./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/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_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/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_47f88f8b-8aff-4a2b-904b-c9afe0961011/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 ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 --- 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 11:37:24,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:37:24,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:37:24,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:37:24,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:37:24,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:37:24,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:37:24,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:37:24,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:37:24,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:37:24,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:37:24,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:37:24,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:37:24,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:37:24,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:37:24,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:37:24,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:37:24,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:37:24,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:37:24,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:37:24,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:37:24,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:37:24,298 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:37:24,299 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:37:24,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:37:24,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:37:24,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:37:24,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:37:24,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:37:24,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:37:24,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:37:24,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:37:24,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:37:24,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:37:24,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:37:24,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:37:24,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:37:24,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:37:24,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:37:24,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:37:24,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:37:24,322 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:37:24,357 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:37:24,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:37:24,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:37:24,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:37:24,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:37:24,359 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:37:24,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:37:24,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:37:24,360 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:37:24,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:37:24,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:37:24,362 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:37:24,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:37:24,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:37:24,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:37:24,363 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:37:24,363 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:37:24,363 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:37:24,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:37:24,364 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:37:24,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:37:24,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:37:24,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:37:24,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:37:24,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:37:24,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:37:24,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:37:24,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:37:24,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:37:24,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:37:24,366 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_47f88f8b-8aff-4a2b-904b-c9afe0961011/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebb6bba6491ab996b2a2d1f88baf86906cd5ba5ce7e0ad4dc20017ded9089a97 [2022-11-20 11:37:24,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:37:24,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:37:24,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:37:24,701 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:37:24,701 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:37:24,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-11-20 11:37:27,669 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:37:27,874 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:37:27,875 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c [2022-11-20 11:37:27,886 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/data/da8ec7474/7ce9c0c462814fa3bba1c94ac21efcde/FLAG5f2bb6bde [2022-11-20 11:37:27,901 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/data/da8ec7474/7ce9c0c462814fa3bba1c94ac21efcde [2022-11-20 11:37:27,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:37:27,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:37:27,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:37:27,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:37:27,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:37:27,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:27" (1/1) ... [2022-11-20 11:37:27,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8e59e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:27, skipping insertion in model container [2022-11-20 11:37:27,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:37:27" (1/1) ... [2022-11-20 11:37:27,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:37:27,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:37:28,188 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_47f88f8b-8aff-4a2b-904b-c9afe0961011/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c[2237,2250] [2022-11-20 11:37:28,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:37:28,212 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:37:28,251 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_47f88f8b-8aff-4a2b-904b-c9afe0961011/sv-benchmarks/c/weaver/bench-exp2x3.wvr.c[2237,2250] [2022-11-20 11:37:28,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:37:28,270 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:37:28,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28 WrapperNode [2022-11-20 11:37:28,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:37:28,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:37:28,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:37:28,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:37:28,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,332 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-11-20 11:37:28,332 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:37:28,333 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:37:28,333 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:37:28,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:37:28,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,365 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,378 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:37:28,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:37:28,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:37:28,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:37:28,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (1/1) ... [2022-11-20 11:37:28,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:37:28,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:28,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:37:28,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:37:28,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:37:28,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:37:28,472 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:37:28,472 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:37:28,473 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:37:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 11:37:28,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 11:37:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-20 11:37:28,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-20 11:37:28,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:37:28,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:37:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:37:28,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:37:28,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:37:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:37:28,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:37:28,478 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:37:28,603 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:37:28,605 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:37:28,957 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:37:28,965 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:37:28,965 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 11:37:28,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:28 BoogieIcfgContainer [2022-11-20 11:37:28,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:37:28,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:37:28,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:37:28,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:37:28,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:37:27" (1/3) ... [2022-11-20 11:37:28,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b3788b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:28, skipping insertion in model container [2022-11-20 11:37:28,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:37:28" (2/3) ... [2022-11-20 11:37:28,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b3788b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:37:28, skipping insertion in model container [2022-11-20 11:37:28,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:37:28" (3/3) ... [2022-11-20 11:37:28,979 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x3.wvr.c [2022-11-20 11:37:29,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:37:29,021 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-20 11:37:29,021 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:37:29,176 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 11:37:29,218 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:37:29,236 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 145 transitions, 322 flow [2022-11-20 11:37:29,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 145 transitions, 322 flow [2022-11-20 11:37:29,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 145 transitions, 322 flow [2022-11-20 11:37:29,327 INFO L130 PetriNetUnfolder]: 10/141 cut-off events. [2022-11-20 11:37:29,327 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 11:37:29,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 141 events. 10/141 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-11-20 11:37:29,335 INFO L119 LiptonReduction]: Number of co-enabled transitions 1608 [2022-11-20 11:37:36,373 INFO L134 LiptonReduction]: Checked pairs total: 2312 [2022-11-20 11:37:36,374 INFO L136 LiptonReduction]: Total number of compositions: 142 [2022-11-20 11:37:36,382 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 47 transitions, 126 flow [2022-11-20 11:37:36,416 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 11:37:36,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:37:36,439 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;@49406c4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:37:36,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-20 11:37:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 0 states 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 11:37:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 11:37:36,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:36,447 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 11:37:36,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:36,453 INFO L85 PathProgramCache]: Analyzing trace with hash 530, now seen corresponding path program 1 times [2022-11-20 11:37:36,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:36,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885766830] [2022-11-20 11:37:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:36,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:36,550 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 11:37:36,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:36,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885766830] [2022-11-20 11:37:36,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885766830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:36,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:36,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 11:37:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945442496] [2022-11-20 11:37:36,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:36,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:37:36,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:37:36,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:36,582 INFO L87 Difference]: Start difference. First operand has 183 states, 165 states have (on average 4.212121212121212) internal successors, (695), 182 states have internal predecessors, (695), 0 states have call successors, (0), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states 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 11:37:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:36,686 INFO L93 Difference]: Finished difference Result 180 states and 692 transitions. [2022-11-20 11:37:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:37:36,688 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-11-20 11:37:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:36,704 INFO L225 Difference]: With dead ends: 180 [2022-11-20 11:37:36,704 INFO L226 Difference]: Without dead ends: 180 [2022-11-20 11:37:36,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:37:36,710 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:36,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-20 11:37:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-20 11:37:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 165 states have (on average 4.193939393939394) internal successors, (692), 179 states have internal predecessors, (692), 0 states have call successors, (0), 0 states 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 11:37:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 692 transitions. [2022-11-20 11:37:36,766 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 692 transitions. Word has length 1 [2022-11-20 11:37:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:36,766 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 692 transitions. [2022-11-20 11:37:36,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states 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 11:37:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 692 transitions. [2022-11-20 11:37:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:37:36,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:36,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:37:36,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:37:36,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:36,769 INFO L85 PathProgramCache]: Analyzing trace with hash 522660, now seen corresponding path program 1 times [2022-11-20 11:37:36,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:36,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910527408] [2022-11-20 11:37:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:36,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:37,212 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 11:37:37,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:37,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910527408] [2022-11-20 11:37:37,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910527408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:37,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:37,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:37:37,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566229117] [2022-11-20 11:37:37,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:37,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:37,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:37,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:37,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:37,222 INFO L87 Difference]: Start difference. First operand 180 states and 692 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 11:37:37,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:37,303 INFO L93 Difference]: Finished difference Result 170 states and 656 transitions. [2022-11-20 11:37:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:37,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-20 11:37:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:37,313 INFO L225 Difference]: With dead ends: 170 [2022-11-20 11:37:37,313 INFO L226 Difference]: Without dead ends: 170 [2022-11-20 11:37:37,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 11:37:37,315 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:37,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-20 11:37:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-11-20 11:37:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 157 states have (on average 4.178343949044586) internal successors, (656), 169 states have internal predecessors, (656), 0 states have call successors, (0), 0 states 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 11:37:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 656 transitions. [2022-11-20 11:37:37,340 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 656 transitions. Word has length 3 [2022-11-20 11:37:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:37,340 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 656 transitions. [2022-11-20 11:37:37,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 11:37:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 656 transitions. [2022-11-20 11:37:37,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:37:37,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:37,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:37:37,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:37:37,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:37,344 INFO L85 PathProgramCache]: Analyzing trace with hash 522658, now seen corresponding path program 1 times [2022-11-20 11:37:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:37,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882691209] [2022-11-20 11:37:37,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:37,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:37,513 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 11:37:37,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:37,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882691209] [2022-11-20 11:37:37,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882691209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:37,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:37,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:37:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879144099] [2022-11-20 11:37:37,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:37,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:37,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:37,516 INFO L87 Difference]: Start difference. First operand 170 states and 656 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 11:37:37,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:37,585 INFO L93 Difference]: Finished difference Result 160 states and 620 transitions. [2022-11-20 11:37:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:37,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-11-20 11:37:37,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:37,587 INFO L225 Difference]: With dead ends: 160 [2022-11-20 11:37:37,587 INFO L226 Difference]: Without dead ends: 160 [2022-11-20 11:37:37,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 11:37:37,589 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:37,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-20 11:37:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-20 11:37:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 149 states have (on average 4.1610738255033555) internal successors, (620), 159 states have internal predecessors, (620), 0 states have call successors, (0), 0 states 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 11:37:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 620 transitions. [2022-11-20 11:37:37,599 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 620 transitions. Word has length 3 [2022-11-20 11:37:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:37,600 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 620 transitions. [2022-11-20 11:37:37,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states 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 11:37:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 620 transitions. [2022-11-20 11:37:37,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:37:37,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:37,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:37:37,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:37:37,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:37,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash 502286591, now seen corresponding path program 1 times [2022-11-20 11:37:37,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:37,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817450152] [2022-11-20 11:37:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:37,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:37,666 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 11:37:37,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817450152] [2022-11-20 11:37:37,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817450152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:37,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:37,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:37:37,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146186953] [2022-11-20 11:37:37,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:37,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:37,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:37,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:37,669 INFO L87 Difference]: Start difference. First operand 160 states and 620 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 11:37:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:37,720 INFO L93 Difference]: Finished difference Result 152 states and 596 transitions. [2022-11-20 11:37:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 11:37:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:37,722 INFO L225 Difference]: With dead ends: 152 [2022-11-20 11:37:37,723 INFO L226 Difference]: Without dead ends: 152 [2022-11-20 11:37:37,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 11:37:37,724 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:37,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:37,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-20 11:37:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-20 11:37:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 143 states have (on average 4.1678321678321675) internal successors, (596), 151 states have internal predecessors, (596), 0 states have call successors, (0), 0 states 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 11:37:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 596 transitions. [2022-11-20 11:37:37,734 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 596 transitions. Word has length 5 [2022-11-20 11:37:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:37,734 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 596 transitions. [2022-11-20 11:37:37,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 11:37:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 596 transitions. [2022-11-20 11:37:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 11:37:37,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:37,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 11:37:37,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:37:37,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash 502286593, now seen corresponding path program 1 times [2022-11-20 11:37:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:37,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044912543] [2022-11-20 11:37:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:37,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:37,867 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 11:37:37,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:37,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044912543] [2022-11-20 11:37:37,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044912543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:37,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:37,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:37:37,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189385644] [2022-11-20 11:37:37,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:37,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:37,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:37,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:37,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:37,869 INFO L87 Difference]: Start difference. First operand 152 states and 596 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 11:37:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:37,918 INFO L93 Difference]: Finished difference Result 144 states and 572 transitions. [2022-11-20 11:37:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 11:37:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:37,920 INFO L225 Difference]: With dead ends: 144 [2022-11-20 11:37:37,920 INFO L226 Difference]: Without dead ends: 144 [2022-11-20 11:37:37,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 11:37:37,921 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:37,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-20 11:37:37,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-11-20 11:37:37,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 4.175182481751825) internal successors, (572), 143 states have internal predecessors, (572), 0 states have call successors, (0), 0 states 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 11:37:37,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 572 transitions. [2022-11-20 11:37:37,929 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 572 transitions. Word has length 5 [2022-11-20 11:37:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:37,930 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 572 transitions. [2022-11-20 11:37:37,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 11:37:37,930 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 572 transitions. [2022-11-20 11:37:37,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:37:37,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:37,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:37,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:37:37,931 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:37,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1661089233, now seen corresponding path program 1 times [2022-11-20 11:37:37,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:37,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442808248] [2022-11-20 11:37:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:37,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:38,032 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 11:37:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:38,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442808248] [2022-11-20 11:37:38,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442808248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:38,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:38,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:37:38,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696181525] [2022-11-20 11:37:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:38,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:38,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:38,035 INFO L87 Difference]: Start difference. First operand 144 states and 572 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 11:37:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:38,080 INFO L93 Difference]: Finished difference Result 134 states and 536 transitions. [2022-11-20 11:37:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 11:37:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:38,083 INFO L225 Difference]: With dead ends: 134 [2022-11-20 11:37:38,083 INFO L226 Difference]: Without dead ends: 134 [2022-11-20 11:37:38,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 11:37:38,090 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:38,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-20 11:37:38,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-20 11:37:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 4.155038759689923) internal successors, (536), 133 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 536 transitions. [2022-11-20 11:37:38,096 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 536 transitions. Word has length 7 [2022-11-20 11:37:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:38,098 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 536 transitions. [2022-11-20 11:37:38,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 11:37:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 536 transitions. [2022-11-20 11:37:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:37:38,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:38,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:38,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:37:38,100 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1661089235, now seen corresponding path program 1 times [2022-11-20 11:37:38,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:38,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330516229] [2022-11-20 11:37:38,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:38,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:38,207 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 11:37:38,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:38,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330516229] [2022-11-20 11:37:38,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330516229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:38,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:38,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:37:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186102077] [2022-11-20 11:37:38,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:38,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:38,209 INFO L87 Difference]: Start difference. First operand 134 states and 536 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 11:37:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:38,265 INFO L93 Difference]: Finished difference Result 124 states and 500 transitions. [2022-11-20 11:37:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 11:37:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:38,267 INFO L225 Difference]: With dead ends: 124 [2022-11-20 11:37:38,267 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 11:37:38,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 11:37:38,268 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:38,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 11:37:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-20 11:37:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 121 states have (on average 4.132231404958677) internal successors, (500), 123 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 11:37:38,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 500 transitions. [2022-11-20 11:37:38,274 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 500 transitions. Word has length 7 [2022-11-20 11:37:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:38,274 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 500 transitions. [2022-11-20 11:37:38,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 11:37:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 500 transitions. [2022-11-20 11:37:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:37:38,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:38,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:38,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:37:38,276 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:38,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:38,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1421068908, now seen corresponding path program 1 times [2022-11-20 11:37:38,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:38,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665386336] [2022-11-20 11:37:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:38,483 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 11:37:38,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:38,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665386336] [2022-11-20 11:37:38,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665386336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:38,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:38,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:37:38,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855611441] [2022-11-20 11:37:38,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:37:38,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:37:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:37:38,485 INFO L87 Difference]: Start difference. First operand 124 states and 500 transitions. Second operand has 6 states, 5 states have (on average 1.8) 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 11:37:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:38,543 INFO L93 Difference]: Finished difference Result 108 states and 420 transitions. [2022-11-20 11:37:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) 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 11:37:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:38,545 INFO L225 Difference]: With dead ends: 108 [2022-11-20 11:37:38,545 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 11:37:38,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:37:38,546 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:38,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 11:37:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-11-20 11:37:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 3.9622641509433962) internal successors, (420), 107 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 11:37:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 420 transitions. [2022-11-20 11:37:38,551 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 420 transitions. Word has length 9 [2022-11-20 11:37:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:38,552 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 420 transitions. [2022-11-20 11:37:38,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) 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 11:37:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 420 transitions. [2022-11-20 11:37:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:37:38,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:38,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:38,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:37:38,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1421068907, now seen corresponding path program 1 times [2022-11-20 11:37:38,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:38,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574129024] [2022-11-20 11:37:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:38,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:38,880 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 11:37:38,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:38,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574129024] [2022-11-20 11:37:38,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574129024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:38,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:38,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:37:38,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033784122] [2022-11-20 11:37:38,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:38,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:37:38,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:38,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:37:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:37:38,882 INFO L87 Difference]: Start difference. First operand 108 states and 420 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:38,962 INFO L93 Difference]: Finished difference Result 92 states and 340 transitions. [2022-11-20 11:37:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 11:37:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:38,964 INFO L225 Difference]: With dead ends: 92 [2022-11-20 11:37:38,964 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 11:37:38,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:37:38,965 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:38,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:37:38,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 11:37:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-20 11:37:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 3.7362637362637363) internal successors, (340), 91 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 11:37:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 340 transitions. [2022-11-20 11:37:38,970 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 340 transitions. Word has length 9 [2022-11-20 11:37:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:38,970 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 340 transitions. [2022-11-20 11:37:38,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 340 transitions. [2022-11-20 11:37:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 11:37:38,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:38,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:38,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:37:38,972 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:38,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1965251127, now seen corresponding path program 1 times [2022-11-20 11:37:38,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:38,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417034340] [2022-11-20 11:37:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:38,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:39,308 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 11:37:39,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:39,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417034340] [2022-11-20 11:37:39,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417034340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:39,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:39,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:37:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450130689] [2022-11-20 11:37:39,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:39,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:37:39,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:37:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:37:39,310 INFO L87 Difference]: Start difference. First operand 92 states and 340 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 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 11:37:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:39,394 INFO L93 Difference]: Finished difference Result 181 states and 677 transitions. [2022-11-20 11:37:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:37:39,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 11:37:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:39,397 INFO L225 Difference]: With dead ends: 181 [2022-11-20 11:37:39,397 INFO L226 Difference]: Without dead ends: 172 [2022-11-20 11:37:39,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 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 11:37:39,398 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:39,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:39,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-20 11:37:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-20 11:37:39,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 3.7953216374269005) internal successors, (649), 171 states have internal predecessors, (649), 0 states have call successors, (0), 0 states 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 11:37:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 649 transitions. [2022-11-20 11:37:39,408 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 649 transitions. Word has length 21 [2022-11-20 11:37:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:39,409 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 649 transitions. [2022-11-20 11:37:39,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 2 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 11:37:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 649 transitions. [2022-11-20 11:37:39,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:37:39,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:39,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:39,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:37:39,416 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash -956035180, now seen corresponding path program 1 times [2022-11-20 11:37:39,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:39,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771330207] [2022-11-20 11:37:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:39,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:39,623 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 11:37:39,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:39,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771330207] [2022-11-20 11:37:39,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771330207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:39,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74699497] [2022-11-20 11:37:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:39,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:39,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:39,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:39,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:37:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:39,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:37:39,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:39,880 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 11:37:39,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:39,987 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 11:37:39,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74699497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:39,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:39,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 11:37:39,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237408478] [2022-11-20 11:37:39,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:39,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:37:39,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:39,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:37:39,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:37:39,989 INFO L87 Difference]: Start difference. First operand 172 states and 649 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 11:37:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:40,312 INFO L93 Difference]: Finished difference Result 336 states and 1249 transitions. [2022-11-20 11:37:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:37:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 11:37:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:40,315 INFO L225 Difference]: With dead ends: 336 [2022-11-20 11:37:40,315 INFO L226 Difference]: Without dead ends: 336 [2022-11-20 11:37:40,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:37:40,316 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:40,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:37:40,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-20 11:37:40,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 216. [2022-11-20 11:37:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 4.027906976744186) internal successors, (866), 215 states have internal predecessors, (866), 0 states have call successors, (0), 0 states 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 11:37:40,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 866 transitions. [2022-11-20 11:37:40,327 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 866 transitions. Word has length 22 [2022-11-20 11:37:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:40,327 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 866 transitions. [2022-11-20 11:37:40,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states 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 11:37:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 866 transitions. [2022-11-20 11:37:40,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:37:40,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:40,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:40,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:37:40,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:37:40,535 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:40,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:40,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1376723819, now seen corresponding path program 1 times [2022-11-20 11:37:40,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:40,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814664811] [2022-11-20 11:37:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:40,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:40,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:40,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814664811] [2022-11-20 11:37:40,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814664811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:40,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:40,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739186213] [2022-11-20 11:37:40,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:40,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:37:40,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:37:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:37:40,799 INFO L87 Difference]: Start difference. First operand 216 states and 866 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 11:37:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:40,941 INFO L93 Difference]: Finished difference Result 220 states and 837 transitions. [2022-11-20 11:37:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:37:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 11:37:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:40,943 INFO L225 Difference]: With dead ends: 220 [2022-11-20 11:37:40,943 INFO L226 Difference]: Without dead ends: 214 [2022-11-20 11:37:40,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:37:40,944 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:40,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-20 11:37:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-11-20 11:37:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 3.835680751173709) internal successors, (817), 213 states have internal predecessors, (817), 0 states have call successors, (0), 0 states 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 11:37:40,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 817 transitions. [2022-11-20 11:37:40,955 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 817 transitions. Word has length 22 [2022-11-20 11:37:40,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:40,955 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 817 transitions. [2022-11-20 11:37:40,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 11:37:40,956 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 817 transitions. [2022-11-20 11:37:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:37:40,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:40,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:40,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:37:40,958 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:40,958 INFO L85 PathProgramCache]: Analyzing trace with hash 720968624, now seen corresponding path program 1 times [2022-11-20 11:37:40,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:40,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703418150] [2022-11-20 11:37:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:40,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:41,187 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 11:37:41,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:41,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703418150] [2022-11-20 11:37:41,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703418150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:41,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436484492] [2022-11-20 11:37:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:41,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:41,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:41,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:37:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:37:41,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:41,889 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 11:37:41,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:41,970 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 11:37:41,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436484492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:41,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:41,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 11:37:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728446036] [2022-11-20 11:37:41,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:41,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:37:41,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:37:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:37:41,973 INFO L87 Difference]: Start difference. First operand 214 states and 817 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:42,295 INFO L93 Difference]: Finished difference Result 418 states and 1611 transitions. [2022-11-20 11:37:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:37:42,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 11:37:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:42,299 INFO L225 Difference]: With dead ends: 418 [2022-11-20 11:37:42,299 INFO L226 Difference]: Without dead ends: 418 [2022-11-20 11:37:42,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:37:42,300 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:42,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:37:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-20 11:37:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 294. [2022-11-20 11:37:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 4.156996587030717) internal successors, (1218), 293 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states 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 11:37:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 1218 transitions. [2022-11-20 11:37:42,317 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 1218 transitions. Word has length 22 [2022-11-20 11:37:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:42,318 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 1218 transitions. [2022-11-20 11:37:42,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:42,318 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 1218 transitions. [2022-11-20 11:37:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:37:42,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:42,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:42,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:42,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:37:42,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash -265551470, now seen corresponding path program 1 times [2022-11-20 11:37:42,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:42,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086529147] [2022-11-20 11:37:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:42,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:42,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:42,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086529147] [2022-11-20 11:37:42,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086529147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:42,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:42,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:42,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128693546] [2022-11-20 11:37:42,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:42,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:37:42,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:37:42,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:37:42,804 INFO L87 Difference]: Start difference. First operand 294 states and 1218 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 11:37:42,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:42,946 INFO L93 Difference]: Finished difference Result 304 states and 1205 transitions. [2022-11-20 11:37:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:37:42,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 11:37:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:42,949 INFO L225 Difference]: With dead ends: 304 [2022-11-20 11:37:42,949 INFO L226 Difference]: Without dead ends: 272 [2022-11-20 11:37:42,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:37:42,950 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:42,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-20 11:37:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-11-20 11:37:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 4.136531365313653) internal successors, (1121), 271 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states 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 11:37:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 1121 transitions. [2022-11-20 11:37:42,960 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 1121 transitions. Word has length 22 [2022-11-20 11:37:42,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:42,961 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 1121 transitions. [2022-11-20 11:37:42,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 11:37:42,961 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 1121 transitions. [2022-11-20 11:37:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:37:42,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:42,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:42,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:37:42,963 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash -614826510, now seen corresponding path program 2 times [2022-11-20 11:37:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:42,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900699312] [2022-11-20 11:37:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:42,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:43,158 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 11:37:43,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:43,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900699312] [2022-11-20 11:37:43,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900699312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:43,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934902045] [2022-11-20 11:37:43,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:37:43,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:43,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:43,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:43,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:37:43,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:37:43,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:37:43,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:37:43,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:37:43,465 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 11:37:43,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:37:43,545 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 11:37:43,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934902045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:37:43,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:37:43,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 11:37:43,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171593681] [2022-11-20 11:37:43,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:37:43,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:37:43,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:43,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:37:43,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:37:43,549 INFO L87 Difference]: Start difference. First operand 272 states and 1121 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:43,811 INFO L93 Difference]: Finished difference Result 428 states and 1675 transitions. [2022-11-20 11:37:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:37:43,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 11:37:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:43,815 INFO L225 Difference]: With dead ends: 428 [2022-11-20 11:37:43,816 INFO L226 Difference]: Without dead ends: 428 [2022-11-20 11:37:43,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:37:43,816 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:43,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:37:43,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-20 11:37:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 316. [2022-11-20 11:37:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 4.174603174603175) internal successors, (1315), 315 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states 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 11:37:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 1315 transitions. [2022-11-20 11:37:43,835 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 1315 transitions. Word has length 22 [2022-11-20 11:37:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:43,836 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 1315 transitions. [2022-11-20 11:37:43,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:37:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 1315 transitions. [2022-11-20 11:37:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 11:37:43,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:43,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:43,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:37:44,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:44,045 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:44,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1740877067, now seen corresponding path program 2 times [2022-11-20 11:37:44,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:44,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199971406] [2022-11-20 11:37:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:44,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:44,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:44,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199971406] [2022-11-20 11:37:44,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199971406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:37:44,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:37:44,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:37:44,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155470487] [2022-11-20 11:37:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:37:44,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:37:44,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:37:44,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:37:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:37:44,207 INFO L87 Difference]: Start difference. First operand 316 states and 1315 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 11:37:44,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:37:44,337 INFO L93 Difference]: Finished difference Result 372 states and 1561 transitions. [2022-11-20 11:37:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:37:44,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 11:37:44,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:37:44,341 INFO L225 Difference]: With dead ends: 372 [2022-11-20 11:37:44,341 INFO L226 Difference]: Without dead ends: 372 [2022-11-20 11:37:44,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:37:44,342 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:37:44,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:37:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-11-20 11:37:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-11-20 11:37:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 4.2075471698113205) internal successors, (1561), 371 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states 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 11:37:44,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1561 transitions. [2022-11-20 11:37:44,355 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1561 transitions. Word has length 22 [2022-11-20 11:37:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:37:44,355 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 1561 transitions. [2022-11-20 11:37:44,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 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 11:37:44,356 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1561 transitions. [2022-11-20 11:37:44,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:37:44,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:37:44,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:37:44,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:37:44,358 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:37:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:37:44,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1742286120, now seen corresponding path program 1 times [2022-11-20 11:37:44,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:37:44,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909101101] [2022-11-20 11:37:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:44,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:37:44,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:37:44,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:37:44,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909101101] [2022-11-20 11:37:44,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909101101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:37:44,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976208676] [2022-11-20 11:37:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:37:44,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:37:44,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:37:44,933 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:37:44,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:37:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:37:45,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:37:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:38:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:05,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:38:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:38:11,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976208676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:38:11,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:38:11,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-20 11:38:11,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939281224] [2022-11-20 11:38:11,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:38:11,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:38:11,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:38:11,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:38:11,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=168, Unknown=7, NotChecked=0, Total=240 [2022-11-20 11:38:11,090 INFO L87 Difference]: Start difference. First operand 372 states and 1561 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:38:13,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:15,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:21,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:25,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:29,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:32,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:33,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:35,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:41,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:48,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:50,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:52,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:54,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:56,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:38:58,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:02,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:03,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:10,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:12,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:17,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:20,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:21,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:24,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:28,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:36,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:38,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:40,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:42,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:45,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:48,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:50,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:52,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:54,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:56,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:39:59,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:03,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:05,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:07,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:09,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:11,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:14,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:16,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:18,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:20,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:22,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:24,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:26,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:29,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:32,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:34,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:36,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:39,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:41,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:43,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:45,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:48,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:40:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:40:48,681 INFO L93 Difference]: Finished difference Result 1259 states and 4845 transitions. [2022-11-20 11:40:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:40:48,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:40:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:40:48,690 INFO L225 Difference]: With dead ends: 1259 [2022-11-20 11:40:48,691 INFO L226 Difference]: Without dead ends: 1214 [2022-11-20 11:40:48,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=153, Invalid=434, Unknown=13, NotChecked=0, Total=600 [2022-11-20 11:40:48,692 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 284 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 56 mSolverCounterUnsat, 42 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 42 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:40:48,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 0 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 924 Invalid, 42 Unknown, 0 Unchecked, 130.2s Time] [2022-11-20 11:40:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-11-20 11:40:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 614. [2022-11-20 11:40:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 4.425774877650897) internal successors, (2713), 613 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states 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 11:40:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2713 transitions. [2022-11-20 11:40:48,723 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2713 transitions. Word has length 23 [2022-11-20 11:40:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:40:48,724 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 2713 transitions. [2022-11-20 11:40:48,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:40:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2713 transitions. [2022-11-20 11:40:48,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:40:48,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:40:48,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:40:48,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:40:48,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:40:48,934 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:40:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:40:48,934 INFO L85 PathProgramCache]: Analyzing trace with hash -953204996, now seen corresponding path program 2 times [2022-11-20 11:40:48,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:40:48,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826238325] [2022-11-20 11:40:48,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:40:48,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:40:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:40:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:40:49,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:40:49,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826238325] [2022-11-20 11:40:49,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826238325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:40:49,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220256629] [2022-11-20 11:40:49,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:40:49,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:40:49,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:40:49,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:40:49,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:40:49,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:40:49,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:40:49,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:40:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:41:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:41:06,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:41:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:41:16,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220256629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:41:16,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:41:16,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-20 11:41:16,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245893080] [2022-11-20 11:41:16,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:41:16,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:41:16,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:41:16,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:41:16,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=159, Unknown=7, NotChecked=0, Total=240 [2022-11-20 11:41:16,465 INFO L87 Difference]: Start difference. First operand 614 states and 2713 transitions. Second operand has 16 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:41:27,769 WARN L233 SmtUtils]: Spent 11.09s on a formula simplification. DAG size of input: 52 DAG size of output: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:41:40,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:41:42,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:41:44,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:41:46,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:41:49,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:41:51,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:41:54,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:41:58,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:00,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:02,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:04,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:06,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:08,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:11,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:15,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:25,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:27,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:29,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:30,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:32,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:37,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:42,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:44,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:46,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:49,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:51,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:52,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:55,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:42:59,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:02,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:07,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:08,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:11,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:14,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:17,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:18,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:21,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:23,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:25,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:43:26,962 INFO L93 Difference]: Finished difference Result 1841 states and 7249 transitions. [2022-11-20 11:43:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:43:26,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:43:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:43:26,974 INFO L225 Difference]: With dead ends: 1841 [2022-11-20 11:43:26,974 INFO L226 Difference]: Without dead ends: 1801 [2022-11-20 11:43:26,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=155, Invalid=433, Unknown=12, NotChecked=0, Total=600 [2022-11-20 11:43:26,975 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 284 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 55 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:43:26,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 0 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1013 Invalid, 30 Unknown, 0 Unchecked, 100.5s Time] [2022-11-20 11:43:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2022-11-20 11:43:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 668. [2022-11-20 11:43:27,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 4.48575712143928) internal successors, (2992), 667 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states 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 11:43:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2992 transitions. [2022-11-20 11:43:27,011 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2992 transitions. Word has length 23 [2022-11-20 11:43:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:43:27,012 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 2992 transitions. [2022-11-20 11:43:27,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2992 transitions. [2022-11-20 11:43:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:43:27,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:43:27,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:27,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:43:27,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:43:27,223 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:43:27,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash -183603399, now seen corresponding path program 1 times [2022-11-20 11:43:27,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753782910] [2022-11-20 11:43:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:27,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:27,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753782910] [2022-11-20 11:43:27,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753782910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:43:27,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188143098] [2022-11-20 11:43:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:27,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:43:27,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:27,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:43:27,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:43:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:28,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:43:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:43:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:42,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:43:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:43:48,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188143098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:43:48,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:43:48,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2022-11-20 11:43:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765196876] [2022-11-20 11:43:48,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:43:48,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:43:48,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:43:48,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=147, Unknown=4, NotChecked=0, Total=210 [2022-11-20 11:43:48,806 INFO L87 Difference]: Start difference. First operand 668 states and 2992 transitions. Second operand has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:43:51,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:54,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:43:56,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:05,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:07,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:12,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:17,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:22,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:44:25,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:44:25,171 INFO L93 Difference]: Finished difference Result 1325 states and 5509 transitions. [2022-11-20 11:44:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:44:25,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:44:25,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:44:25,195 INFO L225 Difference]: With dead ends: 1325 [2022-11-20 11:44:25,195 INFO L226 Difference]: Without dead ends: 1280 [2022-11-20 11:44:25,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=151, Invalid=395, Unknown=6, NotChecked=0, Total=552 [2022-11-20 11:44:25,196 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 236 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 33 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:44:25,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 0 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 555 Invalid, 4 Unknown, 0 Unchecked, 23.4s Time] [2022-11-20 11:44:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-11-20 11:44:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 888. [2022-11-20 11:44:25,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 4.569334836527621) internal successors, (4053), 887 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states 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 11:44:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 4053 transitions. [2022-11-20 11:44:25,233 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 4053 transitions. Word has length 23 [2022-11-20 11:44:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:44:25,233 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 4053 transitions. [2022-11-20 11:44:25,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 4053 transitions. [2022-11-20 11:44:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:44:25,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:44:25,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:44:25,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:44:25,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:25,443 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:44:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:25,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1939483127, now seen corresponding path program 2 times [2022-11-20 11:44:25,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:25,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028606812] [2022-11-20 11:44:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:25,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:26,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:26,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028606812] [2022-11-20 11:44:26,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028606812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:44:26,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503070675] [2022-11-20 11:44:26,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:44:26,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:44:26,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:44:26,095 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:44:26,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:44:26,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:44:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:44:26,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:44:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:44:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:41,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:44:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:44:52,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503070675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:44:52,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:44:52,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2022-11-20 11:44:52,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051940691] [2022-11-20 11:44:52,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:44:52,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:44:52,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:52,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:44:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=138, Unknown=10, NotChecked=0, Total=210 [2022-11-20 11:44:52,873 INFO L87 Difference]: Start difference. First operand 888 states and 4053 transitions. Second operand has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:44:55,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:08,392 WARN L233 SmtUtils]: Spent 11.00s on a formula simplification. DAG size of input: 84 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:45:09,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:12,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:15,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:18,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:21,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:24,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:26,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:28,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:30,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:32,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:36,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:39,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:41,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:43,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:45,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:48,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:50,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:52,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:45:54,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:46:01,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:46:02,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:46:05,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:46:06,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:46:15,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:46:18,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:46:20,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:46:22,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:46:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:28,056 INFO L93 Difference]: Finished difference Result 1685 states and 6996 transitions. [2022-11-20 11:46:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:46:28,057 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:46:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:28,067 INFO L225 Difference]: With dead ends: 1685 [2022-11-20 11:46:28,067 INFO L226 Difference]: Without dead ends: 1644 [2022-11-20 11:46:28,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=153, Invalid=343, Unknown=10, NotChecked=0, Total=506 [2022-11-20 11:46:28,068 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 280 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 39 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:28,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 0 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 705 Invalid, 20 Unknown, 0 Unchecked, 70.2s Time] [2022-11-20 11:46:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-11-20 11:46:28,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1012. [2022-11-20 11:46:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 4.678536102868447) internal successors, (4730), 1011 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states 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 11:46:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 4730 transitions. [2022-11-20 11:46:28,115 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 4730 transitions. Word has length 23 [2022-11-20 11:46:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:28,115 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 4730 transitions. [2022-11-20 11:46:28,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 4730 transitions. [2022-11-20 11:46:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 11:46:28,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:28,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:28,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-20 11:46:28,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:28,325 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:46:28,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -5386664, now seen corresponding path program 3 times [2022-11-20 11:46:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:28,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757725254] [2022-11-20 11:46:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:28,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757725254] [2022-11-20 11:46:28,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757725254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100182907] [2022-11-20 11:46:28,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:46:28,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:28,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:28,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:28,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:46:29,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:46:29,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:46:29,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:46:29,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:41,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:47,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100182907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:47,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:47,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-20 11:46:47,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084310486] [2022-11-20 11:46:47,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:47,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:46:47,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:47,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:46:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=159, Unknown=2, NotChecked=0, Total=240 [2022-11-20 11:46:47,353 INFO L87 Difference]: Start difference. First operand 1012 states and 4730 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:46:54,326 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 54 DAG size of output: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:46:56,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:01,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:04,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:12,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:14,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:17,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:19,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:23,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:27,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:32,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:34,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:41,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:43,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:46,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:54,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:47:55,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:47:55,907 INFO L93 Difference]: Finished difference Result 1680 states and 7203 transitions. [2022-11-20 11:47:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:47:55,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 11:47:55,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:47:55,918 INFO L225 Difference]: With dead ends: 1680 [2022-11-20 11:47:55,918 INFO L226 Difference]: Without dead ends: 1656 [2022-11-20 11:47:55,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=156, Invalid=439, Unknown=5, NotChecked=0, Total=600 [2022-11-20 11:47:55,919 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 306 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 26 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:47:55,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 0 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 750 Invalid, 12 Unknown, 0 Unchecked, 50.3s Time] [2022-11-20 11:47:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2022-11-20 11:47:55,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1086. [2022-11-20 11:47:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 4.707834101382488) internal successors, (5108), 1085 states have internal predecessors, (5108), 0 states have call successors, (0), 0 states 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 11:47:55,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 5108 transitions. [2022-11-20 11:47:55,964 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 5108 transitions. Word has length 23 [2022-11-20 11:47:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:47:55,965 INFO L495 AbstractCegarLoop]: Abstraction has 1086 states and 5108 transitions. [2022-11-20 11:47:55,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:47:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 5108 transitions. [2022-11-20 11:47:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:47:55,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:47:55,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:55,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 11:47:56,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:56,180 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:47:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:56,181 INFO L85 PathProgramCache]: Analyzing trace with hash 764910865, now seen corresponding path program 1 times [2022-11-20 11:47:56,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:56,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866665754] [2022-11-20 11:47:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:56,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:47:56,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:56,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866665754] [2022-11-20 11:47:56,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866665754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:56,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333266992] [2022-11-20 11:47:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:56,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:56,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:56,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:56,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:47:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:56,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:47:56,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:47:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:47:56,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:47:56,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333266992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:47:56,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:47:56,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-20 11:47:56,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644252810] [2022-11-20 11:47:56,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:47:56,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:47:56,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:47:56,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:47:56,676 INFO L87 Difference]: Start difference. First operand 1086 states and 5108 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 11:47:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:47:56,821 INFO L93 Difference]: Finished difference Result 1176 states and 5200 transitions. [2022-11-20 11:47:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:47:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2022-11-20 11:47:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:47:56,829 INFO L225 Difference]: With dead ends: 1176 [2022-11-20 11:47:56,830 INFO L226 Difference]: Without dead ends: 1134 [2022-11-20 11:47:56,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:47:56,831 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:47:56,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:47:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-11-20 11:47:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1081. [2022-11-20 11:47:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 4.548148148148148) internal successors, (4912), 1080 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states 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 11:47:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 4912 transitions. [2022-11-20 11:47:56,867 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 4912 transitions. Word has length 24 [2022-11-20 11:47:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:47:56,867 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 4912 transitions. [2022-11-20 11:47:56,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 11:47:56,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 4912 transitions. [2022-11-20 11:47:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:47:56,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:47:56,872 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:47:56,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 11:47:57,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:57,082 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:47:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:47:57,082 INFO L85 PathProgramCache]: Analyzing trace with hash -524099514, now seen corresponding path program 4 times [2022-11-20 11:47:57,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:47:57,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347263830] [2022-11-20 11:47:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:47:57,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:47:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:47:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:57,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:47:57,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347263830] [2022-11-20 11:47:57,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347263830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:47:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109632065] [2022-11-20 11:47:57,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:47:57,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:47:57,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:47:57,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:47:57,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:47:58,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:47:58,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:47:58,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:47:58,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:03,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:28,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109632065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:28,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:28,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2022-11-20 11:48:28,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479893657] [2022-11-20 11:48:28,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:28,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:48:28,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:28,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:48:28,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=171, Unknown=6, NotChecked=0, Total=240 [2022-11-20 11:48:28,487 INFO L87 Difference]: Start difference. First operand 1081 states and 4912 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:30,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:32,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:34,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:39,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:42,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:43,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:45,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:47,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:54,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:56,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:48:59,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:04,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:08,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:12,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:14,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:16,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:18,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:19,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:22,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:24,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:32,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:34,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:37,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:39,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:43,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:45,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:47,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:48,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:51,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:53,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:55,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:57,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:49:59,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:01,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:03,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:06,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:08,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:12,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:14,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:17,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:19,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:21,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:23,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:25,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:31,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:32,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:34,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:37,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:39,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:47,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:49,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:52,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:54,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:56,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:50:58,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:00,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:03,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:05,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:08,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:09,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:12,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:14,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:16,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:25,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:28,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:30,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:33,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:36,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:37,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:39,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 11:51:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:51:40,735 INFO L93 Difference]: Finished difference Result 3402 states and 13380 transitions. [2022-11-20 11:51:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:51:40,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 11:51:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:51:40,750 INFO L225 Difference]: With dead ends: 3402 [2022-11-20 11:51:40,750 INFO L226 Difference]: Without dead ends: 3368 [2022-11-20 11:51:40,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=165, Invalid=528, Unknown=9, NotChecked=0, Total=702 [2022-11-20 11:51:40,751 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 431 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 45 mSolverCounterUnsat, 54 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 54 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 172.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:51:40,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 0 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1205 Invalid, 54 Unknown, 0 Unchecked, 172.1s Time] [2022-11-20 11:51:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2022-11-20 11:51:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 1227. [2022-11-20 11:51:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 4.741435562805873) internal successors, (5813), 1226 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states 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 11:51:40,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 5813 transitions. [2022-11-20 11:51:40,818 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 5813 transitions. Word has length 24 [2022-11-20 11:51:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:51:40,819 INFO L495 AbstractCegarLoop]: Abstraction has 1227 states and 5813 transitions. [2022-11-20 11:51:40,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:51:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 5813 transitions. [2022-11-20 11:51:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:51:40,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:51:40,824 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:51:40,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:51:41,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:41,031 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-20 11:51:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:51:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1817865205, now seen corresponding path program 5 times [2022-11-20 11:51:41,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:51:41,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727082312] [2022-11-20 11:51:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:51:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:51:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:51:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:41,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:51:41,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727082312] [2022-11-20 11:51:41,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727082312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:51:41,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481694527] [2022-11-20 11:51:41,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:51:41,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:51:41,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:51:41,459 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:51:41,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47f88f8b-8aff-4a2b-904b-c9afe0961011/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:52:17,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 11:52:17,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:52:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:52:17,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:52:34,154 WARN L233 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 6 DAG size of output: 1 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 11:52:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:52:34,172 INFO L328 TraceCheckSpWp]: Computing backward predicates...