./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8 --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 bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- 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-2329fc7 [2022-12-13 18:01:28,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:01:28,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:01:28,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:01:28,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:01:28,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:01:28,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:01:28,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:01:28,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:01:28,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:01:28,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:01:28,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:01:28,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:01:28,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:01:28,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:01:28,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:01:28,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:01:28,153 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:01:28,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:01:28,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:01:28,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:01:28,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:01:28,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:01:28,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:01:28,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:01:28,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:01:28,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:01:28,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:01:28,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:01:28,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:01:28,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:01:28,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:01:28,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:01:28,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:01:28,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:01:28,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:01:28,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:01:28,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:01:28,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:01:28,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:01:28,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:01:28,175 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:01:28,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:01:28,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:01:28,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:01:28,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:01:28,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:01:28,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:01:28,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:01:28,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:01:28,198 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:01:28,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:01:28,199 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:01:28,199 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:01:28,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:01:28,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:01:28,199 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:01:28,199 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:01:28,200 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:01:28,200 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:01:28,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:01:28,200 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:01:28,200 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:01:28,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:01:28,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:01:28,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:01:28,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:01:28,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:01:28,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:01:28,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:01:28,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:01:28,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:01:28,202 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:01:28,203 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:01:28,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:01:28,203 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:01:28,203 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2022-12-13 18:01:28,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:01:28,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:01:28,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:01:28,413 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:01:28,414 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:01:28,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2022-12-13 18:01:31,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:01:31,300 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:01:31,300 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2022-12-13 18:01:31,310 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/data/ac9fec7c4/5ef77ee431bf489b9b71befffcf0f6a4/FLAG3399e486d [2022-12-13 18:01:31,321 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/data/ac9fec7c4/5ef77ee431bf489b9b71befffcf0f6a4 [2022-12-13 18:01:31,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:01:31,324 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:01:31,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:01:31,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:01:31,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:01:31,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fbffa60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31, skipping insertion in model container [2022-12-13 18:01:31,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:01:31,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:01:31,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:01:31,605 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:01:31,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:01:31,662 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:01:31,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31 WrapperNode [2022-12-13 18:01:31,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:01:31,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:01:31,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:01:31,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:01:31,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,700 INFO L138 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2022-12-13 18:01:31,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:01:31,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:01:31,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:01:31,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:01:31,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,723 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:01:31,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:01:31,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:01:31,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:01:31,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (1/1) ... [2022-12-13 18:01:31,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:01:31,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:31,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:01:31,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:01:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:01:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:01:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:01:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:01:31,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:01:31,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:01:31,883 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:01:31,884 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:01:32,061 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:01:32,066 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:01:32,067 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 18:01:32,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:01:32 BoogieIcfgContainer [2022-12-13 18:01:32,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:01:32,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:01:32,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:01:32,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:01:32,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:01:31" (1/3) ... [2022-12-13 18:01:32,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10166ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:01:32, skipping insertion in model container [2022-12-13 18:01:32,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:01:31" (2/3) ... [2022-12-13 18:01:32,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10166ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:01:32, skipping insertion in model container [2022-12-13 18:01:32,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:01:32" (3/3) ... [2022-12-13 18:01:32,078 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2022-12-13 18:01:32,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:01:32,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-12-13 18:01:32,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:01:32,137 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=PETRI_NET, 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;@28bf862c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:01:32,138 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-12-13 18:01:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 18:01:32,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:32,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:32,148 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:32,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031098, now seen corresponding path program 1 times [2022-12-13 18:01:32,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:32,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512966919] [2022-12-13 18:01:32,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:32,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:32,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:32,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512966919] [2022-12-13 18:01:32,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512966919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:32,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:32,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:01:32,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325296972] [2022-12-13 18:01:32,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:32,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:01:32,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:01:32,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:32,422 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:32,553 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2022-12-13 18:01:32,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:01:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 18:01:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:32,564 INFO L225 Difference]: With dead ends: 124 [2022-12-13 18:01:32,564 INFO L226 Difference]: Without dead ends: 118 [2022-12-13 18:01:32,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:01:32,569 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 212 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:32,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 158 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-13 18:01:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 45. [2022-12-13 18:01:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.8) internal successors, (54), 44 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) [2022-12-13 18:01:32,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-12-13 18:01:32,603 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2022-12-13 18:01:32,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:32,603 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-12-13 18:01:32,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,604 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-12-13 18:01:32,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 18:01:32,604 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:32,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:32,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:01:32,605 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033020, now seen corresponding path program 1 times [2022-12-13 18:01:32,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:32,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995892710] [2022-12-13 18:01:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:32,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:32,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995892710] [2022-12-13 18:01:32,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995892710] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:32,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:32,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:01:32,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48713125] [2022-12-13 18:01:32,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:32,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:01:32,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:32,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:01:32,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:01:32,643 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:32,670 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-12-13 18:01:32,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:01:32,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 18:01:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:32,672 INFO L225 Difference]: With dead ends: 46 [2022-12-13 18:01:32,672 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 18:01:32,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:01:32,673 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:32,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 18:01:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-12-13 18:01:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-12-13 18:01:32,677 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2022-12-13 18:01:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:32,677 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-12-13 18:01:32,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-12-13 18:01:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 18:01:32,677 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:32,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:32,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:01:32,678 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2022-12-13 18:01:32,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:32,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353359527] [2022-12-13 18:01:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:32,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:32,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353359527] [2022-12-13 18:01:32,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353359527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:32,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:32,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:01:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540156991] [2022-12-13 18:01:32,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:32,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:01:32,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:32,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:01:32,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:01:32,749 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:32,776 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2022-12-13 18:01:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:01:32,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 18:01:32,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:32,777 INFO L225 Difference]: With dead ends: 76 [2022-12-13 18:01:32,777 INFO L226 Difference]: Without dead ends: 76 [2022-12-13 18:01:32,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:01:32,778 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:32,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:32,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-13 18:01:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2022-12-13 18:01:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 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) [2022-12-13 18:01:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-12-13 18:01:32,781 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2022-12-13 18:01:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:32,782 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-12-13 18:01:32,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-12-13 18:01:32,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 18:01:32,782 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:32,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:32,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:01:32,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:32,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2022-12-13 18:01:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:32,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482204261] [2022-12-13 18:01:32,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:32,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:32,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:32,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482204261] [2022-12-13 18:01:32,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482204261] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:32,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:32,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:01:32,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578699715] [2022-12-13 18:01:32,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:32,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:01:32,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:01:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:32,855 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:32,911 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2022-12-13 18:01:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:01:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 18:01:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:32,913 INFO L225 Difference]: With dead ends: 82 [2022-12-13 18:01:32,913 INFO L226 Difference]: Without dead ends: 82 [2022-12-13 18:01:32,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:01:32,915 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:32,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 157 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-13 18:01:32,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2022-12-13 18:01:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 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) [2022-12-13 18:01:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-12-13 18:01:32,920 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2022-12-13 18:01:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:32,920 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-12-13 18:01:32,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-12-13 18:01:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 18:01:32,920 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:32,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:32,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:01:32,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:32,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:32,922 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2022-12-13 18:01:32,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:32,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471282311] [2022-12-13 18:01:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:32,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:33,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:33,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471282311] [2022-12-13 18:01:33,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471282311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:33,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:33,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:01:33,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284515943] [2022-12-13 18:01:33,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:33,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:01:33,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:01:33,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:01:33,067 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:33,090 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-12-13 18:01:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:01:33,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 18:01:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:33,091 INFO L225 Difference]: With dead ends: 44 [2022-12-13 18:01:33,091 INFO L226 Difference]: Without dead ends: 44 [2022-12-13 18:01:33,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:01:33,092 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:33,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-13 18:01:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-12-13 18:01:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-12-13 18:01:33,095 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 8 [2022-12-13 18:01:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:33,095 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-12-13 18:01:33,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-12-13 18:01:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 18:01:33,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:33,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:33,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:01:33,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2022-12-13 18:01:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:33,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753375702] [2022-12-13 18:01:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:33,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:33,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:33,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753375702] [2022-12-13 18:01:33,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753375702] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:33,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:33,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:01:33,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243977264] [2022-12-13 18:01:33,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:33,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:01:33,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:01:33,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:01:33,244 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:33,357 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2022-12-13 18:01:33,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:01:33,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 18:01:33,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:33,359 INFO L225 Difference]: With dead ends: 78 [2022-12-13 18:01:33,360 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 18:01:33,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:01:33,361 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:33,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 67 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 18:01:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 46. [2022-12-13 18:01:33,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-12-13 18:01:33,365 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 8 [2022-12-13 18:01:33,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:33,365 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-12-13 18:01:33,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,366 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-12-13 18:01:33,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 18:01:33,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:33,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:33,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:01:33,367 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:33,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2022-12-13 18:01:33,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:33,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666446798] [2022-12-13 18:01:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:33,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:33,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:33,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666446798] [2022-12-13 18:01:33,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666446798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:33,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:33,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:01:33,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745066805] [2022-12-13 18:01:33,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:33,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:01:33,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:01:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:01:33,408 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:33,425 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-12-13 18:01:33,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:01:33,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 18:01:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:33,426 INFO L225 Difference]: With dead ends: 52 [2022-12-13 18:01:33,427 INFO L226 Difference]: Without dead ends: 52 [2022-12-13 18:01:33,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:01:33,428 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 42 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:33,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 79 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:33,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-13 18:01:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-12-13 18:01:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 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) [2022-12-13 18:01:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-12-13 18:01:33,432 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 10 [2022-12-13 18:01:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:33,432 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-12-13 18:01:33,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-12-13 18:01:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 18:01:33,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:33,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:33,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 18:01:33,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:33,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:33,433 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2022-12-13 18:01:33,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:33,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602685623] [2022-12-13 18:01:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:33,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:33,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:33,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602685623] [2022-12-13 18:01:33,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602685623] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:33,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:33,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:01:33,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325511579] [2022-12-13 18:01:33,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:33,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:01:33,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:33,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:01:33,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:01:33,463 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:33,482 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-12-13 18:01:33,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:01:33,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 18:01:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:33,483 INFO L225 Difference]: With dead ends: 45 [2022-12-13 18:01:33,483 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 18:01:33,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:01:33,484 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:33,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 18:01:33,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-12-13 18:01:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.588235294117647) internal successors, (54), 44 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) [2022-12-13 18:01:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-12-13 18:01:33,488 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 10 [2022-12-13 18:01:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:33,489 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-12-13 18:01:33,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-12-13 18:01:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 18:01:33,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:33,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:33,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 18:01:33,490 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:33,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:33,491 INFO L85 PathProgramCache]: Analyzing trace with hash 690580064, now seen corresponding path program 1 times [2022-12-13 18:01:33,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:33,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298970385] [2022-12-13 18:01:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:33,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:33,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:33,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298970385] [2022-12-13 18:01:33,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298970385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:33,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:33,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:01:33,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909133220] [2022-12-13 18:01:33,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:33,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:01:33,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:01:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:01:33,631 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:33,715 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2022-12-13 18:01:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:01:33,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 18:01:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:33,717 INFO L225 Difference]: With dead ends: 79 [2022-12-13 18:01:33,717 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 18:01:33,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:01:33,718 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:33,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 113 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 18:01:33,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2022-12-13 18:01:33,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.525) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-12-13 18:01:33,722 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 10 [2022-12-13 18:01:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:33,722 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-12-13 18:01:33,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,723 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-12-13 18:01:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 18:01:33,723 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:33,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:33,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 18:01:33,724 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:33,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1829379870, now seen corresponding path program 1 times [2022-12-13 18:01:33,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070457427] [2022-12-13 18:01:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:33,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:33,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:33,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070457427] [2022-12-13 18:01:33,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070457427] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:33,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:33,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:01:33,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886185464] [2022-12-13 18:01:33,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:33,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:01:33,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:33,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:01:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:01:33,860 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:33,905 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-12-13 18:01:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:01:33,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 18:01:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:33,906 INFO L225 Difference]: With dead ends: 54 [2022-12-13 18:01:33,906 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 18:01:33,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:01:33,907 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:33,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 51 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 18:01:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2022-12-13 18:01:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-12-13 18:01:33,909 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2022-12-13 18:01:33,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:33,909 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-12-13 18:01:33,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:33,909 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-12-13 18:01:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 18:01:33,910 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:33,910 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:33,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 18:01:33,910 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:33,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2022-12-13 18:01:33,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:33,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542905191] [2022-12-13 18:01:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:33,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:34,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542905191] [2022-12-13 18:01:34,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542905191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154111721] [2022-12-13 18:01:34,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:34,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:34,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:34,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:01:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 18:01:34,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:34,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:01:34,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-13 18:01:34,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:01:34,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:34,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:34,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:01:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:34,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154111721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:34,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:34,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-12-13 18:01:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761141324] [2022-12-13 18:01:34,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:34,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 18:01:34,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 18:01:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:01:34,624 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:34,971 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2022-12-13 18:01:34,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:01:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 18:01:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:34,972 INFO L225 Difference]: With dead ends: 107 [2022-12-13 18:01:34,972 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 18:01:34,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2022-12-13 18:01:34,973 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 315 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:34,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 227 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:01:34,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 18:01:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 43. [2022-12-13 18:01:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-12-13 18:01:34,975 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 12 [2022-12-13 18:01:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:34,975 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-12-13 18:01:34,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-12-13 18:01:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 18:01:34,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:34,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:34,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:01:35,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 18:01:35,177 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:35,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:35,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382830, now seen corresponding path program 1 times [2022-12-13 18:01:35,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:35,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183992947] [2022-12-13 18:01:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:35,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:01:35,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:35,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183992947] [2022-12-13 18:01:35,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183992947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:35,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:35,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:01:35,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872100719] [2022-12-13 18:01:35,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:35,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:01:35,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:01:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:01:35,394 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:35,425 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-12-13 18:01:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:01:35,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 18:01:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:35,426 INFO L225 Difference]: With dead ends: 74 [2022-12-13 18:01:35,426 INFO L226 Difference]: Without dead ends: 74 [2022-12-13 18:01:35,426 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 [2022-12-13 18:01:35,427 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:35,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 68 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:35,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-13 18:01:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2022-12-13 18:01:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4772727272727273) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-12-13 18:01:35,431 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 14 [2022-12-13 18:01:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:35,431 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-12-13 18:01:35,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-12-13 18:01:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 18:01:35,432 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:35,432 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:35,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 18:01:35,433 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382883, now seen corresponding path program 1 times [2022-12-13 18:01:35,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:35,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889856429] [2022-12-13 18:01:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:35,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889856429] [2022-12-13 18:01:35,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889856429] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592950178] [2022-12-13 18:01:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:35,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:35,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:35,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:35,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:01:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:35,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:01:35,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:35,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:01:35,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592950178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:35,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:01:35,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-12-13 18:01:35,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480093395] [2022-12-13 18:01:35,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:35,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:01:35,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:01:35,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:01:35,564 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:35,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:35,578 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2022-12-13 18:01:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:01:35,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 18:01:35,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:35,579 INFO L225 Difference]: With dead ends: 91 [2022-12-13 18:01:35,579 INFO L226 Difference]: Without dead ends: 91 [2022-12-13 18:01:35,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:01:35,580 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:35,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 82 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-13 18:01:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2022-12-13 18:01:35,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 68 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2022-12-13 18:01:35,584 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 14 [2022-12-13 18:01:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:35,584 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2022-12-13 18:01:35,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2022-12-13 18:01:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 18:01:35,585 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:35,585 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:35,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 18:01:35,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 18:01:35,785 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:35,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1903447461, now seen corresponding path program 1 times [2022-12-13 18:01:35,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:35,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283283347] [2022-12-13 18:01:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:35,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:35,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283283347] [2022-12-13 18:01:35,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283283347] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:35,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625515789] [2022-12-13 18:01:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:35,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:35,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:35,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:35,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:01:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:36,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:01:36,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:36,063 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 18:01:36,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-13 18:01:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:36,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:36,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625515789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:36,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:36,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-13 18:01:36,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011465626] [2022-12-13 18:01:36,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:36,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:01:36,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:01:36,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:01:36,460 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:36,712 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2022-12-13 18:01:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:01:36,713 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 18:01:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:36,713 INFO L225 Difference]: With dead ends: 96 [2022-12-13 18:01:36,713 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 18:01:36,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2022-12-13 18:01:36,714 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 139 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:36,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 192 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 18:01:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2022-12-13 18:01:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 65 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-12-13 18:01:36,718 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 14 [2022-12-13 18:01:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:36,718 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-12-13 18:01:36,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-12-13 18:01:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 18:01:36,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:36,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:36,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:01:36,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 18:01:36,920 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1460548268, now seen corresponding path program 1 times [2022-12-13 18:01:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:36,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847634542] [2022-12-13 18:01:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:36,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:01:37,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:37,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847634542] [2022-12-13 18:01:37,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847634542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:37,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:37,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:01:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127954857] [2022-12-13 18:01:37,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:37,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:01:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:01:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:37,041 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:37,065 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-12-13 18:01:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:01:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 18:01:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:37,066 INFO L225 Difference]: With dead ends: 65 [2022-12-13 18:01:37,066 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 18:01:37,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:37,067 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:37,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 29 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 18:01:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-12-13 18:01:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 48 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) [2022-12-13 18:01:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-12-13 18:01:37,069 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 14 [2022-12-13 18:01:37,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:37,070 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-12-13 18:01:37,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:37,070 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-12-13 18:01:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 18:01:37,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:37,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:37,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 18:01:37,071 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:37,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1380837930, now seen corresponding path program 1 times [2022-12-13 18:01:37,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:37,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963468041] [2022-12-13 18:01:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:37,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:37,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963468041] [2022-12-13 18:01:37,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963468041] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:37,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614636926] [2022-12-13 18:01:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:37,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:37,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:37,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:01:37,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:37,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 18:01:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:37,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:37,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 18:01:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:37,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614636926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:37,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:37,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-12-13 18:01:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166679036] [2022-12-13 18:01:37,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:37,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:01:37,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:01:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:01:37,364 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:37,473 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2022-12-13 18:01:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:01:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 18:01:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:37,474 INFO L225 Difference]: With dead ends: 92 [2022-12-13 18:01:37,474 INFO L226 Difference]: Without dead ends: 92 [2022-12-13 18:01:37,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:01:37,475 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 207 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:37,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 163 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-13 18:01:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2022-12-13 18:01:37,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.296875) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2022-12-13 18:01:37,477 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 15 [2022-12-13 18:01:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:37,478 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2022-12-13 18:01:37,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2022-12-13 18:01:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 18:01:37,478 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:37,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:37,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:01:37,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 18:01:37,680 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash -679773352, now seen corresponding path program 1 times [2022-12-13 18:01:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:37,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252751128] [2022-12-13 18:01:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:37,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:37,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252751128] [2022-12-13 18:01:37,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252751128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572488649] [2022-12-13 18:01:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:37,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:37,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:37,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:37,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:01:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:01:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:38,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:38,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 18:01:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:38,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572488649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:38,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:38,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-12-13 18:01:38,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603011175] [2022-12-13 18:01:38,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:38,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 18:01:38,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:38,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 18:01:38,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:01:38,154 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:38,434 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2022-12-13 18:01:38,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:01:38,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 18:01:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:38,435 INFO L225 Difference]: With dead ends: 113 [2022-12-13 18:01:38,435 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 18:01:38,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:01:38,436 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 516 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:38,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 218 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 18:01:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 64. [2022-12-13 18:01:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-12-13 18:01:38,439 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 15 [2022-12-13 18:01:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:38,439 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-12-13 18:01:38,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-12-13 18:01:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 18:01:38,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:38,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:38,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:01:38,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:38,640 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:38,641 INFO L85 PathProgramCache]: Analyzing trace with hash -421607914, now seen corresponding path program 1 times [2022-12-13 18:01:38,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:38,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389542937] [2022-12-13 18:01:38,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:38,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:38,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:38,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389542937] [2022-12-13 18:01:38,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389542937] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:38,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273156716] [2022-12-13 18:01:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:38,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:38,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:38,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:38,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:01:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:38,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:01:38,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:38,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:01:38,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273156716] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:38,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:01:38,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2022-12-13 18:01:38,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281713754] [2022-12-13 18:01:38,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:38,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:01:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:38,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:01:38,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:01:38,890 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:38,985 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-12-13 18:01:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:01:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 18:01:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:38,986 INFO L225 Difference]: With dead ends: 65 [2022-12-13 18:01:38,986 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 18:01:38,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:01:38,987 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 111 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:38,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 60 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 18:01:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2022-12-13 18:01:38,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-12-13 18:01:38,989 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 15 [2022-12-13 18:01:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:38,990 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-12-13 18:01:38,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-12-13 18:01:38,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 18:01:38,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:38,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:38,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:01:39,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 18:01:39,191 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:39,191 INFO L85 PathProgramCache]: Analyzing trace with hash 159643962, now seen corresponding path program 1 times [2022-12-13 18:01:39,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:39,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379390321] [2022-12-13 18:01:39,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:39,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:39,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:39,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379390321] [2022-12-13 18:01:39,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379390321] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:39,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:39,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:01:39,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637092991] [2022-12-13 18:01:39,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:39,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:01:39,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:01:39,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:01:39,219 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:39,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:39,242 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-12-13 18:01:39,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:01:39,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 18:01:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:39,242 INFO L225 Difference]: With dead ends: 47 [2022-12-13 18:01:39,242 INFO L226 Difference]: Without dead ends: 47 [2022-12-13 18:01:39,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:39,243 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:39,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 46 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-13 18:01:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-12-13 18:01:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 46 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) [2022-12-13 18:01:39,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-12-13 18:01:39,244 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 17 [2022-12-13 18:01:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:39,244 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-12-13 18:01:39,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-12-13 18:01:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 18:01:39,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:39,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 18:01:39,245 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash 159643963, now seen corresponding path program 1 times [2022-12-13 18:01:39,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:39,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473492112] [2022-12-13 18:01:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:39,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:39,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:39,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473492112] [2022-12-13 18:01:39,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473492112] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:39,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532975497] [2022-12-13 18:01:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:39,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:39,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:39,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:01:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:39,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 18:01:39,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:39,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:39,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-13 18:01:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:39,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532975497] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:39,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:39,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-12-13 18:01:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55159738] [2022-12-13 18:01:39,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:39,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:01:39,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:01:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:01:39,495 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:39,585 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-12-13 18:01:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:01:39,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 18:01:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:39,586 INFO L225 Difference]: With dead ends: 54 [2022-12-13 18:01:39,586 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 18:01:39,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:01:39,586 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:39,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 105 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:39,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 18:01:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-12-13 18:01:39,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:39,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-12-13 18:01:39,589 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 17 [2022-12-13 18:01:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:39,589 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-12-13 18:01:39,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-12-13 18:01:39,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 18:01:39,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:39,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:39,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:01:39,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:39,790 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:39,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:39,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1200973612, now seen corresponding path program 1 times [2022-12-13 18:01:39,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:39,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702830590] [2022-12-13 18:01:39,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:39,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:40,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702830590] [2022-12-13 18:01:40,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702830590] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605131584] [2022-12-13 18:01:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:40,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:40,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:40,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:40,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:01:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:40,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 18:01:40,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:40,113 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:01:40,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:01:40,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:01:40,225 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:01:40,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-13 18:01:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:40,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:40,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-13 18:01:40,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-13 18:01:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:40,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605131584] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:40,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:40,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2022-12-13 18:01:40,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439427848] [2022-12-13 18:01:40,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:40,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 18:01:40,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 18:01:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-12-13 18:01:40,587 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:41,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:41,515 INFO L93 Difference]: Finished difference Result 181 states and 201 transitions. [2022-12-13 18:01:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 18:01:41,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 19 [2022-12-13 18:01:41,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:41,516 INFO L225 Difference]: With dead ends: 181 [2022-12-13 18:01:41,516 INFO L226 Difference]: Without dead ends: 181 [2022-12-13 18:01:41,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=477, Invalid=1685, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 18:01:41,518 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 730 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:41,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 355 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:01:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-13 18:01:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 66. [2022-12-13 18:01:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.3) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-12-13 18:01:41,521 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 19 [2022-12-13 18:01:41,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:41,521 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-12-13 18:01:41,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:41,521 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-12-13 18:01:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 18:01:41,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:41,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:41,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:01:41,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:41,724 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:41,725 INFO L85 PathProgramCache]: Analyzing trace with hash 793061652, now seen corresponding path program 1 times [2022-12-13 18:01:41,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:41,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882822842] [2022-12-13 18:01:41,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:41,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:42,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:42,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882822842] [2022-12-13 18:01:42,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882822842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:42,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733434431] [2022-12-13 18:01:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:42,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:42,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:42,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:42,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:01:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 18:01:42,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:42,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:01:42,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:01:42,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:01:42,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-13 18:01:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:42,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:42,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-13 18:01:42,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-13 18:01:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:42,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733434431] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:42,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:42,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-12-13 18:01:42,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476985074] [2022-12-13 18:01:42,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:42,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 18:01:42,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:42,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 18:01:42,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:01:42,528 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:43,329 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2022-12-13 18:01:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 18:01:43,330 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 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 19 [2022-12-13 18:01:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:43,331 INFO L225 Difference]: With dead ends: 132 [2022-12-13 18:01:43,331 INFO L226 Difference]: Without dead ends: 132 [2022-12-13 18:01:43,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=1342, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 18:01:43,332 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 659 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:43,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 213 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:01:43,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-13 18:01:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 59. [2022-12-13 18:01:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.320754716981132) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-12-13 18:01:43,335 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 19 [2022-12-13 18:01:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:43,335 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-12-13 18:01:43,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-12-13 18:01:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 18:01:43,336 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:43,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:43,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 18:01:43,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:43,537 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:43,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522230, now seen corresponding path program 1 times [2022-12-13 18:01:43,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:43,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451785997] [2022-12-13 18:01:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:43,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:01:43,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:43,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451785997] [2022-12-13 18:01:43,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451785997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:43,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:43,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:01:43,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154781004] [2022-12-13 18:01:43,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:43,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:01:43,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:01:43,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:43,577 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:43,613 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-12-13 18:01:43,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:01:43,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 18:01:43,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:43,614 INFO L225 Difference]: With dead ends: 58 [2022-12-13 18:01:43,614 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 18:01:43,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:01:43,615 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:43,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 66 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:43,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 18:01:43,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-13 18:01:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-12-13 18:01:43,617 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 20 [2022-12-13 18:01:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:43,617 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-12-13 18:01:43,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-12-13 18:01:43,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 18:01:43,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:43,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:43,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 18:01:43,618 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:43,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522231, now seen corresponding path program 1 times [2022-12-13 18:01:43,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:43,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549867148] [2022-12-13 18:01:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:43,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:01:43,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:43,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549867148] [2022-12-13 18:01:43,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549867148] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:43,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:43,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:01:43,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613433842] [2022-12-13 18:01:43,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:43,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:01:43,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:43,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:01:43,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:01:43,699 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:43,766 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-12-13 18:01:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:01:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 18:01:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:43,767 INFO L225 Difference]: With dead ends: 78 [2022-12-13 18:01:43,768 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 18:01:43,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:01:43,768 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 99 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:43,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 98 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 18:01:43,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2022-12-13 18:01:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.290909090909091) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-12-13 18:01:43,771 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 20 [2022-12-13 18:01:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:43,771 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-12-13 18:01:43,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-12-13 18:01:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 18:01:43,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:43,771 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] [2022-12-13 18:01:43,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 18:01:43,772 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:43,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516230, now seen corresponding path program 1 times [2022-12-13 18:01:43,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:43,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054604413] [2022-12-13 18:01:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:43,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:01:43,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:43,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054604413] [2022-12-13 18:01:43,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054604413] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:43,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:43,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 18:01:43,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562058553] [2022-12-13 18:01:43,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:43,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:01:43,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:43,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:01:43,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:01:43,795 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:43,823 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2022-12-13 18:01:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:01:43,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 18:01:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:43,824 INFO L225 Difference]: With dead ends: 59 [2022-12-13 18:01:43,824 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 18:01:43,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:43,824 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:43,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 18:01:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-13 18:01:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 58 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-12-13 18:01:43,826 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 21 [2022-12-13 18:01:43,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:43,827 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-12-13 18:01:43,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:43,827 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-12-13 18:01:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 18:01:43,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:43,827 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] [2022-12-13 18:01:43,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 18:01:43,828 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:43,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516231, now seen corresponding path program 1 times [2022-12-13 18:01:43,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:43,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547660732] [2022-12-13 18:01:43,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:43,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:43,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:43,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547660732] [2022-12-13 18:01:43,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547660732] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:43,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618754915] [2022-12-13 18:01:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:43,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:43,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:43,939 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:43,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:01:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:43,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 18:01:43,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:44,005 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:01:44,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:01:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:44,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:44,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618754915] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:44,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:44,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-12-13 18:01:44,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28036462] [2022-12-13 18:01:44,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:44,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 18:01:44,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 18:01:44,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:01:44,126 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:44,224 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2022-12-13 18:01:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:01:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 18:01:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:44,224 INFO L225 Difference]: With dead ends: 61 [2022-12-13 18:01:44,225 INFO L226 Difference]: Without dead ends: 61 [2022-12-13 18:01:44,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:01:44,225 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:44,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 129 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-13 18:01:44,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-12-13 18:01:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-12-13 18:01:44,226 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 21 [2022-12-13 18:01:44,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:44,227 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-12-13 18:01:44,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-12-13 18:01:44,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:01:44,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:44,227 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] [2022-12-13 18:01:44,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 18:01:44,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 18:01:44,428 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:44,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:44,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1943656895, now seen corresponding path program 1 times [2022-12-13 18:01:44,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:44,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034111783] [2022-12-13 18:01:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:44,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:01:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:44,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034111783] [2022-12-13 18:01:44,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034111783] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:44,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:44,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 18:01:44,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025406907] [2022-12-13 18:01:44,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:44,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:01:44,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:01:44,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:01:44,593 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2022-12-13 18:01:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:44,678 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2022-12-13 18:01:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:01:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 [2022-12-13 18:01:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:44,680 INFO L225 Difference]: With dead ends: 101 [2022-12-13 18:01:44,680 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 18:01:44,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:01:44,680 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:44,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 181 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 18:01:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2022-12-13 18:01:44,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 95 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:44,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2022-12-13 18:01:44,683 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 24 [2022-12-13 18:01:44,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:44,684 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2022-12-13 18:01:44,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2022-12-13 18:01:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2022-12-13 18:01:44,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:01:44,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:44,684 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] [2022-12-13 18:01:44,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 18:01:44,684 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:44,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2132455683, now seen corresponding path program 1 times [2022-12-13 18:01:44,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:44,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256393576] [2022-12-13 18:01:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:01:44,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:44,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256393576] [2022-12-13 18:01:44,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256393576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:44,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:44,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 18:01:44,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90189842] [2022-12-13 18:01:44,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:44,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:01:44,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:44,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:01:44,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:01:44,973 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-12-13 18:01:45,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:45,208 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2022-12-13 18:01:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:01:45,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 [2022-12-13 18:01:45,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:45,209 INFO L225 Difference]: With dead ends: 118 [2022-12-13 18:01:45,209 INFO L226 Difference]: Without dead ends: 118 [2022-12-13 18:01:45,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:01:45,210 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:45,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 220 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-12-13 18:01:45,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2022-12-13 18:01:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 86 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:45,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-12-13 18:01:45,213 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 24 [2022-12-13 18:01:45,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:45,213 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-12-13 18:01:45,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-12-13 18:01:45,213 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-12-13 18:01:45,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:01:45,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:45,213 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] [2022-12-13 18:01:45,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 18:01:45,214 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:45,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:45,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1709753857, now seen corresponding path program 1 times [2022-12-13 18:01:45,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:45,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425990238] [2022-12-13 18:01:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:45,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:01:45,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:45,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425990238] [2022-12-13 18:01:45,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425990238] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:45,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:45,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 18:01:45,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747704865] [2022-12-13 18:01:45,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:45,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:01:45,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:01:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:01:45,485 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-12-13 18:01:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:45,677 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2022-12-13 18:01:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:01:45,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 [2022-12-13 18:01:45,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:45,679 INFO L225 Difference]: With dead ends: 140 [2022-12-13 18:01:45,679 INFO L226 Difference]: Without dead ends: 140 [2022-12-13 18:01:45,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:01:45,680 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 107 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:45,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 174 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-13 18:01:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2022-12-13 18:01:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.2424242424242424) internal successors, (123), 102 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 123 transitions. [2022-12-13 18:01:45,683 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 123 transitions. Word has length 24 [2022-12-13 18:01:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:45,683 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 123 transitions. [2022-12-13 18:01:45,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-12-13 18:01:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 123 transitions. [2022-12-13 18:01:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 18:01:45,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:45,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:45,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 18:01:45,684 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash 123776973, now seen corresponding path program 1 times [2022-12-13 18:01:45,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:45,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238994343] [2022-12-13 18:01:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:01:45,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:45,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238994343] [2022-12-13 18:01:45,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238994343] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:45,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:45,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:01:45,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189929834] [2022-12-13 18:01:45,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:45,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:01:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:45,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:01:45,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:45,811 INFO L87 Difference]: Start difference. First operand 103 states and 123 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:45,831 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2022-12-13 18:01:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:01:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 18:01:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:45,832 INFO L225 Difference]: With dead ends: 102 [2022-12-13 18:01:45,832 INFO L226 Difference]: Without dead ends: 81 [2022-12-13 18:01:45,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:01:45,833 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:45,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:45,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-13 18:01:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-12-13 18:01:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 80 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-12-13 18:01:45,836 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 25 [2022-12-13 18:01:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:45,836 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-12-13 18:01:45,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:45,836 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-12-13 18:01:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 18:01:45,836 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:45,836 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:45,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 18:01:45,836 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:45,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1713538504, now seen corresponding path program 1 times [2022-12-13 18:01:45,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:45,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737501498] [2022-12-13 18:01:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:45,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:46,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:46,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737501498] [2022-12-13 18:01:46,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737501498] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:46,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157171940] [2022-12-13 18:01:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:46,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:46,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:46,297 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:46,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:01:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 18:01:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:46,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:01:46,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:01:46,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:01:46,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-12-13 18:01:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 18:01:46,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:01:46,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157171940] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:46,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:01:46,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 19 [2022-12-13 18:01:46,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888173615] [2022-12-13 18:01:46,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:01:46,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:01:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2022-12-13 18:01:46,485 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:46,578 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2022-12-13 18:01:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:01:46,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 18:01:46,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:46,579 INFO L225 Difference]: With dead ends: 148 [2022-12-13 18:01:46,579 INFO L226 Difference]: Without dead ends: 116 [2022-12-13 18:01:46,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-12-13 18:01:46,580 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:46,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 140 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-13 18:01:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2022-12-13 18:01:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 90 states have (on average 1.1777777777777778) internal successors, (106), 92 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2022-12-13 18:01:46,583 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 25 [2022-12-13 18:01:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:46,583 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2022-12-13 18:01:46,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2022-12-13 18:01:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 18:01:46,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:46,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:46,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 18:01:46,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 18:01:46,784 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:46,785 INFO L85 PathProgramCache]: Analyzing trace with hash 2136240330, now seen corresponding path program 2 times [2022-12-13 18:01:46,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:46,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007916354] [2022-12-13 18:01:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:46,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:47,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:47,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007916354] [2022-12-13 18:01:47,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007916354] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:47,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062691535] [2022-12-13 18:01:47,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:01:47,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:47,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:47,099 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:47,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:01:47,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:01:47,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:01:47,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 18:01:47,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:47,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:01:47,515 INFO L321 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2022-12-13 18:01:47,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 20 [2022-12-13 18:01:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:47,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:47,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-12-13 18:01:47,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-12-13 18:01:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:47,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062691535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:47,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:47,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 34 [2022-12-13 18:01:47,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070694156] [2022-12-13 18:01:47,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:47,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 18:01:47,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 18:01:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 18:01:47,973 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:50,600 INFO L93 Difference]: Finished difference Result 204 states and 224 transitions. [2022-12-13 18:01:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 18:01:50,600 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 18:01:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:50,601 INFO L225 Difference]: With dead ends: 204 [2022-12-13 18:01:50,601 INFO L226 Difference]: Without dead ends: 197 [2022-12-13 18:01:50,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=807, Invalid=3225, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 18:01:50,602 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 891 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:50,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 232 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:01:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-13 18:01:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 119. [2022-12-13 18:01:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 116 states have (on average 1.1724137931034482) internal successors, (136), 118 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 136 transitions. [2022-12-13 18:01:50,606 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 136 transitions. Word has length 25 [2022-12-13 18:01:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:50,606 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 136 transitions. [2022-12-13 18:01:50,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:50,607 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 136 transitions. [2022-12-13 18:01:50,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 18:01:50,607 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:50,607 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:50,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 18:01:50,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:50,808 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:50,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:50,809 INFO L85 PathProgramCache]: Analyzing trace with hash -438004926, now seen corresponding path program 1 times [2022-12-13 18:01:50,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:50,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572607996] [2022-12-13 18:01:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:50,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:01:50,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:50,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572607996] [2022-12-13 18:01:50,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572607996] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:50,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169779962] [2022-12-13 18:01:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:50,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:50,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:50,906 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:50,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:01:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:50,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 18:01:50,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:01:51,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:01:51,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169779962] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:51,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:51,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2022-12-13 18:01:51,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982545090] [2022-12-13 18:01:51,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:51,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:01:51,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:51,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:01:51,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:01:51,042 INFO L87 Difference]: Start difference. First operand 119 states and 136 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:51,127 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2022-12-13 18:01:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:01:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 18:01:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:51,131 INFO L225 Difference]: With dead ends: 149 [2022-12-13 18:01:51,131 INFO L226 Difference]: Without dead ends: 149 [2022-12-13 18:01:51,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:01:51,132 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 160 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:51,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 169 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:01:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-12-13 18:01:51,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 123. [2022-12-13 18:01:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 120 states have (on average 1.1583333333333334) internal successors, (139), 122 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2022-12-13 18:01:51,134 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 28 [2022-12-13 18:01:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:51,134 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2022-12-13 18:01:51,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2022-12-13 18:01:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 18:01:51,135 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:51,135 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:51,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 18:01:51,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:51,336 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:51,338 INFO L85 PathProgramCache]: Analyzing trace with hash -35087801, now seen corresponding path program 1 times [2022-12-13 18:01:51,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:51,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791779826] [2022-12-13 18:01:51,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:51,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 18:01:51,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:51,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791779826] [2022-12-13 18:01:51,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791779826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:01:51,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:01:51,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 18:01:51,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902529125] [2022-12-13 18:01:51,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:01:51,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:01:51,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:01:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:01:51,610 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:01:51,723 INFO L93 Difference]: Finished difference Result 141 states and 158 transitions. [2022-12-13 18:01:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:01:51,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-12-13 18:01:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:01:51,724 INFO L225 Difference]: With dead ends: 141 [2022-12-13 18:01:51,724 INFO L226 Difference]: Without dead ends: 130 [2022-12-13 18:01:51,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:01:51,724 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:01:51,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 132 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:01:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-13 18:01:51,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2022-12-13 18:01:51,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 98 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2022-12-13 18:01:51,726 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 30 [2022-12-13 18:01:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:01:51,726 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2022-12-13 18:01:51,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:01:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2022-12-13 18:01:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 18:01:51,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:01:51,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:01:51,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 18:01:51,727 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:01:51,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:01:51,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666176, now seen corresponding path program 3 times [2022-12-13 18:01:51,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:01:51,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055010115] [2022-12-13 18:01:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:01:51,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:01:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:01:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:01:52,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:01:52,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055010115] [2022-12-13 18:01:52,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055010115] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:01:52,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3778188] [2022-12-13 18:01:52,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:01:52,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:01:52,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:01:52,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:01:52,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:01:52,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 18:01:52,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:01:52,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 18:01:52,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:01:52,202 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:01:52,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:01:52,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:01:56,905 INFO L321 Elim1Store]: treesize reduction 8, result has 86.9 percent of original size [2022-12-13 18:01:56,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 67 [2022-12-13 18:01:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:01:57,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:01:57,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-12-13 18:01:57,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:01:57,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2022-12-13 18:01:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:01:57,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3778188] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:01:57,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:01:57,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 31 [2022-12-13 18:01:57,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191097220] [2022-12-13 18:01:57,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:01:57,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 18:01:57,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:01:57,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 18:01:57,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=859, Unknown=2, NotChecked=0, Total=992 [2022-12-13 18:01:57,869 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:01,438 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2022-12-13 18:02:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 18:02:01,439 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-13 18:02:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:01,439 INFO L225 Difference]: With dead ends: 171 [2022-12-13 18:02:01,439 INFO L226 Difference]: Without dead ends: 171 [2022-12-13 18:02:01,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=905, Invalid=3125, Unknown=2, NotChecked=0, Total=4032 [2022-12-13 18:02:01,440 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 535 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:01,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 264 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:02:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-12-13 18:02:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 111. [2022-12-13 18:02:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 110 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2022-12-13 18:02:01,442 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 31 [2022-12-13 18:02:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:01,442 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2022-12-13 18:02:01,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2022-12-13 18:02:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 18:02:01,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:01,443 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:01,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 18:02:01,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 18:02:01,644 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:01,645 INFO L85 PathProgramCache]: Analyzing trace with hash -992295355, now seen corresponding path program 2 times [2022-12-13 18:02:01,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:01,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82044557] [2022-12-13 18:02:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:01,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:02:01,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82044557] [2022-12-13 18:02:01,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82044557] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:01,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345008447] [2022-12-13 18:02:01,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:02:01,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:01,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:01,817 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:01,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:02:01,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:02:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:02:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 18:02:01,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:02:01,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:02,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 18:02:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:02:02,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345008447] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:02,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:02,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-12-13 18:02:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224273489] [2022-12-13 18:02:02,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:02,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:02:02,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:02:02,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:02:02,079 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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) [2022-12-13 18:02:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:02,291 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2022-12-13 18:02:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:02:02,292 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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 32 [2022-12-13 18:02:02,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:02,293 INFO L225 Difference]: With dead ends: 124 [2022-12-13 18:02:02,293 INFO L226 Difference]: Without dead ends: 124 [2022-12-13 18:02:02,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:02:02,294 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 170 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:02,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 210 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:02:02,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-13 18:02:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2022-12-13 18:02:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:02,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2022-12-13 18:02:02,296 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 32 [2022-12-13 18:02:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:02,296 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2022-12-13 18:02:02,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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) [2022-12-13 18:02:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2022-12-13 18:02:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 18:02:02,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:02,297 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:02,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 18:02:02,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 18:02:02,498 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:02,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:02,499 INFO L85 PathProgramCache]: Analyzing trace with hash -696384903, now seen corresponding path program 1 times [2022-12-13 18:02:02,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:02,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808178964] [2022-12-13 18:02:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:02,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:02:02,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808178964] [2022-12-13 18:02:02,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808178964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504348925] [2022-12-13 18:02:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:02,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:02,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:02,688 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:02,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:02:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:02,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 18:02:02,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:02,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:02:02,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:02,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 18:02:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:02:02,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504348925] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:02,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:02,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-12-13 18:02:02,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834146315] [2022-12-13 18:02:02,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:02,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 18:02:02,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 18:02:02,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-12-13 18:02:02,936 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 21 states, 20 states have (on average 3.65) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:03,166 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2022-12-13 18:02:03,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:02:03,166 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.65) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-13 18:02:03,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:03,166 INFO L225 Difference]: With dead ends: 129 [2022-12-13 18:02:03,166 INFO L226 Difference]: Without dead ends: 129 [2022-12-13 18:02:03,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-12-13 18:02:03,167 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 155 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:03,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 144 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:02:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-13 18:02:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2022-12-13 18:02:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 122 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2022-12-13 18:02:03,169 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 33 [2022-12-13 18:02:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:03,170 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2022-12-13 18:02:03,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.65) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:03,170 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2022-12-13 18:02:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 18:02:03,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:03,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:03,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 18:02:03,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 18:02:03,371 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash 846553876, now seen corresponding path program 1 times [2022-12-13 18:02:03,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:03,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801953237] [2022-12-13 18:02:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:02:03,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:03,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801953237] [2022-12-13 18:02:03,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801953237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:03,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625455853] [2022-12-13 18:02:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:03,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:03,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:03,672 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:03,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:02:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:03,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 18:02:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:03,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:02:03,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:02:03,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:03,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-12-13 18:02:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:02:04,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:04,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-13 18:02:04,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-13 18:02:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:02:04,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625455853] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:04,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:04,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-12-13 18:02:04,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557663333] [2022-12-13 18:02:04,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:04,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 18:02:04,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:04,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 18:02:04,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-12-13 18:02:04,380 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:05,923 INFO L93 Difference]: Finished difference Result 178 states and 194 transitions. [2022-12-13 18:02:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 18:02:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-13 18:02:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:05,923 INFO L225 Difference]: With dead ends: 178 [2022-12-13 18:02:05,923 INFO L226 Difference]: Without dead ends: 178 [2022-12-13 18:02:05,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=626, Invalid=2566, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 18:02:05,924 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 508 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:05,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 290 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:02:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-13 18:02:05,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2022-12-13 18:02:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 125 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:05,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 143 transitions. [2022-12-13 18:02:05,926 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 143 transitions. Word has length 35 [2022-12-13 18:02:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:05,926 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 143 transitions. [2022-12-13 18:02:05,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 143 transitions. [2022-12-13 18:02:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 18:02:05,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:05,927 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:05,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 18:02:06,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 18:02:06,127 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:06,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1310569203, now seen corresponding path program 3 times [2022-12-13 18:02:06,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:06,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521843290] [2022-12-13 18:02:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:06,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:02:06,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:06,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521843290] [2022-12-13 18:02:06,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521843290] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:06,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336470797] [2022-12-13 18:02:06,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:02:06,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:06,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:06,703 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:06,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 18:02:06,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:02:06,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:02:06,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 18:02:06,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:06,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:02:07,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:02:07,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:02:07,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:02:07,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:02:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:02:07,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:07,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:07,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 18:02:07,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:07,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:02:07,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 18:02:07,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:02:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:02:07,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336470797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:07,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:07,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 42 [2022-12-13 18:02:07,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092867490] [2022-12-13 18:02:07,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:07,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 18:02:07,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:07,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 18:02:07,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1542, Unknown=8, NotChecked=0, Total=1722 [2022-12-13 18:02:07,795 INFO L87 Difference]: Start difference. First operand 126 states and 143 transitions. Second operand has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:08,468 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2022-12-13 18:02:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 18:02:08,468 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-13 18:02:08,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:08,468 INFO L225 Difference]: With dead ends: 156 [2022-12-13 18:02:08,468 INFO L226 Difference]: Without dead ends: 143 [2022-12-13 18:02:08,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=484, Invalid=2814, Unknown=8, NotChecked=0, Total=3306 [2022-12-13 18:02:08,469 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 260 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:08,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 411 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:02:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-13 18:02:08,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 130. [2022-12-13 18:02:08,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 129 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 146 transitions. [2022-12-13 18:02:08,471 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 146 transitions. Word has length 36 [2022-12-13 18:02:08,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:08,471 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 146 transitions. [2022-12-13 18:02:08,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 146 transitions. [2022-12-13 18:02:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 18:02:08,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:08,472 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:08,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 18:02:08,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:08,672 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash 634042763, now seen corresponding path program 4 times [2022-12-13 18:02:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:08,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956654213] [2022-12-13 18:02:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:02:09,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:09,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956654213] [2022-12-13 18:02:09,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956654213] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:09,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904836343] [2022-12-13 18:02:09,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:02:09,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:09,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:09,035 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:09,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 18:02:09,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:02:09,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:02:09,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 18:02:09,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:09,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:02:10,312 INFO L321 Elim1Store]: treesize reduction 20, result has 70.1 percent of original size [2022-12-13 18:02:10,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 73 [2022-12-13 18:02:10,324 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:02:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:02:10,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:11,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2022-12-13 18:02:11,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 115 [2022-12-13 18:02:11,279 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-12-13 18:02:11,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-12-13 18:02:11,314 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:02:11,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904836343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:11,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:11,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-12-13 18:02:11,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691891457] [2022-12-13 18:02:11,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:11,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 18:02:11,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:11,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 18:02:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 18:02:11,316 INFO L87 Difference]: Start difference. First operand 130 states and 146 transitions. Second operand has 46 states, 45 states have (on average 1.711111111111111) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:29,129 INFO L93 Difference]: Finished difference Result 284 states and 311 transitions. [2022-12-13 18:02:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 18:02:29,130 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.711111111111111) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-13 18:02:29,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:29,130 INFO L225 Difference]: With dead ends: 284 [2022-12-13 18:02:29,130 INFO L226 Difference]: Without dead ends: 222 [2022-12-13 18:02:29,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=1754, Invalid=8548, Unknown=0, NotChecked=0, Total=10302 [2022-12-13 18:02:29,132 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 500 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:29,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 512 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 18:02:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-12-13 18:02:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 88. [2022-12-13 18:02:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 1.127906976744186) internal successors, (97), 87 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-12-13 18:02:29,134 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 37 [2022-12-13 18:02:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:29,134 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-12-13 18:02:29,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.711111111111111) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-12-13 18:02:29,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 18:02:29,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:29,134 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:29,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 18:02:29,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 18:02:29,336 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:29,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1715286768, now seen corresponding path program 4 times [2022-12-13 18:02:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:29,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225200757] [2022-12-13 18:02:29,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:02:29,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:29,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225200757] [2022-12-13 18:02:29,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225200757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:29,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848785130] [2022-12-13 18:02:29,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:02:29,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:29,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:29,704 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:29,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 18:02:29,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:02:29,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:02:29,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 18:02:29,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:29,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:02:29,966 INFO L321 Elim1Store]: treesize reduction 24, result has 47.8 percent of original size [2022-12-13 18:02:29,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 36 [2022-12-13 18:02:30,396 INFO L321 Elim1Store]: treesize reduction 43, result has 54.7 percent of original size [2022-12-13 18:02:30,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 108 [2022-12-13 18:02:30,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:30,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2022-12-13 18:02:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:02:30,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:31,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1707 treesize of output 1651 [2022-12-13 18:02:34,192 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:34,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 86 [2022-12-13 18:02:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:02:34,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848785130] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:34,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:34,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 46 [2022-12-13 18:02:34,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130792023] [2022-12-13 18:02:34,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:34,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 18:02:34,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:34,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 18:02:34,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 18:02:34,605 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:42,145 INFO L93 Difference]: Finished difference Result 196 states and 209 transitions. [2022-12-13 18:02:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 18:02:42,145 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-13 18:02:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:42,146 INFO L225 Difference]: With dead ends: 196 [2022-12-13 18:02:42,146 INFO L226 Difference]: Without dead ends: 152 [2022-12-13 18:02:42,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1087, Invalid=6569, Unknown=0, NotChecked=0, Total=7656 [2022-12-13 18:02:42,148 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 326 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:42,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 306 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 18:02:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-13 18:02:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 130. [2022-12-13 18:02:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.109375) internal successors, (142), 129 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2022-12-13 18:02:42,150 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 40 [2022-12-13 18:02:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:42,150 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2022-12-13 18:02:42,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2022-12-13 18:02:42,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 18:02:42,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:42,151 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:42,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 18:02:42,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-12-13 18:02:42,351 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:42,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2078988342, now seen corresponding path program 2 times [2022-12-13 18:02:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:42,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920451343] [2022-12-13 18:02:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:42,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:02:42,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:42,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920451343] [2022-12-13 18:02:42,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920451343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:42,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442662645] [2022-12-13 18:02:42,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:02:42,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:42,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:42,710 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:42,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 18:02:42,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:02:42,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:02:42,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 18:02:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:42,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:02:43,159 INFO L321 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-12-13 18:02:43,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-12-13 18:02:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:02:43,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:43,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-12-13 18:02:43,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:43,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 23 [2022-12-13 18:02:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:02:43,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442662645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:43,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:43,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-12-13 18:02:43,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011014782] [2022-12-13 18:02:43,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:43,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 18:02:43,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:43,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 18:02:43,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 18:02:43,488 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 38 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:47,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:47,253 INFO L93 Difference]: Finished difference Result 262 states and 279 transitions. [2022-12-13 18:02:47,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 18:02:47,253 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 38 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-13 18:02:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:47,254 INFO L225 Difference]: With dead ends: 262 [2022-12-13 18:02:47,254 INFO L226 Difference]: Without dead ends: 248 [2022-12-13 18:02:47,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1628, Invalid=6382, Unknown=0, NotChecked=0, Total=8010 [2022-12-13 18:02:47,256 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 737 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:47,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 354 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:02:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-12-13 18:02:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 159. [2022-12-13 18:02:47,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 157 states have (on average 1.1146496815286624) internal successors, (175), 158 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2022-12-13 18:02:47,260 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 41 [2022-12-13 18:02:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:47,260 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2022-12-13 18:02:47,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 38 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2022-12-13 18:02:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 18:02:47,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:47,261 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:47,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 18:02:47,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:47,462 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2073091567, now seen corresponding path program 1 times [2022-12-13 18:02:47,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:47,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545482007] [2022-12-13 18:02:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:47,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:02:47,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545482007] [2022-12-13 18:02:47,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545482007] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:47,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756711054] [2022-12-13 18:02:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:47,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:47,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:47,653 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:47,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 18:02:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 18:02:47,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:02:47,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:47,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 18:02:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:02:47,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756711054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:47,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:47,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-12-13 18:02:47,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692518527] [2022-12-13 18:02:47,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:47,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 18:02:47,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 18:02:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-12-13 18:02:47,975 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:48,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:48,301 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2022-12-13 18:02:48,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 18:02:48,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-13 18:02:48,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:48,302 INFO L225 Difference]: With dead ends: 180 [2022-12-13 18:02:48,302 INFO L226 Difference]: Without dead ends: 180 [2022-12-13 18:02:48,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 18:02:48,303 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 99 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:48,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 275 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:02:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-13 18:02:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 164. [2022-12-13 18:02:48,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 162 states have (on average 1.1111111111111112) internal successors, (180), 163 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 180 transitions. [2022-12-13 18:02:48,306 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 180 transitions. Word has length 44 [2022-12-13 18:02:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:48,306 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 180 transitions. [2022-12-13 18:02:48,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:48,306 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 180 transitions. [2022-12-13 18:02:48,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 18:02:48,307 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:48,307 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:48,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 18:02:48,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:48,508 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:48,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:48,509 INFO L85 PathProgramCache]: Analyzing trace with hash 800775488, now seen corresponding path program 3 times [2022-12-13 18:02:48,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:48,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788170725] [2022-12-13 18:02:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:48,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:48,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:02:48,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:48,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788170725] [2022-12-13 18:02:48,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788170725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:48,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100598309] [2022-12-13 18:02:48,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:02:48,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:48,898 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:48,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 18:02:48,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 18:02:48,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:02:48,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 18:02:48,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:49,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:02:49,510 INFO L321 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2022-12-13 18:02:49,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-12-13 18:02:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 18:02:49,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:50,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-12-13 18:02:50,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:50,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2022-12-13 18:02:50,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2022-12-13 18:02:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 18:02:50,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100598309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:50,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:50,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 48 [2022-12-13 18:02:50,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150929617] [2022-12-13 18:02:50,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:50,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 18:02:50,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 18:02:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2125, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 18:02:50,791 INFO L87 Difference]: Start difference. First operand 164 states and 180 transitions. Second operand has 49 states, 48 states have (on average 2.375) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:02:55,810 INFO L93 Difference]: Finished difference Result 226 states and 243 transitions. [2022-12-13 18:02:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 18:02:55,810 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.375) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 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 47 [2022-12-13 18:02:55,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:02:55,811 INFO L225 Difference]: With dead ends: 226 [2022-12-13 18:02:55,811 INFO L226 Difference]: Without dead ends: 184 [2022-12-13 18:02:55,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2087, Invalid=8013, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 18:02:55,812 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 419 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:02:55,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 317 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 18:02:55,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-12-13 18:02:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2022-12-13 18:02:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 143 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2022-12-13 18:02:55,814 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 47 [2022-12-13 18:02:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:02:55,814 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2022-12-13 18:02:55,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.375) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:02:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2022-12-13 18:02:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 18:02:55,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:02:55,815 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:02:55,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 18:02:56,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 18:02:56,015 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:02:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:02:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash 255004699, now seen corresponding path program 5 times [2022-12-13 18:02:56,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:02:56,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129961799] [2022-12-13 18:02:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:02:56,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:02:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:02:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:02:56,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:02:56,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129961799] [2022-12-13 18:02:56,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129961799] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:02:56,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111446223] [2022-12-13 18:02:56,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:02:56,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:02:56,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:02:56,672 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:02:56,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 18:02:56,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 18:02:56,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:02:56,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 18:02:56,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:02:56,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:02:56,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:02:57,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:02:57,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:02:57,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:02:57,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:02:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:02:57,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:02:57,214 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_901 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_901) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-12-13 18:02:57,220 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_901 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_901) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-12-13 18:02:57,296 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_901 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_901) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-12-13 18:02:57,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:57,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 18:02:57,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:02:57,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:02:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 9 not checked. [2022-12-13 18:02:57,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111446223] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:02:57,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:02:57,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 36 [2022-12-13 18:02:57,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533464741] [2022-12-13 18:02:57,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:02:57,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 18:02:57,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:02:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 18:02:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=945, Unknown=20, NotChecked=192, Total=1260 [2022-12-13 18:02:57,572 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:00,123 INFO L93 Difference]: Finished difference Result 308 states and 328 transitions. [2022-12-13 18:03:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 18:03:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-13 18:03:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:00,124 INFO L225 Difference]: With dead ends: 308 [2022-12-13 18:03:00,124 INFO L226 Difference]: Without dead ends: 187 [2022-12-13 18:03:00,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=835, Invalid=4857, Unknown=20, NotChecked=450, Total=6162 [2022-12-13 18:03:00,124 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 500 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 25 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:00,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 284 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 543 Invalid, 7 Unknown, 168 Unchecked, 0.3s Time] [2022-12-13 18:03:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-13 18:03:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 180. [2022-12-13 18:03:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 1.0898876404494382) internal successors, (194), 179 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2022-12-13 18:03:00,126 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 48 [2022-12-13 18:03:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:00,127 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2022-12-13 18:03:00,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5555555555555554) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2022-12-13 18:03:00,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 18:03:00,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:00,127 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:00,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 18:03:00,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 18:03:00,328 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash -82487339, now seen corresponding path program 4 times [2022-12-13 18:03:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:00,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892555586] [2022-12-13 18:03:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:03:00,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:00,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892555586] [2022-12-13 18:03:00,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892555586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:00,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832187592] [2022-12-13 18:03:00,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:03:00,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:00,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:00,940 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:00,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 18:03:01,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:03:01,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:03:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 18:03:01,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:01,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:03:01,545 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-12-13 18:03:01,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2022-12-13 18:03:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 18:03:01,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:01,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-12-13 18:03:01,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:03:01,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2022-12-13 18:03:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 18:03:01,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832187592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:03:01,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:03:01,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2022-12-13 18:03:01,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986670999] [2022-12-13 18:03:01,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:03:01,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 18:03:01,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:03:01,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 18:03:01,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 18:03:01,955 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 43 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:04,027 INFO L93 Difference]: Finished difference Result 280 states and 301 transitions. [2022-12-13 18:03:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 18:03:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 43 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-12-13 18:03:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:04,028 INFO L225 Difference]: With dead ends: 280 [2022-12-13 18:03:04,028 INFO L226 Difference]: Without dead ends: 273 [2022-12-13 18:03:04,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1031, Invalid=4371, Unknown=0, NotChecked=0, Total=5402 [2022-12-13 18:03:04,029 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 528 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:04,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 238 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 18:03:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-12-13 18:03:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 195. [2022-12-13 18:03:04,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 193 states have (on average 1.0932642487046633) internal successors, (211), 194 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 211 transitions. [2022-12-13 18:03:04,031 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 211 transitions. Word has length 55 [2022-12-13 18:03:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:04,031 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 211 transitions. [2022-12-13 18:03:04,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.604651162790698) internal successors, (112), 43 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 211 transitions. [2022-12-13 18:03:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 18:03:04,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:04,032 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:04,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 18:03:04,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:04,234 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash -477173151, now seen corresponding path program 6 times [2022-12-13 18:03:04,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:04,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139157018] [2022-12-13 18:03:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:04,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 18:03:04,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:04,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139157018] [2022-12-13 18:03:04,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139157018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:04,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056200530] [2022-12-13 18:03:04,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:03:04,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:04,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:04,493 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:04,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 18:03:04,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 18:03:04,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:03:04,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 18:03:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:04,839 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 18:03:04,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 18:03:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 18:03:05,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 18:03:05,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056200530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:03:05,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:03:05,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2022-12-13 18:03:05,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660697245] [2022-12-13 18:03:05,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:03:05,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 18:03:05,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:03:05,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 18:03:05,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-12-13 18:03:05,379 INFO L87 Difference]: Start difference. First operand 195 states and 211 transitions. Second operand has 29 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:05,743 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2022-12-13 18:03:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 18:03:05,743 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-12-13 18:03:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:05,744 INFO L225 Difference]: With dead ends: 210 [2022-12-13 18:03:05,744 INFO L226 Difference]: Without dead ends: 210 [2022-12-13 18:03:05,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 18:03:05,744 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:05,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 351 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:03:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-12-13 18:03:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-12-13 18:03:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 1.0891089108910892) internal successors, (220), 203 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:05,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 220 transitions. [2022-12-13 18:03:05,746 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 220 transitions. Word has length 56 [2022-12-13 18:03:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:05,746 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 220 transitions. [2022-12-13 18:03:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.9285714285714284) internal successors, (110), 29 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 220 transitions. [2022-12-13 18:03:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 18:03:05,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:05,747 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:05,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 18:03:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:05,948 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:05,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:05,949 INFO L85 PathProgramCache]: Analyzing trace with hash 763177458, now seen corresponding path program 5 times [2022-12-13 18:03:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:05,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730038163] [2022-12-13 18:03:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 52 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:03:06,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:06,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730038163] [2022-12-13 18:03:06,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730038163] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:06,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735959618] [2022-12-13 18:03:06,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:03:06,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:06,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:06,506 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:06,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 18:03:06,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 18:03:06,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:03:06,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 18:03:06,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:07,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:03:07,478 INFO L321 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2022-12-13 18:03:07,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 31 [2022-12-13 18:03:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 56 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:03:07,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:07,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-12-13 18:03:07,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2022-12-13 18:03:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:03:08,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735959618] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:03:08,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:03:08,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 53 [2022-12-13 18:03:08,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293696800] [2022-12-13 18:03:08,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:03:08,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-13 18:03:08,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:03:08,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-13 18:03:08,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2510, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 18:03:08,547 INFO L87 Difference]: Start difference. First operand 204 states and 220 transitions. Second operand has 53 states, 53 states have (on average 2.7169811320754715) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:14,354 INFO L93 Difference]: Finished difference Result 425 states and 451 transitions. [2022-12-13 18:03:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 18:03:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.7169811320754715) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-12-13 18:03:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:14,356 INFO L225 Difference]: With dead ends: 425 [2022-12-13 18:03:14,356 INFO L226 Difference]: Without dead ends: 405 [2022-12-13 18:03:14,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1846, Invalid=8660, Unknown=0, NotChecked=0, Total=10506 [2022-12-13 18:03:14,357 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1357 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:14,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 613 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2027 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 18:03:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-12-13 18:03:14,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 248. [2022-12-13 18:03:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 246 states have (on average 1.0934959349593496) internal successors, (269), 247 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:14,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 269 transitions. [2022-12-13 18:03:14,361 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 269 transitions. Word has length 59 [2022-12-13 18:03:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:14,361 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 269 transitions. [2022-12-13 18:03:14,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.7169811320754715) internal successors, (144), 53 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:14,361 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 269 transitions. [2022-12-13 18:03:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 18:03:14,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:14,362 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:14,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 18:03:14,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 18:03:14,563 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1399784233, now seen corresponding path program 7 times [2022-12-13 18:03:14,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:14,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399965600] [2022-12-13 18:03:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:14,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:03:15,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:15,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399965600] [2022-12-13 18:03:15,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399965600] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:15,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80436008] [2022-12-13 18:03:15,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:03:15,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:15,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:15,671 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:15,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 18:03:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:15,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-13 18:03:15,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:15,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:03:15,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:03:16,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:03:16,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:03:16,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:03:16,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:03:16,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:03:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 18:03:16,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:16,258 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-12-13 18:03:16,323 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int)) (v_ArrVal_1138 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1138) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-12-13 18:03:16,388 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int)) (v_ArrVal_1137 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1137) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-12-13 18:03:16,394 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1139 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1139) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-12-13 18:03:16,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:03:16,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 18:03:16,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:03:16,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:03:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 15 not checked. [2022-12-13 18:03:16,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80436008] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:03:16,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:03:16,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 18, 18] total 48 [2022-12-13 18:03:16,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321900595] [2022-12-13 18:03:16,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:03:16,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 18:03:16,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:03:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 18:03:16,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1741, Unknown=29, NotChecked=348, Total=2256 [2022-12-13 18:03:16,659 INFO L87 Difference]: Start difference. First operand 248 states and 269 transitions. Second operand has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:22,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:22,212 INFO L93 Difference]: Finished difference Result 501 states and 533 transitions. [2022-12-13 18:03:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 18:03:22,213 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-12-13 18:03:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:22,213 INFO L225 Difference]: With dead ends: 501 [2022-12-13 18:03:22,213 INFO L226 Difference]: Without dead ends: 377 [2022-12-13 18:03:22,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 99 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 3291 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1393, Invalid=11004, Unknown=51, NotChecked=892, Total=13340 [2022-12-13 18:03:22,214 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 982 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 38 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:22,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 578 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1164 Invalid, 22 Unknown, 367 Unchecked, 0.7s Time] [2022-12-13 18:03:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-12-13 18:03:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 291. [2022-12-13 18:03:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 289 states have (on average 1.0865051903114187) internal successors, (314), 290 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 314 transitions. [2022-12-13 18:03:22,217 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 314 transitions. Word has length 60 [2022-12-13 18:03:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:22,217 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 314 transitions. [2022-12-13 18:03:22,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.4166666666666665) internal successors, (116), 48 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 314 transitions. [2022-12-13 18:03:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 18:03:22,218 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:22,218 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:22,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 18:03:22,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 18:03:22,419 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:22,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash 793903528, now seen corresponding path program 6 times [2022-12-13 18:03:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:22,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144702003] [2022-12-13 18:03:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:03:23,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:23,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144702003] [2022-12-13 18:03:23,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144702003] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983370359] [2022-12-13 18:03:23,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:03:23,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:23,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:23,008 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:23,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 18:03:23,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 18:03:23,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:03:23,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-13 18:03:23,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:23,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:03:24,191 INFO L321 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2022-12-13 18:03:24,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 34 [2022-12-13 18:03:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:03:24,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:24,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2022-12-13 18:03:24,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2022-12-13 18:03:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 26 proven. 66 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:03:25,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983370359] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:03:25,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:03:25,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 61 [2022-12-13 18:03:25,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507188802] [2022-12-13 18:03:25,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:03:25,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 18:03:25,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:03:25,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 18:03:25,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 18:03:25,607 INFO L87 Difference]: Start difference. First operand 291 states and 314 transitions. Second operand has 61 states, 61 states have (on average 2.6557377049180326) internal successors, (162), 61 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:36,427 INFO L93 Difference]: Finished difference Result 593 states and 628 transitions. [2022-12-13 18:03:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 18:03:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.6557377049180326) internal successors, (162), 61 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-12-13 18:03:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:36,430 INFO L225 Difference]: With dead ends: 593 [2022-12-13 18:03:36,430 INFO L226 Difference]: Without dead ends: 571 [2022-12-13 18:03:36,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3281 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=2324, Invalid=14188, Unknown=0, NotChecked=0, Total=16512 [2022-12-13 18:03:36,431 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1514 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 3133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1514 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 3158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:36,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1514 Valid, 874 Invalid, 3158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3133 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-13 18:03:36,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-12-13 18:03:36,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 346. [2022-12-13 18:03:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 344 states have (on average 1.0901162790697674) internal successors, (375), 345 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 375 transitions. [2022-12-13 18:03:36,435 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 375 transitions. Word has length 65 [2022-12-13 18:03:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:36,436 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 375 transitions. [2022-12-13 18:03:36,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.6557377049180326) internal successors, (162), 61 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 375 transitions. [2022-12-13 18:03:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 18:03:36,436 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:36,436 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:36,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 18:03:36,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:36,638 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1316121423, now seen corresponding path program 1 times [2022-12-13 18:03:36,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:36,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761910237] [2022-12-13 18:03:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:36,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 18:03:36,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:36,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761910237] [2022-12-13 18:03:36,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761910237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:36,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775772159] [2022-12-13 18:03:36,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:36,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:36,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:36,818 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:36,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 18:03:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:36,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:03:36,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 18:03:37,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 18:03:37,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775772159] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:03:37,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:03:37,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 27 [2022-12-13 18:03:37,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602714934] [2022-12-13 18:03:37,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:03:37,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 18:03:37,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:03:37,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 18:03:37,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2022-12-13 18:03:37,247 INFO L87 Difference]: Start difference. First operand 346 states and 375 transitions. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:37,532 INFO L93 Difference]: Finished difference Result 420 states and 454 transitions. [2022-12-13 18:03:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 18:03:37,533 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-13 18:03:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:37,533 INFO L225 Difference]: With dead ends: 420 [2022-12-13 18:03:37,533 INFO L226 Difference]: Without dead ends: 420 [2022-12-13 18:03:37,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=463, Invalid=1177, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 18:03:37,534 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 188 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:37,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 196 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:03:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-12-13 18:03:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 343. [2022-12-13 18:03:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 341 states have (on average 1.0879765395894427) internal successors, (371), 342 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 371 transitions. [2022-12-13 18:03:37,537 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 371 transitions. Word has length 66 [2022-12-13 18:03:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:37,537 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 371 transitions. [2022-12-13 18:03:37,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 27 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 371 transitions. [2022-12-13 18:03:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 18:03:37,538 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:37,538 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:37,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 18:03:37,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-12-13 18:03:37,739 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:37,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:37,740 INFO L85 PathProgramCache]: Analyzing trace with hash -569162641, now seen corresponding path program 8 times [2022-12-13 18:03:37,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:37,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759294690] [2022-12-13 18:03:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:37,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 18:03:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:38,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759294690] [2022-12-13 18:03:38,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759294690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:38,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764380532] [2022-12-13 18:03:38,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:03:38,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:38,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:38,087 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:38,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 18:03:38,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:03:38,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:03:38,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-13 18:03:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 18:03:38,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:38,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 18:03:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 18:03:38,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764380532] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:03:38,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:03:38,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-12-13 18:03:38,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274580147] [2022-12-13 18:03:38,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:03:38,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 18:03:38,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:03:38,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 18:03:38,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-12-13 18:03:38,652 INFO L87 Difference]: Start difference. First operand 343 states and 371 transitions. Second operand has 31 states, 30 states have (on average 3.533333333333333) internal successors, (106), 31 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:39,109 INFO L93 Difference]: Finished difference Result 441 states and 473 transitions. [2022-12-13 18:03:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 18:03:39,109 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.533333333333333) internal successors, (106), 31 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-13 18:03:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:39,110 INFO L225 Difference]: With dead ends: 441 [2022-12-13 18:03:39,110 INFO L226 Difference]: Without dead ends: 441 [2022-12-13 18:03:39,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=400, Invalid=1670, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 18:03:39,110 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 349 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:39,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 469 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:03:39,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-12-13 18:03:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 368. [2022-12-13 18:03:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 366 states have (on average 1.0956284153005464) internal successors, (401), 367 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 401 transitions. [2022-12-13 18:03:39,114 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 401 transitions. Word has length 68 [2022-12-13 18:03:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:39,114 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 401 transitions. [2022-12-13 18:03:39,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.533333333333333) internal successors, (106), 31 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 401 transitions. [2022-12-13 18:03:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 18:03:39,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:39,115 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:39,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 18:03:39,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:39,316 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash -279344840, now seen corresponding path program 2 times [2022-12-13 18:03:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:39,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000350873] [2022-12-13 18:03:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 8 proven. 83 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 18:03:40,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000350873] [2022-12-13 18:03:40,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000350873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202385610] [2022-12-13 18:03:40,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:03:40,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:40,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:40,200 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:40,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 18:03:40,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:03:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:03:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-13 18:03:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:40,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:03:41,049 INFO L321 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2022-12-13 18:03:41,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 20 [2022-12-13 18:03:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 18:03:41,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:41,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-12-13 18:03:41,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2022-12-13 18:03:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 18:03:41,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202385610] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:03:41,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:03:41,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19, 19] total 57 [2022-12-13 18:03:41,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932858179] [2022-12-13 18:03:41,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:03:41,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 18:03:41,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:03:41,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 18:03:41,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2926, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 18:03:41,959 INFO L87 Difference]: Start difference. First operand 368 states and 401 transitions. Second operand has 57 states, 57 states have (on average 2.736842105263158) internal successors, (156), 57 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:44,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:44,671 INFO L93 Difference]: Finished difference Result 489 states and 520 transitions. [2022-12-13 18:03:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 18:03:44,671 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.736842105263158) internal successors, (156), 57 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-12-13 18:03:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:44,672 INFO L225 Difference]: With dead ends: 489 [2022-12-13 18:03:44,672 INFO L226 Difference]: Without dead ends: 439 [2022-12-13 18:03:44,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1400, Invalid=9312, Unknown=0, NotChecked=0, Total=10712 [2022-12-13 18:03:44,673 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 709 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:44,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 736 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 18:03:44,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-12-13 18:03:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 369. [2022-12-13 18:03:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 367 states have (on average 1.0871934604904632) internal successors, (399), 368 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:44,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 399 transitions. [2022-12-13 18:03:44,676 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 399 transitions. Word has length 68 [2022-12-13 18:03:44,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:44,676 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 399 transitions. [2022-12-13 18:03:44,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.736842105263158) internal successors, (156), 57 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:44,676 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 399 transitions. [2022-12-13 18:03:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 18:03:44,677 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:44,677 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:44,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 18:03:44,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:44,878 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:44,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash -74626530, now seen corresponding path program 7 times [2022-12-13 18:03:44,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:44,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30950774] [2022-12-13 18:03:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:44,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 45 proven. 86 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 18:03:45,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:45,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30950774] [2022-12-13 18:03:45,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30950774] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:45,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915752260] [2022-12-13 18:03:45,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:03:45,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:45,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:45,451 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:45,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 18:03:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:45,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 18:03:45,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:46,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:03:46,747 INFO L321 Elim1Store]: treesize reduction 25, result has 55.4 percent of original size [2022-12-13 18:03:46,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 53 [2022-12-13 18:03:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 11 proven. 116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:03:46,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:47,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-12-13 18:03:47,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-12-13 18:03:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 91 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:03:48,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915752260] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:03:48,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:03:48,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26, 26] total 69 [2022-12-13 18:03:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636363758] [2022-12-13 18:03:48,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:03:48,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-13 18:03:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:03:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-13 18:03:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=4300, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 18:03:48,200 INFO L87 Difference]: Start difference. First operand 369 states and 399 transitions. Second operand has 69 states, 69 states have (on average 2.608695652173913) internal successors, (180), 69 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:03:56,953 INFO L93 Difference]: Finished difference Result 816 states and 862 transitions. [2022-12-13 18:03:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-13 18:03:56,954 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.608695652173913) internal successors, (180), 69 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-12-13 18:03:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:03:56,955 INFO L225 Difference]: With dead ends: 816 [2022-12-13 18:03:56,955 INFO L226 Difference]: Without dead ends: 760 [2022-12-13 18:03:56,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4741 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=3347, Invalid=18115, Unknown=0, NotChecked=0, Total=21462 [2022-12-13 18:03:56,956 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1766 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 2995 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1766 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 3032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 18:03:56,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1766 Valid, 713 Invalid, 3032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2995 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 18:03:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-12-13 18:03:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 423. [2022-12-13 18:03:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 421 states have (on average 1.0878859857482186) internal successors, (458), 422 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:56,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 458 transitions. [2022-12-13 18:03:56,961 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 458 transitions. Word has length 71 [2022-12-13 18:03:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:03:56,961 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 458 transitions. [2022-12-13 18:03:56,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.608695652173913) internal successors, (180), 69 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:03:56,961 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 458 transitions. [2022-12-13 18:03:56,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 18:03:56,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:03:56,961 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:03:56,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 18:03:57,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-13 18:03:57,163 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:03:57,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:03:57,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1627104823, now seen corresponding path program 9 times [2022-12-13 18:03:57,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:03:57,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842339805] [2022-12-13 18:03:57,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:03:57,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:03:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:03:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 16 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:03:58,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:03:58,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842339805] [2022-12-13 18:03:58,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842339805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:03:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792253083] [2022-12-13 18:03:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:03:58,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:03:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:03:58,205 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:03:58,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 18:03:58,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 18:03:58,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:03:58,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 123 conjunts are in the unsatisfiable core [2022-12-13 18:03:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:03:58,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:03:59,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:03:59,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-13 18:03:59,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:03:59,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:03:59,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:03:59,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:03:59,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:03:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 10 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:03:59,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:03:59,545 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1550 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1550) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2022-12-13 18:03:59,613 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1549 (Array Int Int)) (v_ArrVal_1550 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1549) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1550) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 1 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-12-13 18:03:59,674 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1548 (Array Int Int)) (v_ArrVal_1550 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_1548) |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1550) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 2 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-12-13 18:03:59,678 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1550 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1550) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 3 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-12-13 18:04:03,861 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1550 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_1550) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ 4 |c_ULTIMATE.start_cstrcat_~s2#1.offset|)) 0)) is different from false [2022-12-13 18:04:03,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:04:03,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-12-13 18:04:03,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:04:03,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-12-13 18:04:03,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 18:04:04,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:04:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 38 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 29 not checked. [2022-12-13 18:04:04,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792253083] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:04:04,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:04:04,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 27] total 75 [2022-12-13 18:04:04,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290367351] [2022-12-13 18:04:04,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:04:04,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-13 18:04:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:04:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-13 18:04:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=4399, Unknown=49, NotChecked=700, Total=5550 [2022-12-13 18:04:04,614 INFO L87 Difference]: Start difference. First operand 423 states and 458 transitions. Second operand has 75 states, 75 states have (on average 2.5733333333333333) internal successors, (193), 75 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:08,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:04:08,251 INFO L93 Difference]: Finished difference Result 482 states and 513 transitions. [2022-12-13 18:04:08,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 18:04:08,252 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.5733333333333333) internal successors, (193), 75 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-12-13 18:04:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:04:08,254 INFO L225 Difference]: With dead ends: 482 [2022-12-13 18:04:08,254 INFO L226 Difference]: Without dead ends: 430 [2022-12-13 18:04:08,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 5 IntricatePredicates, 3 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1231, Invalid=9245, Unknown=50, NotChecked=1030, Total=11556 [2022-12-13 18:04:08,255 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 510 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 19 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 579 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:04:08,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1036 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2288 Invalid, 19 Unknown, 579 Unchecked, 1.3s Time] [2022-12-13 18:04:08,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-12-13 18:04:08,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 411. [2022-12-13 18:04:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 409 states have (on average 1.0831295843520783) internal successors, (443), 410 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:08,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 443 transitions. [2022-12-13 18:04:08,261 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 443 transitions. Word has length 72 [2022-12-13 18:04:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:04:08,261 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 443 transitions. [2022-12-13 18:04:08,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.5733333333333333) internal successors, (193), 75 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:04:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 443 transitions. [2022-12-13 18:04:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-13 18:04:08,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:04:08,262 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:04:08,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 18:04:08,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:08,463 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-12-13 18:04:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:04:08,463 INFO L85 PathProgramCache]: Analyzing trace with hash 176586938, now seen corresponding path program 10 times [2022-12-13 18:04:08,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:04:08,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193479566] [2022-12-13 18:04:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:04:08,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:04:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:04:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 13 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:04:09,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:04:09,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193479566] [2022-12-13 18:04:09,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193479566] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:04:09,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191962181] [2022-12-13 18:04:09,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:04:09,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:04:09,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:04:09,718 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:04:09,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94c39061-3cc6-480e-a4cd-789b7abb4d8a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 18:04:09,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:04:09,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:04:09,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-13 18:04:09,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:04:10,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 18:04:10,285 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-13 18:04:10,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-12-13 18:04:10,690 INFO L321 Elim1Store]: treesize reduction 69, result has 44.8 percent of original size [2022-12-13 18:04:10,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 72 [2022-12-13 18:04:11,554 INFO L321 Elim1Store]: treesize reduction 63, result has 56.6 percent of original size [2022-12-13 18:04:11,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 103 treesize of output 161 [2022-12-13 18:04:13,389 INFO L321 Elim1Store]: treesize reduction 106, result has 62.7 percent of original size [2022-12-13 18:04:13,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 201 treesize of output 336 [2022-12-13 18:05:17,710 WARN L233 SmtUtils]: Spent 27.38s on a formula simplification. DAG size of input: 504 DAG size of output: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:05:20,040 INFO L321 Elim1Store]: treesize reduction 172, result has 70.4 percent of original size [2022-12-13 18:05:20,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 310 treesize of output 631