23,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:23,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206601256] [2022-11-20 11:09:23,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206601256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:23,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085850897] [2022-11-20 11:09:23,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:23,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:23,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:23,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:23,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:09:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:09:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:23,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:09:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:23,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:09:23,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:23,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:09:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:23,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:26,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:26,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085850897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:26,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:09:26,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2022-11-20 11:09:26,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151264539] [2022-11-20 11:09:26,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:26,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:09:26,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:26,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:09:26,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:09:26,375 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:26,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:26,612 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-11-20 11:09:26,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:09:26,613 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2022-11-20 11:09:26,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:26,613 INFO L225 Difference]: With dead ends: 99 [2022-11-20 11:09:26,613 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 11:09:26,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:09:26,615 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 376 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:26,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 50 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 11:09:26,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2022-11-20 11:09:26,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.44) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-11-20 11:09:26,619 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 25 [2022-11-20 11:09:26,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:26,620 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-11-20 11:09:26,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-11-20 11:09:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 11:09:26,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:26,621 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:26,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:26,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:26,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2130912971, now seen corresponding path program 1 times [2022-11-20 11:09:26,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:26,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294061277] [2022-11-20 11:09:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:26,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:09:27,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294061277] [2022-11-20 11:09:27,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294061277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:27,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:27,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:09:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321950273] [2022-11-20 11:09:27,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:27,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:09:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:09:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:09:27,155 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:27,605 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-11-20 11:09:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:09:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-11-20 11:09:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:27,607 INFO L225 Difference]: With dead ends: 98 [2022-11-20 11:09:27,607 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 11:09:27,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:09:27,608 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 240 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:27,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 229 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:09:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 11:09:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2022-11-20 11:09:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-11-20 11:09:27,612 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 26 [2022-11-20 11:09:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:27,612 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-11-20 11:09:27,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-11-20 11:09:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 11:09:27,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:27,613 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:27,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:09:27,614 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2130912972, now seen corresponding path program 1 times [2022-11-20 11:09:27,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:27,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444079470] [2022-11-20 11:09:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:27,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444079470] [2022-11-20 11:09:28,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444079470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:28,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:28,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:09:28,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163172289] [2022-11-20 11:09:28,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:28,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:09:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:09:28,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:09:28,011 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 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) [2022-11-20 11:09:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:28,556 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-11-20 11:09:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:09:28,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 11:09:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:28,557 INFO L225 Difference]: With dead ends: 93 [2022-11-20 11:09:28,558 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 11:09:28,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:09:28,558 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 455 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:28,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 132 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:09:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 11:09:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2022-11-20 11:09:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-11-20 11:09:28,562 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 26 [2022-11-20 11:09:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:28,562 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-11-20 11:09:28,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 10 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) [2022-11-20 11:09:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-11-20 11:09:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 11:09:28,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:28,563 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:28,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:09:28,563 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:28,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1883258256, now seen corresponding path program 1 times [2022-11-20 11:09:28,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:28,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489903322] [2022-11-20 11:09:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:28,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:28,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:28,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489903322] [2022-11-20 11:09:28,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489903322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:28,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:28,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:09:28,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017134382] [2022-11-20 11:09:28,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:28,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:09:28,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:28,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:09:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:09:28,799 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:29,047 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-11-20 11:09:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:09:29,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2022-11-20 11:09:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:29,048 INFO L225 Difference]: With dead ends: 69 [2022-11-20 11:09:29,048 INFO L226 Difference]: Without dead ends: 69 [2022-11-20 11:09:29,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:09:29,049 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 344 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:29,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 92 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-20 11:09:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-20 11:09:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.411764705882353) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-11-20 11:09:29,052 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 29 [2022-11-20 11:09:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:29,052 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-11-20 11:09:29,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-11-20 11:09:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:09:29,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:29,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:29,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:09:29,053 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:29,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:29,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1748967250, now seen corresponding path program 1 times [2022-11-20 11:09:29,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:29,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152461547] [2022-11-20 11:09:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:29,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:29,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:29,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:29,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152461547] [2022-11-20 11:09:29,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152461547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:29,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:29,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:09:29,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327451140] [2022-11-20 11:09:29,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:29,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:09:29,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:09:29,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:09:29,536 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:30,327 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2022-11-20 11:09:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:09:30,328 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 11:09:30,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:30,328 INFO L225 Difference]: With dead ends: 115 [2022-11-20 11:09:30,328 INFO L226 Difference]: Without dead ends: 115 [2022-11-20 11:09:30,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:09:30,329 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 557 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:30,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 183 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:09:30,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-20 11:09:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2022-11-20 11:09:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 76 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-11-20 11:09:30,333 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 30 [2022-11-20 11:09:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:30,333 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-11-20 11:09:30,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-11-20 11:09:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:09:30,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:30,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:30,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:09:30,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1748967249, now seen corresponding path program 1 times [2022-11-20 11:09:30,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:30,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294923730] [2022-11-20 11:09:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:30,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:09:30,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:30,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294923730] [2022-11-20 11:09:30,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294923730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:30,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:30,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:09:30,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460983137] [2022-11-20 11:09:30,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:30,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:09:30,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:09:30,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:09:30,428 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:30,567 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-11-20 11:09:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:09:30,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 11:09:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:30,568 INFO L225 Difference]: With dead ends: 77 [2022-11-20 11:09:30,568 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 11:09:30,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:09:30,569 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 35 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:30,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 122 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 11:09:30,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-11-20 11:09:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 60 states have (on average 1.4) internal successors, (84), 75 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2022-11-20 11:09:30,573 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 30 [2022-11-20 11:09:30,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:30,573 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2022-11-20 11:09:30,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2022-11-20 11:09:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 11:09:30,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:30,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:30,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:09:30,575 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:30,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1748536300, now seen corresponding path program 1 times [2022-11-20 11:09:30,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:30,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706406644] [2022-11-20 11:09:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:30,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:30,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:30,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706406644] [2022-11-20 11:09:30,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706406644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:30,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:30,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:09:30,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001747304] [2022-11-20 11:09:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:30,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:09:30,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:09:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:09:30,838 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:31,166 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-11-20 11:09:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:09:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 11:09:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:31,167 INFO L225 Difference]: With dead ends: 93 [2022-11-20 11:09:31,167 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 11:09:31,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:09:31,168 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 420 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:31,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 117 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:09:31,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 11:09:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2022-11-20 11:09:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.380952380952381) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2022-11-20 11:09:31,171 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 30 [2022-11-20 11:09:31,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:31,171 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2022-11-20 11:09:31,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2022-11-20 11:09:31,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 11:09:31,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:31,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:31,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:09:31,172 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:31,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:31,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1629949454, now seen corresponding path program 1 times [2022-11-20 11:09:31,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:31,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080955195] [2022-11-20 11:09:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:31,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:09:31,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:31,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080955195] [2022-11-20 11:09:31,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080955195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:31,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:09:31,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:09:31,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913602422] [2022-11-20 11:09:31,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:31,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:09:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:09:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:09:31,256 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:31,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:31,340 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-11-20 11:09:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:09:31,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 11:09:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:31,341 INFO L225 Difference]: With dead ends: 78 [2022-11-20 11:09:31,341 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 11:09:31,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:09:31,342 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:31,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 116 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 11:09:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-20 11:09:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-11-20 11:09:31,345 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 31 [2022-11-20 11:09:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:31,345 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-11-20 11:09:31,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-11-20 11:09:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 11:09:31,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:31,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:31,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:09:31,350 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1425315259, now seen corresponding path program 1 times [2022-11-20 11:09:31,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:31,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137186420] [2022-11-20 11:09:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:31,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:32,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:32,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137186420] [2022-11-20 11:09:32,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137186420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:32,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729860033] [2022-11-20 11:09:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:32,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:32,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:32,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:32,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:09:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:09:32,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:32,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:32,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 140 [2022-11-20 11:09:32,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:32,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 150 [2022-11-20 11:09:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:09:35,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:35,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729860033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:35,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:09:35,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [17] total 23 [2022-11-20 11:09:35,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663822428] [2022-11-20 11:09:35,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:35,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:09:35,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:09:35,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:09:35,725 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2022-11-20 11:09:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:35,890 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2022-11-20 11:09:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:09:35,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 32 [2022-11-20 11:09:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:35,891 INFO L225 Difference]: With dead ends: 78 [2022-11-20 11:09:35,891 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 11:09:35,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:09:35,892 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:35,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 258 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-11-20 11:09:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 11:09:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-11-20 11:09:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.3225806451612903) internal successors, (82), 76 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) [2022-11-20 11:09:35,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2022-11-20 11:09:35,894 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 32 [2022-11-20 11:09:35,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:35,894 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2022-11-20 11:09:35,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2022-11-20 11:09:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2022-11-20 11:09:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 11:09:35,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:35,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:35,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:36,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:09:36,095 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:36,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:36,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1011174575, now seen corresponding path program 1 times [2022-11-20 11:09:36,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:36,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547015964] [2022-11-20 11:09:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:36,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:09:36,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:36,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547015964] [2022-11-20 11:09:36,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547015964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:36,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376641018] [2022-11-20 11:09:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:36,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:36,401 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:36,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:09:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:36,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:09:36,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:36,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:36,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:09:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:09:36,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:09:36,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376641018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:09:36,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:09:36,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2022-11-20 11:09:36,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991094618] [2022-11-20 11:09:36,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:09:36,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:09:36,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:36,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:09:36,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:09:36,693 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-11-20 11:09:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:36,849 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2022-11-20 11:09:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:09:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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 32 [2022-11-20 11:09:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:36,850 INFO L225 Difference]: With dead ends: 84 [2022-11-20 11:09:36,851 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 11:09:36,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:09:36,852 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 97 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:36,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 91 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:09:36,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 11:09:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-11-20 11:09:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 62 states have (on average 1.3064516129032258) internal successors, (81), 75 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-11-20 11:09:36,855 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 32 [2022-11-20 11:09:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:36,855 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-11-20 11:09:36,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 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) [2022-11-20 11:09:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-11-20 11:09:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:09:36,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:36,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:36,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:37,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:09:37,064 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash -366548792, now seen corresponding path program 1 times [2022-11-20 11:09:37,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:37,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632731981] [2022-11-20 11:09:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:37,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:38,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:38,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632731981] [2022-11-20 11:09:38,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632731981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:38,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661637266] [2022-11-20 11:09:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:38,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:38,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:38,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:38,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:09:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:38,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 11:09:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:38,651 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:09:38,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 11:09:38,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:09:38,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:09:39,637 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-20 11:09:39,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 43 [2022-11-20 11:09:39,653 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-20 11:09:39,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-11-20 11:09:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:39,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:40,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 122 [2022-11-20 11:09:40,992 INFO L321 Elim1Store]: treesize reduction 37, result has 66.7 percent of original size [2022-11-20 11:09:40,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 287 [2022-11-20 11:09:41,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:41,610 INFO L321 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2022-11-20 11:09:41,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 259 [2022-11-20 11:09:41,788 INFO L321 Elim1Store]: treesize reduction 37, result has 66.7 percent of original size [2022-11-20 11:09:41,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 560 treesize of output 535 [2022-11-20 11:09:52,929 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 41 treesize of output 37 [2022-11-20 11:09:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:53,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661637266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:09:53,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:09:53,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 16] total 51 [2022-11-20 11:09:53,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065968367] [2022-11-20 11:09:53,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:53,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:09:53,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:53,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:09:53,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2482, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 11:09:53,163 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 52 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:57,010 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2022-11-20 11:09:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:09:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 52 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 11:09:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:57,016 INFO L225 Difference]: With dead ends: 160 [2022-11-20 11:09:57,016 INFO L226 Difference]: Without dead ends: 160 [2022-11-20 11:09:57,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=736, Invalid=4234, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 11:09:57,019 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1149 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:57,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 845 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 979 Invalid, 0 Unknown, 243 Unchecked, 0.9s Time] [2022-11-20 11:09:57,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-20 11:09:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 80. [2022-11-20 11:09:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.328358208955224) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-11-20 11:09:57,023 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 34 [2022-11-20 11:09:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:57,024 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-11-20 11:09:57,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 52 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:09:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-11-20 11:09:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:09:57,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:57,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:57,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:57,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:57,231 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:09:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash -366548793, now seen corresponding path program 1 times [2022-11-20 11:09:57,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:57,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013398062] [2022-11-20 11:09:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:57,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013398062] [2022-11-20 11:09:58,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013398062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365970157] [2022-11-20 11:09:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:58,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:58,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:58,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:58,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:09:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:58,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 11:09:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:58,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:09:58,356 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:09:58,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:09:58,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:09:59,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 11:09:59,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 11:09:59,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:59,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:09:59,450 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:59,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 19 [2022-11-20 11:09:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:09:59,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:59,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2022-11-20 11:10:00,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:00,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 184 [2022-11-20 11:10:00,749 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 11:10:00,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 1 [2022-11-20 11:10:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365970157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:00,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:00,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 43 [2022-11-20 11:10:00,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110329829] [2022-11-20 11:10:00,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 11:10:00,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 11:10:00,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1761, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 11:10:00,754 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:02,137 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-11-20 11:10:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:10:02,138 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 11:10:02,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:02,139 INFO L225 Difference]: With dead ends: 86 [2022-11-20 11:10:02,139 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 11:10:02,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:10:02,142 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 62 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:02,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 589 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 541 Invalid, 0 Unknown, 447 Unchecked, 0.4s Time] [2022-11-20 11:10:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 11:10:02,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-11-20 11:10:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.3134328358208955) internal successors, (88), 79 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-11-20 11:10:02,152 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 34 [2022-11-20 11:10:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:02,152 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-11-20 11:10:02,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 44 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-11-20 11:10:02,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:10:02,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:02,154 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:02,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:02,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:02,360 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:10:02,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:02,361 INFO L85 PathProgramCache]: Analyzing trace with hash -66070095, now seen corresponding path program 1 times [2022-11-20 11:10:02,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:02,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329879538] [2022-11-20 11:10:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:02,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:10:02,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329879538] [2022-11-20 11:10:02,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329879538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:02,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800665041] [2022-11-20 11:10:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:02,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:02,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:02,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:02,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:10:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:02,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:10:02,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:02,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 11:10:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:10:02,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:10:02,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800665041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:02,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:02,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 11 [2022-11-20 11:10:02,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976787587] [2022-11-20 11:10:02,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:02,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:10:02,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:10:02,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:10:02,877 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:03,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:03,492 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-11-20 11:10:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:10:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 11:10:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:03,493 INFO L225 Difference]: With dead ends: 94 [2022-11-20 11:10:03,493 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 11:10:03,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:10:03,494 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 222 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:03,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 209 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:10:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 11:10:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2022-11-20 11:10:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 78 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-11-20 11:10:03,497 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 36 [2022-11-20 11:10:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:03,497 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-11-20 11:10:03,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-11-20 11:10:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:10:03,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:03,501 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:03,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:03,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:10:03,708 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:10:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash -66070094, now seen corresponding path program 1 times [2022-11-20 11:10:03,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:03,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698387003] [2022-11-20 11:10:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:03,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:10:04,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698387003] [2022-11-20 11:10:04,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698387003] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867096590] [2022-11-20 11:10:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:04,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:04,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:04,151 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:04,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:10:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:04,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:10:04,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:04,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 11:10:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:10:04,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:10:04,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867096590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:04,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:04,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 3, 3] total 13 [2022-11-20 11:10:04,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468170654] [2022-11-20 11:10:04,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:04,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:10:04,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:04,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:10:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:10:04,471 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:05,625 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2022-11-20 11:10:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:10:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 11:10:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:05,627 INFO L225 Difference]: With dead ends: 111 [2022-11-20 11:10:05,627 INFO L226 Difference]: Without dead ends: 111 [2022-11-20 11:10:05,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:10:05,628 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 503 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:05,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 209 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:10:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-20 11:10:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 78. [2022-11-20 11:10:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 77 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-11-20 11:10:05,632 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 36 [2022-11-20 11:10:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:05,632 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-11-20 11:10:05,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-11-20 11:10:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:10:05,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:05,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:05,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:05,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:05,840 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:10:05,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:05,840 INFO L85 PathProgramCache]: Analyzing trace with hash -897341486, now seen corresponding path program 1 times [2022-11-20 11:10:05,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:05,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738728838] [2022-11-20 11:10:05,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:05,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:10:05,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:05,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738728838] [2022-11-20 11:10:05,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738728838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:10:05,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:10:05,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:10:05,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159408597] [2022-11-20 11:10:05,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:10:05,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:10:05,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:05,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:10:05,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:10:05,938 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:06,001 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-11-20 11:10:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:10:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 11:10:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:06,003 INFO L225 Difference]: With dead ends: 83 [2022-11-20 11:10:06,003 INFO L226 Difference]: Without dead ends: 83 [2022-11-20 11:10:06,003 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 [2022-11-20 11:10:06,004 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:06,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 42 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:10:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-20 11:10:06,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-20 11:10:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.25) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-11-20 11:10:06,008 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 36 [2022-11-20 11:10:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:06,009 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-11-20 11:10:06,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-11-20 11:10:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:10:06,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:06,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:06,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 11:10:06,011 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:10:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:06,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2047782270, now seen corresponding path program 1 times [2022-11-20 11:10:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:06,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477321610] [2022-11-20 11:10:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:06,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:06,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:06,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477321610] [2022-11-20 11:10:06,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477321610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:06,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522452686] [2022-11-20 11:10:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:06,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:06,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:06,724 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:06,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:10:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:06,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 11:10:06,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:07,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:10:07,438 INFO L321 Elim1Store]: treesize reduction 4, result has 88.6 percent of original size [2022-11-20 11:10:07,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2022-11-20 11:10:07,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 11:10:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:07,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:07,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-20 11:10:07,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:07,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 139 [2022-11-20 11:10:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:08,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522452686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:08,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:08,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 40 [2022-11-20 11:10:08,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974375595] [2022-11-20 11:10:08,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:08,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 11:10:08,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 11:10:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:10:08,168 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:09,627 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-11-20 11:10:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:10:09,637 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-20 11:10:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:09,637 INFO L225 Difference]: With dead ends: 94 [2022-11-20 11:10:09,637 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 11:10:09,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=644, Invalid=2662, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:10:09,645 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 764 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:09,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 517 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 530 Invalid, 0 Unknown, 86 Unchecked, 0.4s Time] [2022-11-20 11:10:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 11:10:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-11-20 11:10:09,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 79 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:09,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-20 11:10:09,651 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 37 [2022-11-20 11:10:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:09,651 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-20 11:10:09,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:09,652 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-20 11:10:09,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:10:09,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:09,652 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:09,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 11:10:09,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:09,858 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:10:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:09,859 INFO L85 PathProgramCache]: Analyzing trace with hash 931150289, now seen corresponding path program 1 times [2022-11-20 11:10:09,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:09,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799023477] [2022-11-20 11:10:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:09,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:09,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799023477] [2022-11-20 11:10:11,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799023477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122464222] [2022-11-20 11:10:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:11,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:11,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:11,079 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:11,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:10:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:11,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 11:10:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:11,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:10:11,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-20 11:10:12,030 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:12,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-11-20 11:10:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:12,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:12,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-20 11:10:12,649 INFO L321 Elim1Store]: treesize reduction 13, result has 62.9 percent of original size [2022-11-20 11:10:12,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 109 [2022-11-20 11:10:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:12,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122464222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:10:12,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:10:12,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 14] total 41 [2022-11-20 11:10:12,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848885797] [2022-11-20 11:10:12,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:12,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 11:10:12,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 11:10:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 11:10:12,790 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:14,923 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2022-11-20 11:10:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:10:14,924 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 11:10:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:14,925 INFO L225 Difference]: With dead ends: 95 [2022-11-20 11:10:14,925 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 11:10:14,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=455, Invalid=2967, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 11:10:14,927 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 212 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:14,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 694 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 973 Invalid, 0 Unknown, 98 Unchecked, 0.8s Time] [2022-11-20 11:10:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 11:10:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2022-11-20 11:10:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2022-11-20 11:10:14,930 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 38 [2022-11-20 11:10:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:14,931 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2022-11-20 11:10:14,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 42 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:10:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2022-11-20 11:10:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 11:10:14,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:14,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:10:14,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:15,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:15,133 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:10:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:15,133 INFO L85 PathProgramCache]: Analyzing trace with hash 931202878, now seen corresponding path program 2 times [2022-11-20 11:10:15,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:15,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984099525] [2022-11-20 11:10:15,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:15,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:16,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:16,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984099525] [2022-11-20 11:10:16,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984099525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:16,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111079019] [2022-11-20 11:10:16,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:10:16,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:16,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:16,792 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:16,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:10:17,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:10:17,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:17,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 11:10:17,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:17,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:10:17,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:10:17,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:10:17,386 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:10:17,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:10:17,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:10:17,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:10:17,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:10:17,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:10:17,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-20 11:10:17,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-20 11:10:18,739 INFO L321 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2022-11-20 11:10:18,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 97 [2022-11-20 11:10:18,760 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-20 11:10:18,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 54 [2022-11-20 11:10:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:18,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:21,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:21,354 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-11-20 11:10:21,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:21,362 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 78 [2022-11-20 11:10:21,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:21,390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 93 [2022-11-20 11:10:21,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:21,399 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 78 [2022-11-20 11:10:21,419 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_4)) (.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_3))) (let ((.cse0 (select (select .cse2 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse1 (+ (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse0)) (not (= (select v_arrayElimArr_4 .cse1) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (= (select (select .cse2 (select (select .cse2 .cse0) .cse1)) (+ (select (select .cse3 .cse0) .cse1) 4)) 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select v_arrayElimArr_3 .cse1))))))) (forall ((v_arrayElimArr_2 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_2)) (.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_1))) (let ((.cse4 (select (select .cse7 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse5 (+ (select (select .cse6 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse4)) (not (= (select v_arrayElimArr_1 .cse5) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (= (select (select .cse6 (select (select .cse7 .cse4) .cse5)) (+ (select (select .cse6 .cse4) .cse5) 4)) 0) (not (= (select v_arrayElimArr_2 .cse5) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))))))) is different from false [2022-11-20 11:10:22,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:22,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 120 [2022-11-20 11:10:22,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:22,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 99 [2022-11-20 11:10:22,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:22,347 INFO L321 Elim1Store]: treesize reduction 53, result has 76.1 percent of original size [2022-11-20 11:10:22,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 324 treesize of output 412 [2022-11-20 11:10:22,826 INFO L321 Elim1Store]: treesize reduction 58, result has 82.4 percent of original size [2022-11-20 11:10:22,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 1110 treesize of output 1078 [2022-11-20 11:10:22,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:22,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 942 treesize of output 856 [2022-11-20 11:10:23,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:23,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 839 treesize of output 809 [2022-11-20 11:12:25,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:25,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 110 [2022-11-20 11:12:25,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:25,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 99 [2022-11-20 11:12:25,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:25,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:25,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 220 [2022-11-20 11:12:28,251 INFO L321 Elim1Store]: treesize reduction 297, result has 78.8 percent of original size [2022-11-20 11:12:28,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 78 case distinctions, treesize of input 690 treesize of output 1510 [2022-11-20 11:12:28,602 INFO L321 Elim1Store]: treesize reduction 12, result has 91.2 percent of original size [2022-11-20 11:12:28,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1089 treesize of output 957 [2022-11-20 11:12:28,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:28,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 1002 treesize of output 662 [2022-11-20 11:18:55,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-20 11:18:55,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111079019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:55,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:55,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 22] total 59 [2022-11-20 11:18:55,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472422456] [2022-11-20 11:18:55,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:55,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 11:18:55,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:55,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 11:18:55,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3146, Unknown=2, NotChecked=112, Total=3422 [2022-11-20 11:18:55,278 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 59 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:59,213 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-11-20 11:18:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:18:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-20 11:18:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:59,215 INFO L225 Difference]: With dead ends: 106 [2022-11-20 11:18:59,215 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 11:18:59,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=374, Invalid=5178, Unknown=2, NotChecked=146, Total=5700 [2022-11-20 11:18:59,218 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 122 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:59,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 993 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 727 Invalid, 0 Unknown, 448 Unchecked, 0.7s Time] [2022-11-20 11:18:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 11:18:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2022-11-20 11:18:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 103 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2022-11-20 11:18:59,225 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 38 [2022-11-20 11:18:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:59,225 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2022-11-20 11:18:59,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.7627118644067796) internal successors, (104), 59 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:18:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2022-11-20 11:18:59,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:18:59,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:59,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:59,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:59,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 11:18:59,434 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:18:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:59,435 INFO L85 PathProgramCache]: Analyzing trace with hash 685031799, now seen corresponding path program 1 times [2022-11-20 11:18:59,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:59,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583824672] [2022-11-20 11:18:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:59,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:18:59,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:59,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583824672] [2022-11-20 11:18:59,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583824672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:59,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059846719] [2022-11-20 11:18:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:59,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:59,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:59,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:59,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:18:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:59,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:18:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:18:59,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:19:00,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059846719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:00,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:00,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-20 11:19:00,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496340745] [2022-11-20 11:19:00,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:00,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:19:00,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:00,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:19:00,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:19:00,035 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:00,079 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2022-11-20 11:19:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:19:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 11:19:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:00,081 INFO L225 Difference]: With dead ends: 119 [2022-11-20 11:19:00,081 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 11:19:00,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:19:00,082 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 115 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:00,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 138 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:19:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 11:19:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-11-20 11:19:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:00,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2022-11-20 11:19:00,086 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 43 [2022-11-20 11:19:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:00,086 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2022-11-20 11:19:00,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2022-11-20 11:19:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:19:00,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:00,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:00,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:00,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:19:00,295 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:19:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:00,295 INFO L85 PathProgramCache]: Analyzing trace with hash 685031799, now seen corresponding path program 1 times [2022-11-20 11:19:00,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:00,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642689219] [2022-11-20 11:19:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:00,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:19:00,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:00,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642689219] [2022-11-20 11:19:00,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642689219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:00,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797311753] [2022-11-20 11:19:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:00,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:00,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:00,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:00,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:19:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:19:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:00,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:19:00,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 11:19:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:19:00,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:01,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:19:01,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:19:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:19:01,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797311753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:19:01,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:19:01,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-11-20 11:19:01,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703085062] [2022-11-20 11:19:01,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:01,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:19:01,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:01,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:19:01,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:19:01,114 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 14 states, 13 states have (on average 5.461538461538462) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:01,281 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2022-11-20 11:19:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:19:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.461538461538462) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-20 11:19:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:01,282 INFO L225 Difference]: With dead ends: 116 [2022-11-20 11:19:01,282 INFO L226 Difference]: Without dead ends: 116 [2022-11-20 11:19:01,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:19:01,283 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 202 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:01,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 90 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:19:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-20 11:19:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2022-11-20 11:19:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.202020202020202) internal successors, (119), 107 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2022-11-20 11:19:01,295 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 43 [2022-11-20 11:19:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:01,295 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2022-11-20 11:19:01,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.461538461538462) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:19:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2022-11-20 11:19:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:19:01,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:01,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:01,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:01,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:19:01,505 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-20 11:19:01,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash -238850691, now seen corresponding path program 1 times [2022-11-20 11:19:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:01,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12612325] [2022-11-20 11:19:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:01,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:03,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:03,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12612325] [2022-11-20 11:19:03,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12612325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:03,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003964770] [2022-11-20 11:19:03,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:03,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:03,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:03,409 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:03,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b548ded7-06c0-421b-8527-26ae44d6b66a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:19:03,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-20 11:19:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:03,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:19:03,711 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:19:03,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-20 11:19:04,102 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-20 11:19:04,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 11:19:04,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:19:05,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2022-11-20 11:19:06,780 INFO L321 Elim1Store]: treesize reduction 139, result has 44.4 percent of original size [2022-11-20 11:19:06,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 136 treesize of output 165 [2022-11-20 11:19:11,681 INFO L321 Elim1Store]: treesize reduction 118, result has 39.2 percent of original size [2022-11-20 11:19:11,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 149 treesize of output 210 [2022-11-20 11:19:14,517 INFO L321 Elim1Store]: treesize reduction 194, result has 38.4 percent of original size [2022-11-20 11:19:14,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 267 treesize of output 231 [2022-11-20 11:19:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:19:18,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:19,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2022-11-20 11:19:22,715 INFO L321 Elim1Store]: treesize reduction 132, result has 71.1 percent of original size [2022-11-20 11:19:22,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 45 case distinctions, treesize of input 1887 treesize of output 1842