./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0214.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0214.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:39:38,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:39:38,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:39:38,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:39:38,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:39:38,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:39:38,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:39:38,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:39:38,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:39:38,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:39:38,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:39:38,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:39:38,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:39:38,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:39:38,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:39:38,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:39:38,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:39:38,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:39:38,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:39:38,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:39:38,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:39:38,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:39:38,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:39:38,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:39:38,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:39:38,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:39:38,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:39:38,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:39:38,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:39:38,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:39:38,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:39:38,163 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:39:38,164 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:39:38,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:39:38,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:39:38,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:39:38,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:39:38,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:39:38,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:39:38,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:39:38,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:39:38,174 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 12:39:38,219 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:39:38,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:39:38,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:39:38,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:39:38,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:39:38,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:39:38,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:39:38,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:39:38,223 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:39:38,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:39:38,225 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:39:38,225 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:39:38,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:39:38,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:39:38,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:39:38,226 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 12:39:38,227 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 12:39:38,227 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 12:39:38,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:39:38,227 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:39:38,227 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:39:38,228 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:39:38,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:39:38,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:39:38,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:39:38,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:39:38,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:39:38,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:39:38,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:39:38,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:39:38,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f6f146d76d903376288fe056dbbc9e1a8443f92d5e8b82343734efc8a9842e4 [2022-11-20 12:39:38,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:39:38,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:39:38,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:39:38,625 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:39:38,625 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:39:38,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/memsafety/test-0214.i [2022-11-20 12:39:41,832 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:39:42,189 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:39:42,190 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/sv-benchmarks/c/memsafety/test-0214.i [2022-11-20 12:39:42,221 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/data/bae103ac8/6d480896af0745cfac18820149183247/FLAG5537c4a81 [2022-11-20 12:39:42,242 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/data/bae103ac8/6d480896af0745cfac18820149183247 [2022-11-20 12:39:42,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:39:42,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:39:42,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:39:42,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:39:42,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:39:42,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:42,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@621f8ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42, skipping insertion in model container [2022-11-20 12:39:42,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:42,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:39:42,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:39:42,826 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:39:42,849 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:39:42,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:39:42,941 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:39:42,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42 WrapperNode [2022-11-20 12:39:42,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:39:42,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:39:42,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:39:42,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:39:42,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:42,970 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,000 INFO L138 Inliner]: procedures = 181, calls = 42, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 173 [2022-11-20 12:39:43,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:39:43,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:39:43,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:39:43,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:39:43,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,055 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:39:43,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:39:43,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:39:43,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:39:43,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (1/1) ... [2022-11-20 12:39:43,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:39:43,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:39:43,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:39:43,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:39:43,174 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-20 12:39:43,174 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-20 12:39:43,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:39:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:39:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:39:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 12:39:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 12:39:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:39:43,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 12:39:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:39:43,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:39:43,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:39:43,426 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:39:43,428 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:39:44,012 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:39:44,020 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:39:44,020 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 12:39:44,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:39:44 BoogieIcfgContainer [2022-11-20 12:39:44,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:39:44,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:39:44,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:39:44,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:39:44,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:39:42" (1/3) ... [2022-11-20 12:39:44,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f67e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:39:44, skipping insertion in model container [2022-11-20 12:39:44,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:39:42" (2/3) ... [2022-11-20 12:39:44,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8f67e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:39:44, skipping insertion in model container [2022-11-20 12:39:44,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:39:44" (3/3) ... [2022-11-20 12:39:44,034 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214.i [2022-11-20 12:39:44,058 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:39:44,058 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-11-20 12:39:44,104 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:39:44,112 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@61064d83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:39:44,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-11-20 12:39:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 138 states have internal predecessors, (158), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:39:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:39:44,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:44,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:39:44,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:44,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1072948778, now seen corresponding path program 1 times [2022-11-20 12:39:44,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:44,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264445759] [2022-11-20 12:39:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:44,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:44,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:44,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264445759] [2022-11-20 12:39:44,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264445759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:44,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:44,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:39:44,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899683233] [2022-11-20 12:39:44,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:44,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:39:44,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:39:44,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:39:44,366 INFO L87 Difference]: Start difference. First operand has 142 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 138 states have internal predecessors, (158), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:44,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:44,395 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2022-11-20 12:39:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:39:44,398 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 12:39:44,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:44,406 INFO L225 Difference]: With dead ends: 142 [2022-11-20 12:39:44,407 INFO L226 Difference]: Without dead ends: 140 [2022-11-20 12:39:44,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:39:44,412 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:44,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:39:44,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-20 12:39:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-11-20 12:39:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 80 states have (on average 1.8875) internal successors, (151), 136 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:39:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2022-11-20 12:39:44,469 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 6 [2022-11-20 12:39:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:44,470 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2022-11-20 12:39:44,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2022-11-20 12:39:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 12:39:44,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:44,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:44,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:39:44,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:44,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1280381875, now seen corresponding path program 1 times [2022-11-20 12:39:44,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:44,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814976562] [2022-11-20 12:39:44,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:44,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:44,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:44,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814976562] [2022-11-20 12:39:44,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814976562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:44,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:44,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 12:39:44,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836461247] [2022-11-20 12:39:44,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:44,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:39:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:39:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:39:44,650 INFO L87 Difference]: Start difference. First operand 140 states and 155 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:44,955 INFO L93 Difference]: Finished difference Result 271 states and 300 transitions. [2022-11-20 12:39:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:39:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 12:39:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:44,958 INFO L225 Difference]: With dead ends: 271 [2022-11-20 12:39:44,959 INFO L226 Difference]: Without dead ends: 271 [2022-11-20 12:39:44,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:39:44,961 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 136 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:44,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 197 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:39:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-20 12:39:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 189. [2022-11-20 12:39:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 126 states have (on average 1.8571428571428572) internal successors, (234), 182 states have internal predecessors, (234), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:39:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 242 transitions. [2022-11-20 12:39:44,983 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 242 transitions. Word has length 7 [2022-11-20 12:39:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:44,984 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 242 transitions. [2022-11-20 12:39:44,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 242 transitions. [2022-11-20 12:39:44,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 12:39:44,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:44,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:44,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:39:44,985 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:44,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1280381874, now seen corresponding path program 1 times [2022-11-20 12:39:44,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:44,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997438915] [2022-11-20 12:39:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:44,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:45,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:45,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997438915] [2022-11-20 12:39:45,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997438915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:45,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:45,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:39:45,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605544550] [2022-11-20 12:39:45,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:45,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:45,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:45,232 INFO L87 Difference]: Start difference. First operand 189 states and 242 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:45,538 INFO L93 Difference]: Finished difference Result 334 states and 412 transitions. [2022-11-20 12:39:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:45,541 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 12:39:45,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:45,546 INFO L225 Difference]: With dead ends: 334 [2022-11-20 12:39:45,547 INFO L226 Difference]: Without dead ends: 334 [2022-11-20 12:39:45,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:39:45,556 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 139 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:45,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 329 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:39:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-20 12:39:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 262. [2022-11-20 12:39:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 193 states have (on average 1.8186528497409327) internal successors, (351), 251 states have internal predecessors, (351), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:39:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 367 transitions. [2022-11-20 12:39:45,606 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 367 transitions. Word has length 7 [2022-11-20 12:39:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:45,607 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 367 transitions. [2022-11-20 12:39:45,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 367 transitions. [2022-11-20 12:39:45,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 12:39:45,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:45,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:45,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:39:45,609 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:45,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1280381812, now seen corresponding path program 1 times [2022-11-20 12:39:45,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:45,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719414452] [2022-11-20 12:39:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:45,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:45,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719414452] [2022-11-20 12:39:45,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719414452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:45,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:45,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:39:45,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466116926] [2022-11-20 12:39:45,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:45,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:45,812 INFO L87 Difference]: Start difference. First operand 262 states and 367 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:46,062 INFO L93 Difference]: Finished difference Result 333 states and 410 transitions. [2022-11-20 12:39:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 12:39:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:46,064 INFO L225 Difference]: With dead ends: 333 [2022-11-20 12:39:46,065 INFO L226 Difference]: Without dead ends: 333 [2022-11-20 12:39:46,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:39:46,066 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 121 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:46,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 343 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-20 12:39:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 262. [2022-11-20 12:39:46,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 193 states have (on average 1.8186528497409327) internal successors, (351), 251 states have internal predecessors, (351), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-20 12:39:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 367 transitions. [2022-11-20 12:39:46,084 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 367 transitions. Word has length 7 [2022-11-20 12:39:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:46,084 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 367 transitions. [2022-11-20 12:39:46,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 367 transitions. [2022-11-20 12:39:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 12:39:46,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:46,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:46,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:39:46,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:46,089 INFO L85 PathProgramCache]: Analyzing trace with hash -251697362, now seen corresponding path program 1 times [2022-11-20 12:39:46,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:46,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518694950] [2022-11-20 12:39:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:46,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:46,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:46,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518694950] [2022-11-20 12:39:46,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518694950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:46,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:46,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:39:46,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66961569] [2022-11-20 12:39:46,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:46,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:39:46,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:46,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:39:46,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:39:46,502 INFO L87 Difference]: Start difference. First operand 262 states and 367 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-11-20 12:39:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:46,877 INFO L93 Difference]: Finished difference Result 379 states and 501 transitions. [2022-11-20 12:39:46,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:39:46,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2022-11-20 12:39:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:46,881 INFO L225 Difference]: With dead ends: 379 [2022-11-20 12:39:46,881 INFO L226 Difference]: Without dead ends: 379 [2022-11-20 12:39:46,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:39:46,882 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 124 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:46,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 642 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-20 12:39:46,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 304. [2022-11-20 12:39:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 232 states have (on average 1.8017241379310345) internal successors, (418), 291 states have internal predecessors, (418), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:46,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 438 transitions. [2022-11-20 12:39:46,908 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 438 transitions. Word has length 10 [2022-11-20 12:39:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:46,912 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 438 transitions. [2022-11-20 12:39:46,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-11-20 12:39:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 438 transitions. [2022-11-20 12:39:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 12:39:46,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:46,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:46,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:39:46,916 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:46,924 INFO L85 PathProgramCache]: Analyzing trace with hash -249850320, now seen corresponding path program 1 times [2022-11-20 12:39:46,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833746884] [2022-11-20 12:39:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:46,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:47,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:47,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833746884] [2022-11-20 12:39:47,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833746884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:47,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:47,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:39:47,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236433176] [2022-11-20 12:39:47,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:47,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:39:47,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:47,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:39:47,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:39:47,137 INFO L87 Difference]: Start difference. First operand 304 states and 438 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-11-20 12:39:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:47,352 INFO L93 Difference]: Finished difference Result 369 states and 490 transitions. [2022-11-20 12:39:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:39:47,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2022-11-20 12:39:47,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:47,355 INFO L225 Difference]: With dead ends: 369 [2022-11-20 12:39:47,356 INFO L226 Difference]: Without dead ends: 369 [2022-11-20 12:39:47,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:39:47,359 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 104 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:47,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 659 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-20 12:39:47,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 303. [2022-11-20 12:39:47,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 231 states have (on average 1.8051948051948052) internal successors, (417), 290 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 437 transitions. [2022-11-20 12:39:47,372 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 437 transitions. Word has length 10 [2022-11-20 12:39:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:47,373 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 437 transitions. [2022-11-20 12:39:47,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-11-20 12:39:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 437 transitions. [2022-11-20 12:39:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 12:39:47,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:47,375 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:47,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:39:47,375 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:47,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:47,376 INFO L85 PathProgramCache]: Analyzing trace with hash 787315061, now seen corresponding path program 1 times [2022-11-20 12:39:47,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:47,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763298956] [2022-11-20 12:39:47,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:47,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:47,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:47,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763298956] [2022-11-20 12:39:47,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763298956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:47,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:47,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:39:47,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253872446] [2022-11-20 12:39:47,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:47,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:39:47,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:39:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:39:47,418 INFO L87 Difference]: Start difference. First operand 303 states and 437 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:47,541 INFO L93 Difference]: Finished difference Result 358 states and 488 transitions. [2022-11-20 12:39:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:39:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 12:39:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:47,543 INFO L225 Difference]: With dead ends: 358 [2022-11-20 12:39:47,544 INFO L226 Difference]: Without dead ends: 351 [2022-11-20 12:39:47,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:39:47,545 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 68 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:47,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 225 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:39:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-20 12:39:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 300. [2022-11-20 12:39:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 228 states have (on average 1.8070175438596492) internal successors, (412), 287 states have internal predecessors, (412), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 432 transitions. [2022-11-20 12:39:47,555 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 432 transitions. Word has length 11 [2022-11-20 12:39:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:47,556 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 432 transitions. [2022-11-20 12:39:47,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:39:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 432 transitions. [2022-11-20 12:39:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:39:47,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:47,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:47,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:39:47,558 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:47,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1918130468, now seen corresponding path program 1 times [2022-11-20 12:39:47,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:47,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67031798] [2022-11-20 12:39:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:47,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:47,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:47,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:47,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67031798] [2022-11-20 12:39:47,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67031798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:47,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:47,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:39:47,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378849931] [2022-11-20 12:39:47,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:47,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:47,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:47,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:47,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:47,623 INFO L87 Difference]: Start difference. First operand 300 states and 432 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:47,985 INFO L93 Difference]: Finished difference Result 423 states and 528 transitions. [2022-11-20 12:39:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-20 12:39:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:47,987 INFO L225 Difference]: With dead ends: 423 [2022-11-20 12:39:47,987 INFO L226 Difference]: Without dead ends: 423 [2022-11-20 12:39:47,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:39:47,988 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 255 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:47,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 329 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:39:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-11-20 12:39:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 300. [2022-11-20 12:39:47,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 228 states have (on average 1.780701754385965) internal successors, (406), 287 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:47,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 426 transitions. [2022-11-20 12:39:47,999 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 426 transitions. Word has length 13 [2022-11-20 12:39:48,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:48,000 INFO L495 AbstractCegarLoop]: Abstraction has 300 states and 426 transitions. [2022-11-20 12:39:48,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:48,000 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 426 transitions. [2022-11-20 12:39:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:39:48,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:48,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:48,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:39:48,002 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:48,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:48,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1918130467, now seen corresponding path program 1 times [2022-11-20 12:39:48,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:48,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061476911] [2022-11-20 12:39:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:48,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:48,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:48,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:48,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061476911] [2022-11-20 12:39:48,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061476911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:48,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:48,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:39:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800524687] [2022-11-20 12:39:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:48,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:39:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:39:48,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:39:48,196 INFO L87 Difference]: Start difference. First operand 300 states and 426 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:48,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:48,657 INFO L93 Difference]: Finished difference Result 370 states and 472 transitions. [2022-11-20 12:39:48,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:39:48,658 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-20 12:39:48,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:48,660 INFO L225 Difference]: With dead ends: 370 [2022-11-20 12:39:48,660 INFO L226 Difference]: Without dead ends: 370 [2022-11-20 12:39:48,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:39:48,661 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 112 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:48,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 608 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:39:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-20 12:39:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 310. [2022-11-20 12:39:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 235 states have (on average 1.7617021276595746) internal successors, (414), 295 states have internal predecessors, (414), 10 states have call successors, (10), 5 states have call predecessors, (10), 8 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-20 12:39:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 440 transitions. [2022-11-20 12:39:48,680 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 440 transitions. Word has length 13 [2022-11-20 12:39:48,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:48,680 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 440 transitions. [2022-11-20 12:39:48,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:48,681 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 440 transitions. [2022-11-20 12:39:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:39:48,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:48,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:48,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:39:48,683 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:48,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:48,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1917206946, now seen corresponding path program 1 times [2022-11-20 12:39:48,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:48,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714091554] [2022-11-20 12:39:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:48,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:48,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:48,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:48,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714091554] [2022-11-20 12:39:48,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714091554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:48,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:48,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:39:48,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433212294] [2022-11-20 12:39:48,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:48,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:39:48,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:39:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:39:48,979 INFO L87 Difference]: Start difference. First operand 310 states and 440 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:49,374 INFO L93 Difference]: Finished difference Result 369 states and 470 transitions. [2022-11-20 12:39:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:39:49,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-20 12:39:49,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:49,377 INFO L225 Difference]: With dead ends: 369 [2022-11-20 12:39:49,377 INFO L226 Difference]: Without dead ends: 369 [2022-11-20 12:39:49,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:39:49,378 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 107 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:49,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 630 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:39:49,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-11-20 12:39:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 304. [2022-11-20 12:39:49,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 232 states have (on average 1.771551724137931) internal successors, (411), 289 states have internal predecessors, (411), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 431 transitions. [2022-11-20 12:39:49,392 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 431 transitions. Word has length 13 [2022-11-20 12:39:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:49,392 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 431 transitions. [2022-11-20 12:39:49,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 431 transitions. [2022-11-20 12:39:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:39:49,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:49,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:49,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:39:49,394 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:49,395 INFO L85 PathProgramCache]: Analyzing trace with hash 398929757, now seen corresponding path program 1 times [2022-11-20 12:39:49,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:49,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603523050] [2022-11-20 12:39:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:49,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:49,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:39:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:49,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:49,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603523050] [2022-11-20 12:39:49,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603523050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:49,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:49,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:39:49,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459799973] [2022-11-20 12:39:49,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:49,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:49,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:49,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:49,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:49,511 INFO L87 Difference]: Start difference. First operand 304 states and 431 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:49,809 INFO L93 Difference]: Finished difference Result 473 states and 618 transitions. [2022-11-20 12:39:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-20 12:39:49,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:49,813 INFO L225 Difference]: With dead ends: 473 [2022-11-20 12:39:49,814 INFO L226 Difference]: Without dead ends: 473 [2022-11-20 12:39:49,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:39:49,815 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 247 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:49,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 342 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:39:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-11-20 12:39:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 310. [2022-11-20 12:39:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 238 states have (on average 1.7521008403361344) internal successors, (417), 295 states have internal predecessors, (417), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:49,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2022-11-20 12:39:49,828 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 15 [2022-11-20 12:39:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:49,829 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2022-11-20 12:39:49,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2022-11-20 12:39:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 12:39:49,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:49,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:49,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:39:49,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:49,831 INFO L85 PathProgramCache]: Analyzing trace with hash 398929758, now seen corresponding path program 1 times [2022-11-20 12:39:49,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:49,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521750308] [2022-11-20 12:39:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:49,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:49,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:39:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:49,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:49,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521750308] [2022-11-20 12:39:49,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521750308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:49,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:49,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:39:49,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858828178] [2022-11-20 12:39:49,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:49,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:49,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:49,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:49,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:49,961 INFO L87 Difference]: Start difference. First operand 310 states and 437 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:50,211 INFO L93 Difference]: Finished difference Result 367 states and 461 transitions. [2022-11-20 12:39:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:50,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-20 12:39:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:50,214 INFO L225 Difference]: With dead ends: 367 [2022-11-20 12:39:50,214 INFO L226 Difference]: Without dead ends: 367 [2022-11-20 12:39:50,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:39:50,215 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 191 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:50,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 356 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:50,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-20 12:39:50,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 310. [2022-11-20 12:39:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 238 states have (on average 1.7142857142857142) internal successors, (408), 295 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 428 transitions. [2022-11-20 12:39:50,225 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 428 transitions. Word has length 15 [2022-11-20 12:39:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:50,225 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 428 transitions. [2022-11-20 12:39:50,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 428 transitions. [2022-11-20 12:39:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 12:39:50,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:50,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:50,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:39:50,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:50,228 INFO L85 PathProgramCache]: Analyzing trace with hash 688488293, now seen corresponding path program 1 times [2022-11-20 12:39:50,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:50,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953271848] [2022-11-20 12:39:50,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:50,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:50,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:50,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:50,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953271848] [2022-11-20 12:39:50,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953271848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:50,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:50,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:39:50,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596988320] [2022-11-20 12:39:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:50,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:39:50,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:50,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:39:50,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:39:50,276 INFO L87 Difference]: Start difference. First operand 310 states and 428 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:50,423 INFO L93 Difference]: Finished difference Result 397 states and 521 transitions. [2022-11-20 12:39:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:39:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-20 12:39:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:50,429 INFO L225 Difference]: With dead ends: 397 [2022-11-20 12:39:50,429 INFO L226 Difference]: Without dead ends: 397 [2022-11-20 12:39:50,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:39:50,432 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 126 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:50,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 243 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:39:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-20 12:39:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 307. [2022-11-20 12:39:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 238 states have (on average 1.6890756302521008) internal successors, (402), 292 states have internal predecessors, (402), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 422 transitions. [2022-11-20 12:39:50,447 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 422 transitions. Word has length 19 [2022-11-20 12:39:50,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:50,449 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 422 transitions. [2022-11-20 12:39:50,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 422 transitions. [2022-11-20 12:39:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 12:39:50,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:50,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:50,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:39:50,453 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash 688488294, now seen corresponding path program 1 times [2022-11-20 12:39:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:50,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153133445] [2022-11-20 12:39:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:50,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:50,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:50,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:50,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153133445] [2022-11-20 12:39:50,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153133445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:50,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:50,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:39:50,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988267544] [2022-11-20 12:39:50,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:50,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:50,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:50,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:50,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:50,584 INFO L87 Difference]: Start difference. First operand 307 states and 422 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:50,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:50,830 INFO L93 Difference]: Finished difference Result 520 states and 644 transitions. [2022-11-20 12:39:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:50,831 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-20 12:39:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:50,833 INFO L225 Difference]: With dead ends: 520 [2022-11-20 12:39:50,833 INFO L226 Difference]: Without dead ends: 520 [2022-11-20 12:39:50,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:50,834 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 271 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:50,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 424 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:50,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-20 12:39:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 310. [2022-11-20 12:39:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 242 states have (on average 1.6694214876033058) internal successors, (404), 295 states have internal predecessors, (404), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 424 transitions. [2022-11-20 12:39:50,846 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 424 transitions. Word has length 19 [2022-11-20 12:39:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:50,846 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 424 transitions. [2022-11-20 12:39:50,846 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:50,847 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 424 transitions. [2022-11-20 12:39:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 12:39:50,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:50,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:50,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:39:50,848 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash -131699369, now seen corresponding path program 1 times [2022-11-20 12:39:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:50,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316668159] [2022-11-20 12:39:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:50,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:50,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:50,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316668159] [2022-11-20 12:39:50,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316668159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:50,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:50,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:39:50,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117170177] [2022-11-20 12:39:50,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:50,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:50,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:50,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:50,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:50,980 INFO L87 Difference]: Start difference. First operand 310 states and 424 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:51,252 INFO L93 Difference]: Finished difference Result 519 states and 642 transitions. [2022-11-20 12:39:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-20 12:39:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:51,255 INFO L225 Difference]: With dead ends: 519 [2022-11-20 12:39:51,255 INFO L226 Difference]: Without dead ends: 519 [2022-11-20 12:39:51,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:51,256 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 270 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:51,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 468 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-20 12:39:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 312. [2022-11-20 12:39:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 244 states have (on average 1.6639344262295082) internal successors, (406), 297 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 12:39:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 426 transitions. [2022-11-20 12:39:51,268 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 426 transitions. Word has length 20 [2022-11-20 12:39:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:51,268 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 426 transitions. [2022-11-20 12:39:51,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 426 transitions. [2022-11-20 12:39:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 12:39:51,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:51,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:39:51,270 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash -131643665, now seen corresponding path program 1 times [2022-11-20 12:39:51,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:51,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034857537] [2022-11-20 12:39:51,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:51,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:51,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:51,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:51,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034857537] [2022-11-20 12:39:51,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034857537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:51,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:51,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:39:51,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220235058] [2022-11-20 12:39:51,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:51,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:39:51,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:39:51,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:39:51,473 INFO L87 Difference]: Start difference. First operand 312 states and 426 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:51,697 INFO L93 Difference]: Finished difference Result 528 states and 695 transitions. [2022-11-20 12:39:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:39:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-20 12:39:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:51,702 INFO L225 Difference]: With dead ends: 528 [2022-11-20 12:39:51,702 INFO L226 Difference]: Without dead ends: 528 [2022-11-20 12:39:51,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:39:51,703 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 325 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:51,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1068 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-11-20 12:39:51,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 340. [2022-11-20 12:39:51,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 267 states have (on average 1.6292134831460674) internal successors, (435), 321 states have internal predecessors, (435), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:51,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 465 transitions. [2022-11-20 12:39:51,726 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 465 transitions. Word has length 20 [2022-11-20 12:39:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:51,729 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 465 transitions. [2022-11-20 12:39:51,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 465 transitions. [2022-11-20 12:39:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 12:39:51,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:51,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:51,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:39:51,731 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:51,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:51,731 INFO L85 PathProgramCache]: Analyzing trace with hash -131641743, now seen corresponding path program 1 times [2022-11-20 12:39:51,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:51,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612525917] [2022-11-20 12:39:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:51,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612525917] [2022-11-20 12:39:51,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612525917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:51,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:51,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:39:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629044774] [2022-11-20 12:39:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:39:51,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:39:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:39:51,943 INFO L87 Difference]: Start difference. First operand 340 states and 465 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:52,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:52,182 INFO L93 Difference]: Finished difference Result 518 states and 681 transitions. [2022-11-20 12:39:52,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:39:52,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-20 12:39:52,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:52,186 INFO L225 Difference]: With dead ends: 518 [2022-11-20 12:39:52,186 INFO L226 Difference]: Without dead ends: 518 [2022-11-20 12:39:52,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:39:52,187 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 312 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:52,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1076 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-11-20 12:39:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 338. [2022-11-20 12:39:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 265 states have (on average 1.6264150943396227) internal successors, (431), 319 states have internal predecessors, (431), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 461 transitions. [2022-11-20 12:39:52,199 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 461 transitions. Word has length 20 [2022-11-20 12:39:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:52,200 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 461 transitions. [2022-11-20 12:39:52,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 461 transitions. [2022-11-20 12:39:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 12:39:52,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:52,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:52,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 12:39:52,202 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2560946, now seen corresponding path program 1 times [2022-11-20 12:39:52,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:52,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485035246] [2022-11-20 12:39:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:52,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:52,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:52,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485035246] [2022-11-20 12:39:52,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485035246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:52,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:52,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:39:52,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302690086] [2022-11-20 12:39:52,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:52,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:52,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:52,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:52,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:52,304 INFO L87 Difference]: Start difference. First operand 338 states and 461 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:52,562 INFO L93 Difference]: Finished difference Result 560 states and 700 transitions. [2022-11-20 12:39:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:52,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-20 12:39:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:52,567 INFO L225 Difference]: With dead ends: 560 [2022-11-20 12:39:52,567 INFO L226 Difference]: Without dead ends: 560 [2022-11-20 12:39:52,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:52,568 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 271 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:52,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 448 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:52,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-20 12:39:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 342. [2022-11-20 12:39:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 269 states have (on average 1.6171003717472119) internal successors, (435), 323 states have internal predecessors, (435), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 465 transitions. [2022-11-20 12:39:52,586 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 465 transitions. Word has length 20 [2022-11-20 12:39:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:52,586 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 465 transitions. [2022-11-20 12:39:52,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 465 transitions. [2022-11-20 12:39:52,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 12:39:52,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:52,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:52,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 12:39:52,588 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2559024, now seen corresponding path program 1 times [2022-11-20 12:39:52,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:52,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900295600] [2022-11-20 12:39:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:52,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:52,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:52,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:52,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900295600] [2022-11-20 12:39:52,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900295600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:52,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:52,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:39:52,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388562523] [2022-11-20 12:39:52,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:52,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:39:52,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:39:52,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:39:52,744 INFO L87 Difference]: Start difference. First operand 342 states and 465 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:52,962 INFO L93 Difference]: Finished difference Result 515 states and 675 transitions. [2022-11-20 12:39:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:39:52,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-20 12:39:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:52,967 INFO L225 Difference]: With dead ends: 515 [2022-11-20 12:39:52,968 INFO L226 Difference]: Without dead ends: 515 [2022-11-20 12:39:52,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:39:52,969 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 318 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:52,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 1304 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:39:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-11-20 12:39:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 337. [2022-11-20 12:39:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 265 states have (on average 1.6113207547169812) internal successors, (427), 318 states have internal predecessors, (427), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:52,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 457 transitions. [2022-11-20 12:39:52,986 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 457 transitions. Word has length 20 [2022-11-20 12:39:52,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:52,986 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 457 transitions. [2022-11-20 12:39:52,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:52,987 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 457 transitions. [2022-11-20 12:39:52,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 12:39:52,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:52,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:52,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 12:39:52,988 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:52,989 INFO L85 PathProgramCache]: Analyzing trace with hash 59872289, now seen corresponding path program 1 times [2022-11-20 12:39:52,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:52,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796504477] [2022-11-20 12:39:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:53,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:39:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:53,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:53,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796504477] [2022-11-20 12:39:53,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796504477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:53,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:53,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 12:39:53,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346210398] [2022-11-20 12:39:53,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:53,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:39:53,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:53,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:39:53,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:39:53,525 INFO L87 Difference]: Start difference. First operand 337 states and 457 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:54,469 INFO L93 Difference]: Finished difference Result 629 states and 815 transitions. [2022-11-20 12:39:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:39:54,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-20 12:39:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:54,473 INFO L225 Difference]: With dead ends: 629 [2022-11-20 12:39:54,473 INFO L226 Difference]: Without dead ends: 627 [2022-11-20 12:39:54,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:39:54,475 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 424 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:54,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1122 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:39:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-11-20 12:39:54,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 331. [2022-11-20 12:39:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 259 states have (on average 1.606177606177606) internal successors, (416), 312 states have internal predecessors, (416), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 446 transitions. [2022-11-20 12:39:54,500 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 446 transitions. Word has length 21 [2022-11-20 12:39:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:54,500 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 446 transitions. [2022-11-20 12:39:54,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 446 transitions. [2022-11-20 12:39:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 12:39:54,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:54,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:54,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 12:39:54,502 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash -79389329, now seen corresponding path program 1 times [2022-11-20 12:39:54,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:54,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383349409] [2022-11-20 12:39:54,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:54,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:54,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:54,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:54,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383349409] [2022-11-20 12:39:54,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383349409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:54,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:54,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:39:54,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996331086] [2022-11-20 12:39:54,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:54,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:54,638 INFO L87 Difference]: Start difference. First operand 331 states and 446 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:54,879 INFO L93 Difference]: Finished difference Result 545 states and 675 transitions. [2022-11-20 12:39:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:54,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-20 12:39:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:54,883 INFO L225 Difference]: With dead ends: 545 [2022-11-20 12:39:54,883 INFO L226 Difference]: Without dead ends: 545 [2022-11-20 12:39:54,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:54,884 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 329 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:54,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 402 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:39:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-20 12:39:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 324. [2022-11-20 12:39:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 253 states have (on average 1.6126482213438735) internal successors, (408), 305 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:54,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 438 transitions. [2022-11-20 12:39:54,895 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 438 transitions. Word has length 21 [2022-11-20 12:39:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:54,896 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 438 transitions. [2022-11-20 12:39:54,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 438 transitions. [2022-11-20 12:39:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 12:39:54,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:54,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:54,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 12:39:54,898 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:54,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1710334668, now seen corresponding path program 1 times [2022-11-20 12:39:54,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:54,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850313790] [2022-11-20 12:39:54,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:54,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:54,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:39:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:54,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:54,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850313790] [2022-11-20 12:39:54,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850313790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:54,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:54,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:39:54,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599727353] [2022-11-20 12:39:54,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:54,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:39:54,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:54,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:39:54,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:39:54,968 INFO L87 Difference]: Start difference. First operand 324 states and 438 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:55,260 INFO L93 Difference]: Finished difference Result 478 states and 615 transitions. [2022-11-20 12:39:55,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:39:55,263 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-20 12:39:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:55,266 INFO L225 Difference]: With dead ends: 478 [2022-11-20 12:39:55,267 INFO L226 Difference]: Without dead ends: 478 [2022-11-20 12:39:55,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:39:55,267 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 215 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:55,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 334 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:39:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-11-20 12:39:55,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 344. [2022-11-20 12:39:55,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.641025641025641) internal successors, (448), 325 states have internal predecessors, (448), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 478 transitions. [2022-11-20 12:39:55,278 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 478 transitions. Word has length 23 [2022-11-20 12:39:55,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:55,279 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 478 transitions. [2022-11-20 12:39:55,279 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 478 transitions. [2022-11-20 12:39:55,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 12:39:55,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:55,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:55,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 12:39:55,280 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:55,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1710334669, now seen corresponding path program 1 times [2022-11-20 12:39:55,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:55,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40512520] [2022-11-20 12:39:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:55,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:39:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:55,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:55,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40512520] [2022-11-20 12:39:55,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40512520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:55,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:55,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:39:55,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322531578] [2022-11-20 12:39:55,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:55,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:39:55,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:39:55,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:39:55,500 INFO L87 Difference]: Start difference. First operand 344 states and 478 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:55,865 INFO L93 Difference]: Finished difference Result 403 states and 509 transitions. [2022-11-20 12:39:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:39:55,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-11-20 12:39:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:55,869 INFO L225 Difference]: With dead ends: 403 [2022-11-20 12:39:55,869 INFO L226 Difference]: Without dead ends: 403 [2022-11-20 12:39:55,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:39:55,870 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 354 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:55,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 415 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:39:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-20 12:39:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 344. [2022-11-20 12:39:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.6080586080586081) internal successors, (439), 325 states have internal predecessors, (439), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 469 transitions. [2022-11-20 12:39:55,881 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 469 transitions. Word has length 23 [2022-11-20 12:39:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:55,882 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 469 transitions. [2022-11-20 12:39:55,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 469 transitions. [2022-11-20 12:39:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 12:39:55,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:55,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:55,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 12:39:55,884 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:55,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2045900250, now seen corresponding path program 1 times [2022-11-20 12:39:55,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:55,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486426918] [2022-11-20 12:39:55,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:55,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:56,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:56,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:56,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486426918] [2022-11-20 12:39:56,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486426918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:56,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:56,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:39:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010417105] [2022-11-20 12:39:56,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:56,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:39:56,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:56,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:39:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:39:56,311 INFO L87 Difference]: Start difference. First operand 344 states and 469 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:56,932 INFO L93 Difference]: Finished difference Result 763 states and 983 transitions. [2022-11-20 12:39:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:39:56,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-11-20 12:39:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:56,936 INFO L225 Difference]: With dead ends: 763 [2022-11-20 12:39:56,936 INFO L226 Difference]: Without dead ends: 763 [2022-11-20 12:39:56,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:39:56,941 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 382 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:56,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1297 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:39:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-11-20 12:39:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 376. [2022-11-20 12:39:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 305 states have (on average 1.5573770491803278) internal successors, (475), 355 states have internal predecessors, (475), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 505 transitions. [2022-11-20 12:39:56,962 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 505 transitions. Word has length 24 [2022-11-20 12:39:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:56,962 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 505 transitions. [2022-11-20 12:39:56,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:56,963 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 505 transitions. [2022-11-20 12:39:56,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 12:39:56,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:56,964 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] [2022-11-20 12:39:56,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 12:39:56,966 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:56,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1674205682, now seen corresponding path program 1 times [2022-11-20 12:39:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:56,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547210071] [2022-11-20 12:39:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:56,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:57,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:57,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:57,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547210071] [2022-11-20 12:39:57,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547210071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:57,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:57,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:39:57,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696800134] [2022-11-20 12:39:57,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:57,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:39:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:39:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:39:57,396 INFO L87 Difference]: Start difference. First operand 376 states and 505 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:57,910 INFO L93 Difference]: Finished difference Result 604 states and 769 transitions. [2022-11-20 12:39:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:39:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-20 12:39:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:57,914 INFO L225 Difference]: With dead ends: 604 [2022-11-20 12:39:57,914 INFO L226 Difference]: Without dead ends: 604 [2022-11-20 12:39:57,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:39:57,915 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 230 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:57,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1361 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:39:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-11-20 12:39:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 378. [2022-11-20 12:39:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 307 states have (on average 1.5537459283387622) internal successors, (477), 357 states have internal predecessors, (477), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:57,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 507 transitions. [2022-11-20 12:39:57,944 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 507 transitions. Word has length 25 [2022-11-20 12:39:57,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:57,944 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 507 transitions. [2022-11-20 12:39:57,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 507 transitions. [2022-11-20 12:39:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 12:39:57,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:57,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 12:39:57,947 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1383181005, now seen corresponding path program 1 times [2022-11-20 12:39:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:57,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247351854] [2022-11-20 12:39:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:57,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:58,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:39:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:58,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:58,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247351854] [2022-11-20 12:39:58,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247351854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:58,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:58,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:39:58,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547959841] [2022-11-20 12:39:58,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:58,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:39:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:39:58,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:39:58,121 INFO L87 Difference]: Start difference. First operand 378 states and 507 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:58,665 INFO L93 Difference]: Finished difference Result 897 states and 1200 transitions. [2022-11-20 12:39:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:39:58,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-11-20 12:39:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:58,669 INFO L225 Difference]: With dead ends: 897 [2022-11-20 12:39:58,670 INFO L226 Difference]: Without dead ends: 897 [2022-11-20 12:39:58,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:39:58,671 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 428 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:58,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 1159 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:39:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-11-20 12:39:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 473. [2022-11-20 12:39:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 402 states have (on average 1.5746268656716418) internal successors, (633), 447 states have internal predecessors, (633), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 20 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 663 transitions. [2022-11-20 12:39:58,708 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 663 transitions. Word has length 26 [2022-11-20 12:39:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:58,708 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 663 transitions. [2022-11-20 12:39:58,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:58,709 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 663 transitions. [2022-11-20 12:39:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 12:39:58,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:58,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:58,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 12:39:58,710 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash 872646828, now seen corresponding path program 1 times [2022-11-20 12:39:58,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:58,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737125555] [2022-11-20 12:39:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:58,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:39:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:58,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:58,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737125555] [2022-11-20 12:39:58,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737125555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:58,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:58,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:39:58,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066473878] [2022-11-20 12:39:58,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:58,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:39:58,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:58,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:39:58,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:39:58,887 INFO L87 Difference]: Start difference. First operand 473 states and 663 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:39:59,426 INFO L93 Difference]: Finished difference Result 894 states and 1190 transitions. [2022-11-20 12:39:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:39:59,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-11-20 12:39:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:39:59,430 INFO L225 Difference]: With dead ends: 894 [2022-11-20 12:39:59,430 INFO L226 Difference]: Without dead ends: 894 [2022-11-20 12:39:59,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:39:59,431 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 403 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:39:59,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1396 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:39:59,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-20 12:39:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 375. [2022-11-20 12:39:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 307 states have (on average 1.521172638436482) internal successors, (467), 354 states have internal predecessors, (467), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 15 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-20 12:39:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 497 transitions. [2022-11-20 12:39:59,451 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 497 transitions. Word has length 26 [2022-11-20 12:39:59,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:39:59,452 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 497 transitions. [2022-11-20 12:39:59,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:39:59,453 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 497 transitions. [2022-11-20 12:39:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 12:39:59,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:39:59,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:39:59,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 12:39:59,454 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:39:59,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:39:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash -984725155, now seen corresponding path program 1 times [2022-11-20 12:39:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:39:59,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170448152] [2022-11-20 12:39:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:39:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:39:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:59,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:39:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:39:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:39:59,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:39:59,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170448152] [2022-11-20 12:39:59,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170448152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:39:59,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:39:59,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:39:59,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406158495] [2022-11-20 12:39:59,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:39:59,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:39:59,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:39:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:39:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:39:59,713 INFO L87 Difference]: Start difference. First operand 375 states and 497 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:00,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:00,105 INFO L93 Difference]: Finished difference Result 487 states and 597 transitions. [2022-11-20 12:40:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:40:00,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-11-20 12:40:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:00,108 INFO L225 Difference]: With dead ends: 487 [2022-11-20 12:40:00,108 INFO L226 Difference]: Without dead ends: 487 [2022-11-20 12:40:00,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:40:00,109 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 677 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:00,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 335 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:40:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-20 12:40:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 386. [2022-11-20 12:40:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 323 states have (on average 1.501547987616099) internal successors, (485), 364 states have internal predecessors, (485), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-20 12:40:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 518 transitions. [2022-11-20 12:40:00,123 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 518 transitions. Word has length 26 [2022-11-20 12:40:00,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:00,123 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 518 transitions. [2022-11-20 12:40:00,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:00,124 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 518 transitions. [2022-11-20 12:40:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 12:40:00,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:00,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:00,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 12:40:00,125 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash -71084525, now seen corresponding path program 1 times [2022-11-20 12:40:00,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:00,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265681520] [2022-11-20 12:40:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:00,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:00,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:40:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:00,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:00,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265681520] [2022-11-20 12:40:00,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265681520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:00,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:00,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:40:00,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165013743] [2022-11-20 12:40:00,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:00,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:40:00,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:00,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:40:00,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:40:00,330 INFO L87 Difference]: Start difference. First operand 386 states and 518 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:00,545 INFO L93 Difference]: Finished difference Result 436 states and 562 transitions. [2022-11-20 12:40:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:40:00,546 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-20 12:40:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:00,548 INFO L225 Difference]: With dead ends: 436 [2022-11-20 12:40:00,548 INFO L226 Difference]: Without dead ends: 436 [2022-11-20 12:40:00,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:40:00,549 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 137 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:00,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 486 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:40:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-20 12:40:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 386. [2022-11-20 12:40:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 323 states have (on average 1.498452012383901) internal successors, (484), 364 states have internal predecessors, (484), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-20 12:40:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 517 transitions. [2022-11-20 12:40:00,561 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 517 transitions. Word has length 27 [2022-11-20 12:40:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:00,562 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 517 transitions. [2022-11-20 12:40:00,562 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:00,562 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 517 transitions. [2022-11-20 12:40:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 12:40:00,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:00,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:00,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 12:40:00,565 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash -461708714, now seen corresponding path program 1 times [2022-11-20 12:40:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:00,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684317766] [2022-11-20 12:40:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:00,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:00,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684317766] [2022-11-20 12:40:00,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684317766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:00,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:00,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:40:00,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411840870] [2022-11-20 12:40:00,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:00,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:40:00,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:00,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:40:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:40:00,736 INFO L87 Difference]: Start difference. First operand 386 states and 517 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:00,998 INFO L93 Difference]: Finished difference Result 421 states and 528 transitions. [2022-11-20 12:40:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:40:00,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-20 12:40:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:01,001 INFO L225 Difference]: With dead ends: 421 [2022-11-20 12:40:01,001 INFO L226 Difference]: Without dead ends: 421 [2022-11-20 12:40:01,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:40:01,002 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 366 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:01,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 637 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:40:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-20 12:40:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 384. [2022-11-20 12:40:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 323 states have (on average 1.4860681114551084) internal successors, (480), 362 states have internal predecessors, (480), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-20 12:40:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 513 transitions. [2022-11-20 12:40:01,023 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 513 transitions. Word has length 27 [2022-11-20 12:40:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:01,023 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 513 transitions. [2022-11-20 12:40:01,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 513 transitions. [2022-11-20 12:40:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:40:01,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:01,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:01,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-20 12:40:01,025 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2092055213, now seen corresponding path program 1 times [2022-11-20 12:40:01,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:01,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459415875] [2022-11-20 12:40:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:01,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:01,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:40:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:01,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:01,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:01,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459415875] [2022-11-20 12:40:01,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459415875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:01,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:01,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:40:01,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744505816] [2022-11-20 12:40:01,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:01,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:40:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:01,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:40:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:40:01,435 INFO L87 Difference]: Start difference. First operand 384 states and 513 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:01,801 INFO L93 Difference]: Finished difference Result 416 states and 534 transitions. [2022-11-20 12:40:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:40:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-20 12:40:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:01,804 INFO L225 Difference]: With dead ends: 416 [2022-11-20 12:40:01,804 INFO L226 Difference]: Without dead ends: 416 [2022-11-20 12:40:01,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:40:01,805 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 113 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:01,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 595 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:40:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-20 12:40:01,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 378. [2022-11-20 12:40:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 317 states have (on average 1.476340694006309) internal successors, (468), 356 states have internal predecessors, (468), 11 states have call successors, (11), 5 states have call predecessors, (11), 10 states have return successors, (22), 16 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-20 12:40:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 501 transitions. [2022-11-20 12:40:01,816 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 501 transitions. Word has length 28 [2022-11-20 12:40:01,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:01,817 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 501 transitions. [2022-11-20 12:40:01,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 501 transitions. [2022-11-20 12:40:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:40:01,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:01,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:01,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 12:40:01,819 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:01,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2091347212, now seen corresponding path program 1 times [2022-11-20 12:40:01,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:01,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475096308] [2022-11-20 12:40:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:01,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:02,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:40:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:02,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475096308] [2022-11-20 12:40:02,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475096308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:02,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:02,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:40:02,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785311435] [2022-11-20 12:40:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:40:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:40:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:40:02,054 INFO L87 Difference]: Start difference. First operand 378 states and 501 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:02,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:02,331 INFO L93 Difference]: Finished difference Result 497 states and 638 transitions. [2022-11-20 12:40:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:40:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-11-20 12:40:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:02,334 INFO L225 Difference]: With dead ends: 497 [2022-11-20 12:40:02,335 INFO L226 Difference]: Without dead ends: 497 [2022-11-20 12:40:02,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:40:02,335 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 164 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:02,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 461 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:40:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-11-20 12:40:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 416. [2022-11-20 12:40:02,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 351 states have (on average 1.4757834757834758) internal successors, (518), 392 states have internal predecessors, (518), 13 states have call successors, (13), 6 states have call predecessors, (13), 12 states have return successors, (26), 17 states have call predecessors, (26), 13 states have call successors, (26) [2022-11-20 12:40:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 557 transitions. [2022-11-20 12:40:02,355 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 557 transitions. Word has length 28 [2022-11-20 12:40:02,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:02,356 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 557 transitions. [2022-11-20 12:40:02,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 557 transitions. [2022-11-20 12:40:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 12:40:02,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:02,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 12:40:02,358 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1320441736, now seen corresponding path program 1 times [2022-11-20 12:40:02,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:02,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814635728] [2022-11-20 12:40:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:02,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:02,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:02,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:02,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814635728] [2022-11-20 12:40:02,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814635728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:02,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:02,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:40:02,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940193593] [2022-11-20 12:40:02,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:02,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:40:02,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:02,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:40:02,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:40:02,660 INFO L87 Difference]: Start difference. First operand 416 states and 557 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:03,065 INFO L93 Difference]: Finished difference Result 518 states and 633 transitions. [2022-11-20 12:40:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:40:03,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-11-20 12:40:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:03,068 INFO L225 Difference]: With dead ends: 518 [2022-11-20 12:40:03,068 INFO L226 Difference]: Without dead ends: 518 [2022-11-20 12:40:03,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:40:03,069 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 866 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:03,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 259 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:40:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-11-20 12:40:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 419. [2022-11-20 12:40:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 355 states have (on average 1.4647887323943662) internal successors, (520), 393 states have internal predecessors, (520), 14 states have call successors, (14), 6 states have call predecessors, (14), 12 states have return successors, (28), 19 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-20 12:40:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 562 transitions. [2022-11-20 12:40:03,080 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 562 transitions. Word has length 29 [2022-11-20 12:40:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:03,081 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 562 transitions. [2022-11-20 12:40:03,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 562 transitions. [2022-11-20 12:40:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 12:40:03,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:03,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:03,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-20 12:40:03,082 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:03,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash -260017618, now seen corresponding path program 1 times [2022-11-20 12:40:03,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:03,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830505537] [2022-11-20 12:40:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:03,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:03,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:40:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:03,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:03,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:03,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830505537] [2022-11-20 12:40:03,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830505537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:03,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:03,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:40:03,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416952612] [2022-11-20 12:40:03,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:03,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:40:03,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:03,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:40:03,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:40:03,328 INFO L87 Difference]: Start difference. First operand 419 states and 562 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:03,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:03,998 INFO L93 Difference]: Finished difference Result 746 states and 989 transitions. [2022-11-20 12:40:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:40:03,999 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-20 12:40:03,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:04,002 INFO L225 Difference]: With dead ends: 746 [2022-11-20 12:40:04,002 INFO L226 Difference]: Without dead ends: 746 [2022-11-20 12:40:04,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:40:04,003 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 339 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:04,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 691 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:40:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-20 12:40:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 459. [2022-11-20 12:40:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 391 states have (on average 1.4526854219948848) internal successors, (568), 431 states have internal predecessors, (568), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 20 states have call predecessors, (32), 16 states have call successors, (32) [2022-11-20 12:40:04,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 616 transitions. [2022-11-20 12:40:04,017 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 616 transitions. Word has length 30 [2022-11-20 12:40:04,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:04,017 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 616 transitions. [2022-11-20 12:40:04,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 616 transitions. [2022-11-20 12:40:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 12:40:04,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:04,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:04,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-20 12:40:04,019 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:04,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:04,019 INFO L85 PathProgramCache]: Analyzing trace with hash 529388631, now seen corresponding path program 1 times [2022-11-20 12:40:04,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:04,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676570163] [2022-11-20 12:40:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:04,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:04,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:40:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:04,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:04,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676570163] [2022-11-20 12:40:04,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676570163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:04,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:04,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:40:04,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423255541] [2022-11-20 12:40:04,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:04,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:40:04,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:04,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:40:04,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:40:04,343 INFO L87 Difference]: Start difference. First operand 459 states and 616 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:04,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:04,923 INFO L93 Difference]: Finished difference Result 520 states and 657 transitions. [2022-11-20 12:40:04,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:40:04,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-11-20 12:40:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:04,927 INFO L225 Difference]: With dead ends: 520 [2022-11-20 12:40:04,927 INFO L226 Difference]: Without dead ends: 520 [2022-11-20 12:40:04,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:40:04,928 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 424 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:04,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 498 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:40:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-20 12:40:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 459. [2022-11-20 12:40:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 391 states have (on average 1.4424552429667519) internal successors, (564), 431 states have internal predecessors, (564), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 20 states have call predecessors, (32), 16 states have call successors, (32) [2022-11-20 12:40:04,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 612 transitions. [2022-11-20 12:40:04,944 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 612 transitions. Word has length 31 [2022-11-20 12:40:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:04,944 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 612 transitions. [2022-11-20 12:40:04,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 612 transitions. [2022-11-20 12:40:04,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 12:40:04,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:04,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:04,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-20 12:40:04,946 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:04,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:04,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1684807341, now seen corresponding path program 1 times [2022-11-20 12:40:04,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:04,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49077141] [2022-11-20 12:40:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:04,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:05,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:05,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 12:40:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:40:05,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:05,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49077141] [2022-11-20 12:40:05,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49077141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:05,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641125103] [2022-11-20 12:40:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:05,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:05,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:05,629 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:05,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:40:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:05,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 12:40:05,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:06,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:06,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:40:06,659 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 30 treesize of output 34 [2022-11-20 12:40:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:40:06,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641125103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:06,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:06,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 8] total 26 [2022-11-20 12:40:06,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695199697] [2022-11-20 12:40:06,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:06,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 12:40:06,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:06,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 12:40:06,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 12:40:06,985 INFO L87 Difference]: Start difference. First operand 459 states and 612 transitions. Second operand has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 12:40:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:08,416 INFO L93 Difference]: Finished difference Result 694 states and 875 transitions. [2022-11-20 12:40:08,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:40:08,417 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-11-20 12:40:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:08,421 INFO L225 Difference]: With dead ends: 694 [2022-11-20 12:40:08,422 INFO L226 Difference]: Without dead ends: 694 [2022-11-20 12:40:08,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 12:40:08,424 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1538 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:08,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1542 Valid, 1449 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:40:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-20 12:40:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 454. [2022-11-20 12:40:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 387 states have (on average 1.426356589147287) internal successors, (552), 428 states have internal predecessors, (552), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 18 states have call predecessors, (32), 16 states have call successors, (32) [2022-11-20 12:40:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 600 transitions. [2022-11-20 12:40:08,445 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 600 transitions. Word has length 40 [2022-11-20 12:40:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:08,446 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 600 transitions. [2022-11-20 12:40:08,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 23 states have internal predecessors, (103), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 12:40:08,446 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 600 transitions. [2022-11-20 12:40:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 12:40:08,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:08,447 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:08,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:40:08,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:08,654 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:08,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1517564365, now seen corresponding path program 1 times [2022-11-20 12:40:08,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:08,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424952557] [2022-11-20 12:40:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:08,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:09,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:09,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:09,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424952557] [2022-11-20 12:40:09,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424952557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:09,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:09,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 12:40:09,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233117795] [2022-11-20 12:40:09,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:40:09,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:09,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:40:09,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:40:09,206 INFO L87 Difference]: Start difference. First operand 454 states and 600 transitions. Second operand has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:10,231 INFO L93 Difference]: Finished difference Result 749 states and 926 transitions. [2022-11-20 12:40:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:40:10,232 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-20 12:40:10,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:10,235 INFO L225 Difference]: With dead ends: 749 [2022-11-20 12:40:10,235 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 12:40:10,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:40:10,237 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1035 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:10,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 972 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:40:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 12:40:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 606. [2022-11-20 12:40:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 529 states have (on average 1.448015122873346) internal successors, (766), 575 states have internal predecessors, (766), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2022-11-20 12:40:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 832 transitions. [2022-11-20 12:40:10,256 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 832 transitions. Word has length 40 [2022-11-20 12:40:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:10,257 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 832 transitions. [2022-11-20 12:40:10,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 832 transitions. [2022-11-20 12:40:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 12:40:10,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:10,258 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:10,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-20 12:40:10,259 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:10,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1517564303, now seen corresponding path program 1 times [2022-11-20 12:40:10,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:10,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59823686] [2022-11-20 12:40:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:10,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:10,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:10,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:10,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59823686] [2022-11-20 12:40:10,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59823686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:10,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:10,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:40:10,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569545472] [2022-11-20 12:40:10,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:10,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:40:10,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:10,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:40:10,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:40:10,486 INFO L87 Difference]: Start difference. First operand 606 states and 832 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:10,790 INFO L93 Difference]: Finished difference Result 685 states and 891 transitions. [2022-11-20 12:40:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:40:10,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-20 12:40:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:10,794 INFO L225 Difference]: With dead ends: 685 [2022-11-20 12:40:10,795 INFO L226 Difference]: Without dead ends: 685 [2022-11-20 12:40:10,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:40:10,796 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 364 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:10,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 482 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:40:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-11-20 12:40:10,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 602. [2022-11-20 12:40:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 525 states have (on average 1.4476190476190476) internal successors, (760), 571 states have internal predecessors, (760), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2022-11-20 12:40:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 826 transitions. [2022-11-20 12:40:10,814 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 826 transitions. Word has length 40 [2022-11-20 12:40:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:10,815 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 826 transitions. [2022-11-20 12:40:10,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 826 transitions. [2022-11-20 12:40:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 12:40:10,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:10,817 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:10,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-20 12:40:10,817 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:10,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:10,818 INFO L85 PathProgramCache]: Analyzing trace with hash 767299090, now seen corresponding path program 1 times [2022-11-20 12:40:10,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:10,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984283890] [2022-11-20 12:40:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:10,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:10,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:11,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:11,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:11,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984283890] [2022-11-20 12:40:11,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984283890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:11,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:11,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:40:11,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582979400] [2022-11-20 12:40:11,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:11,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:40:11,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:40:11,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:40:11,061 INFO L87 Difference]: Start difference. First operand 602 states and 826 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:11,235 INFO L93 Difference]: Finished difference Result 655 states and 846 transitions. [2022-11-20 12:40:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:40:11,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-20 12:40:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:11,239 INFO L225 Difference]: With dead ends: 655 [2022-11-20 12:40:11,239 INFO L226 Difference]: Without dead ends: 655 [2022-11-20 12:40:11,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:40:11,240 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 268 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:11,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 905 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:40:11,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-20 12:40:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 602. [2022-11-20 12:40:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 525 states have (on average 1.44) internal successors, (756), 571 states have internal predecessors, (756), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2022-11-20 12:40:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 822 transitions. [2022-11-20 12:40:11,257 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 822 transitions. Word has length 40 [2022-11-20 12:40:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:11,258 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 822 transitions. [2022-11-20 12:40:11,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 822 transitions. [2022-11-20 12:40:11,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 12:40:11,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:11,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:11,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-20 12:40:11,260 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1078522670, now seen corresponding path program 1 times [2022-11-20 12:40:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:11,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203046772] [2022-11-20 12:40:11,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:11,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:11,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:11,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:11,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-20 12:40:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:40:11,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:11,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203046772] [2022-11-20 12:40:11,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203046772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:11,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:11,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:40:11,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848057155] [2022-11-20 12:40:11,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:11,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:40:11,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:11,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:40:11,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:40:11,532 INFO L87 Difference]: Start difference. First operand 602 states and 822 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:40:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:11,833 INFO L93 Difference]: Finished difference Result 729 states and 957 transitions. [2022-11-20 12:40:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:40:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-11-20 12:40:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:11,837 INFO L225 Difference]: With dead ends: 729 [2022-11-20 12:40:11,837 INFO L226 Difference]: Without dead ends: 729 [2022-11-20 12:40:11,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:40:11,838 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 339 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:11,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 326 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:40:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-11-20 12:40:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 600. [2022-11-20 12:40:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 525 states have (on average 1.417142857142857) internal successors, (744), 569 states have internal predecessors, (744), 22 states have call successors, (22), 9 states have call predecessors, (22), 18 states have return successors, (44), 21 states have call predecessors, (44), 22 states have call successors, (44) [2022-11-20 12:40:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 810 transitions. [2022-11-20 12:40:11,856 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 810 transitions. Word has length 42 [2022-11-20 12:40:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:11,856 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 810 transitions. [2022-11-20 12:40:11,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:40:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 810 transitions. [2022-11-20 12:40:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 12:40:11,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:11,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-20 12:40:11,859 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:11,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash -905379253, now seen corresponding path program 1 times [2022-11-20 12:40:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:11,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596394179] [2022-11-20 12:40:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:12,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:12,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:12,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596394179] [2022-11-20 12:40:12,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596394179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:12,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:12,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:40:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626798698] [2022-11-20 12:40:12,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:12,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:40:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:40:12,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:40:12,122 INFO L87 Difference]: Start difference. First operand 600 states and 810 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:12,360 INFO L93 Difference]: Finished difference Result 682 states and 873 transitions. [2022-11-20 12:40:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:40:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-11-20 12:40:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:12,364 INFO L225 Difference]: With dead ends: 682 [2022-11-20 12:40:12,364 INFO L226 Difference]: Without dead ends: 682 [2022-11-20 12:40:12,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:40:12,365 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 325 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:12,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 429 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:40:12,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-20 12:40:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 445. [2022-11-20 12:40:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 381 states have (on average 1.3937007874015748) internal successors, (531), 419 states have internal predecessors, (531), 16 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (32), 18 states have call predecessors, (32), 16 states have call successors, (32) [2022-11-20 12:40:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 579 transitions. [2022-11-20 12:40:12,380 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 579 transitions. Word has length 41 [2022-11-20 12:40:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:12,381 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 579 transitions. [2022-11-20 12:40:12,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 579 transitions. [2022-11-20 12:40:12,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 12:40:12,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:12,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:12,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-20 12:40:12,383 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:12,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash -940574757, now seen corresponding path program 1 times [2022-11-20 12:40:12,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:12,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235322956] [2022-11-20 12:40:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:12,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:12,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:40:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:12,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:40:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:40:12,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:12,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235322956] [2022-11-20 12:40:12,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235322956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:12,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425004669] [2022-11-20 12:40:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:12,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:12,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:12,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:12,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:40:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 12:40:12,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:12,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:12,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:12,921 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 12:40:12,922 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 12 treesize of output 11 [2022-11-20 12:40:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:40:12,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425004669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:12,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:12,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-20 12:40:12,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116287805] [2022-11-20 12:40:12,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:40:12,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:12,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:40:12,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:40:12,963 INFO L87 Difference]: Start difference. First operand 445 states and 579 transitions. Second operand has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:40:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:13,893 INFO L93 Difference]: Finished difference Result 1350 states and 1684 transitions. [2022-11-20 12:40:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:40:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-11-20 12:40:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:13,899 INFO L225 Difference]: With dead ends: 1350 [2022-11-20 12:40:13,899 INFO L226 Difference]: Without dead ends: 1350 [2022-11-20 12:40:13,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:40:13,900 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 1696 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:13,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1698 Valid, 901 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:40:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2022-11-20 12:40:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 547. [2022-11-20 12:40:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 475 states have (on average 1.3094736842105263) internal successors, (622), 510 states have internal predecessors, (622), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 26 states have call predecessors, (48), 24 states have call successors, (48) [2022-11-20 12:40:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 694 transitions. [2022-11-20 12:40:13,926 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 694 transitions. Word has length 43 [2022-11-20 12:40:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:13,927 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 694 transitions. [2022-11-20 12:40:13,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.181818181818182) internal successors, (79), 12 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 12:40:13,927 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 694 transitions. [2022-11-20 12:40:13,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 12:40:13,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:13,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:13,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:14,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-20 12:40:14,136 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:14,137 INFO L85 PathProgramCache]: Analyzing trace with hash -934084823, now seen corresponding path program 1 times [2022-11-20 12:40:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:14,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881464472] [2022-11-20 12:40:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:14,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:16,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:16,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:16,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881464472] [2022-11-20 12:40:16,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881464472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:16,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:16,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 12:40:16,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611331297] [2022-11-20 12:40:16,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:16,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:40:16,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:16,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:40:16,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:40:16,359 INFO L87 Difference]: Start difference. First operand 547 states and 694 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:17,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:17,871 INFO L93 Difference]: Finished difference Result 569 states and 716 transitions. [2022-11-20 12:40:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:40:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-11-20 12:40:17,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:17,874 INFO L225 Difference]: With dead ends: 569 [2022-11-20 12:40:17,874 INFO L226 Difference]: Without dead ends: 569 [2022-11-20 12:40:17,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:40:17,875 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 122 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:17,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 932 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:40:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-20 12:40:17,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 561. [2022-11-20 12:40:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 489 states have (on average 1.3047034764826175) internal successors, (638), 524 states have internal predecessors, (638), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 26 states have call predecessors, (48), 24 states have call successors, (48) [2022-11-20 12:40:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 710 transitions. [2022-11-20 12:40:17,892 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 710 transitions. Word has length 43 [2022-11-20 12:40:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:17,894 INFO L495 AbstractCegarLoop]: Abstraction has 561 states and 710 transitions. [2022-11-20 12:40:17,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 710 transitions. [2022-11-20 12:40:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:40:17,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:17,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-20 12:40:17,897 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1138243033, now seen corresponding path program 1 times [2022-11-20 12:40:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:17,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868579216] [2022-11-20 12:40:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:18,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:18,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:18,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868579216] [2022-11-20 12:40:18,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868579216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:18,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:18,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 12:40:18,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894802756] [2022-11-20 12:40:18,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:18,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:40:18,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:40:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:40:18,510 INFO L87 Difference]: Start difference. First operand 561 states and 710 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:19,114 INFO L93 Difference]: Finished difference Result 899 states and 1131 transitions. [2022-11-20 12:40:19,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:40:19,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-20 12:40:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:19,119 INFO L225 Difference]: With dead ends: 899 [2022-11-20 12:40:19,119 INFO L226 Difference]: Without dead ends: 899 [2022-11-20 12:40:19,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:40:19,120 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 983 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:19,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 1216 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:40:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-11-20 12:40:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 619. [2022-11-20 12:40:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 547 states have (on average 1.2888482632541134) internal successors, (705), 582 states have internal predecessors, (705), 24 states have call successors, (24), 10 states have call predecessors, (24), 20 states have return successors, (48), 26 states have call predecessors, (48), 24 states have call successors, (48) [2022-11-20 12:40:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 777 transitions. [2022-11-20 12:40:19,165 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 777 transitions. Word has length 44 [2022-11-20 12:40:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:19,165 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 777 transitions. [2022-11-20 12:40:19,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 777 transitions. [2022-11-20 12:40:19,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:40:19,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:19,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:19,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-20 12:40:19,167 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:19,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1516678113, now seen corresponding path program 1 times [2022-11-20 12:40:19,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:19,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036826568] [2022-11-20 12:40:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:19,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:21,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:21,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:21,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036826568] [2022-11-20 12:40:21,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036826568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:21,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358563137] [2022-11-20 12:40:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:21,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:21,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:21,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:21,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:40:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:21,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 12:40:21,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:22,202 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:40:22,727 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 15 treesize of output 11 [2022-11-20 12:40:22,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:22,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-20 12:40:23,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:40:23,375 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-20 12:40:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:23,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:40:23,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358563137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:23,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:40:23,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [20] total 32 [2022-11-20 12:40:23,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804662672] [2022-11-20 12:40:23,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:23,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:40:23,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:23,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:40:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 12:40:23,420 INFO L87 Difference]: Start difference. First operand 619 states and 777 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:23,982 INFO L93 Difference]: Finished difference Result 839 states and 1042 transitions. [2022-11-20 12:40:23,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 12:40:23,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-20 12:40:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:23,986 INFO L225 Difference]: With dead ends: 839 [2022-11-20 12:40:23,986 INFO L226 Difference]: Without dead ends: 839 [2022-11-20 12:40:23,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=206, Invalid=1354, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 12:40:23,988 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 194 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:23,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 923 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 291 Unchecked, 0.2s Time] [2022-11-20 12:40:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-11-20 12:40:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 740. [2022-11-20 12:40:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 657 states have (on average 1.2831050228310503) internal successors, (843), 695 states have internal predecessors, (843), 30 states have call successors, (30), 13 states have call predecessors, (30), 26 states have return successors, (60), 31 states have call predecessors, (60), 30 states have call successors, (60) [2022-11-20 12:40:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 933 transitions. [2022-11-20 12:40:24,010 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 933 transitions. Word has length 44 [2022-11-20 12:40:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:24,011 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 933 transitions. [2022-11-20 12:40:24,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:24,011 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 933 transitions. [2022-11-20 12:40:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:40:24,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:24,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:24,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:24,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-20 12:40:24,220 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:24,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1516678114, now seen corresponding path program 1 times [2022-11-20 12:40:24,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:24,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295840952] [2022-11-20 12:40:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:24,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:27,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:27,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:27,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295840952] [2022-11-20 12:40:27,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295840952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:27,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636918620] [2022-11-20 12:40:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:27,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:27,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:27,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:27,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:40:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:27,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 12:40:27,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:27,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:40:28,257 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 15 treesize of output 11 [2022-11-20 12:40:28,267 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 15 treesize of output 11 [2022-11-20 12:40:28,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:28,437 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 27 treesize of output 26 [2022-11-20 12:40:28,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:28,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-20 12:40:28,690 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 21 treesize of output 9 [2022-11-20 12:40:28,698 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 19 treesize of output 7 [2022-11-20 12:40:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:28,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:40:28,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636918620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:28,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:40:28,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [20] total 33 [2022-11-20 12:40:28,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12404820] [2022-11-20 12:40:28,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:28,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:40:28,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:28,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:40:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 12:40:28,811 INFO L87 Difference]: Start difference. First operand 740 states and 933 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:30,765 INFO L93 Difference]: Finished difference Result 1128 states and 1394 transitions. [2022-11-20 12:40:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:40:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-20 12:40:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:30,771 INFO L225 Difference]: With dead ends: 1128 [2022-11-20 12:40:30,771 INFO L226 Difference]: Without dead ends: 1128 [2022-11-20 12:40:30,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=306, Invalid=1950, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 12:40:30,773 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 1086 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:30,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1088 Valid, 1346 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:40:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-11-20 12:40:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 886. [2022-11-20 12:40:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 787 states have (on average 1.2998729351969505) internal successors, (1023), 833 states have internal predecessors, (1023), 40 states have call successors, (40), 16 states have call predecessors, (40), 32 states have return successors, (80), 36 states have call predecessors, (80), 40 states have call successors, (80) [2022-11-20 12:40:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1143 transitions. [2022-11-20 12:40:30,816 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1143 transitions. Word has length 44 [2022-11-20 12:40:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:30,817 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1143 transitions. [2022-11-20 12:40:30,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1143 transitions. [2022-11-20 12:40:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:40:30,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:30,822 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:30,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:31,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-20 12:40:31,031 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:31,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1518525155, now seen corresponding path program 1 times [2022-11-20 12:40:31,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:31,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810026996] [2022-11-20 12:40:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:32,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:32,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810026996] [2022-11-20 12:40:32,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810026996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215095092] [2022-11-20 12:40:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:32,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:32,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:32,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:32,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:40:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:32,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 12:40:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:33,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:40:33,498 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 15 treesize of output 11 [2022-11-20 12:40:33,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:40:33,811 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-11-20 12:40:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:33,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:40:33,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215095092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:33,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:40:33,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 27 [2022-11-20 12:40:33,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015199237] [2022-11-20 12:40:33,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:33,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:40:33,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:40:33,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:40:33,854 INFO L87 Difference]: Start difference. First operand 886 states and 1143 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:34,633 INFO L93 Difference]: Finished difference Result 1509 states and 1968 transitions. [2022-11-20 12:40:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:40:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-20 12:40:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:34,649 INFO L225 Difference]: With dead ends: 1509 [2022-11-20 12:40:34,658 INFO L226 Difference]: Without dead ends: 1509 [2022-11-20 12:40:34,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 12:40:34,659 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 492 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:34,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1156 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 651 Invalid, 0 Unknown, 234 Unchecked, 0.6s Time] [2022-11-20 12:40:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-11-20 12:40:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1369. [2022-11-20 12:40:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1229 states have (on average 1.3189585028478439) internal successors, (1621), 1290 states have internal predecessors, (1621), 69 states have call successors, (69), 22 states have call predecessors, (69), 44 states have return successors, (138), 56 states have call predecessors, (138), 69 states have call successors, (138) [2022-11-20 12:40:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1828 transitions. [2022-11-20 12:40:34,724 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1828 transitions. Word has length 44 [2022-11-20 12:40:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:34,724 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 1828 transitions. [2022-11-20 12:40:34,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1828 transitions. [2022-11-20 12:40:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:40:34,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:34,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:34,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:34,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 12:40:34,934 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:34,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1518525156, now seen corresponding path program 1 times [2022-11-20 12:40:34,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:34,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725458897] [2022-11-20 12:40:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:34,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:37,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:37,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725458897] [2022-11-20 12:40:37,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725458897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:37,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968172300] [2022-11-20 12:40:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:37,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:37,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:37,101 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:37,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:40:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:37,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 12:40:37,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:37,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:40:38,039 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 15 treesize of output 11 [2022-11-20 12:40:38,047 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 15 treesize of output 11 [2022-11-20 12:40:38,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:40:38,449 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 12:40:38,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:40:38,456 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-11-20 12:40:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:38,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:40:38,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968172300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:38,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:40:38,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [20] total 31 [2022-11-20 12:40:38,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552172916] [2022-11-20 12:40:38,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:38,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:40:38,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:38,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:40:38,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:40:38,573 INFO L87 Difference]: Start difference. First operand 1369 states and 1828 transitions. Second operand has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:39,270 INFO L93 Difference]: Finished difference Result 1465 states and 1912 transitions. [2022-11-20 12:40:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:40:39,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-11-20 12:40:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:39,286 INFO L225 Difference]: With dead ends: 1465 [2022-11-20 12:40:39,286 INFO L226 Difference]: Without dead ends: 1465 [2022-11-20 12:40:39,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 12:40:39,288 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 543 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:39,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 1035 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 361 Invalid, 0 Unknown, 181 Unchecked, 0.4s Time] [2022-11-20 12:40:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-11-20 12:40:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1365. [2022-11-20 12:40:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1225 states have (on average 1.3183673469387756) internal successors, (1615), 1286 states have internal predecessors, (1615), 69 states have call successors, (69), 22 states have call predecessors, (69), 44 states have return successors, (138), 56 states have call predecessors, (138), 69 states have call successors, (138) [2022-11-20 12:40:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1822 transitions. [2022-11-20 12:40:39,325 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1822 transitions. Word has length 44 [2022-11-20 12:40:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:39,326 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 1822 transitions. [2022-11-20 12:40:39,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1822 transitions. [2022-11-20 12:40:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:40:39,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:39,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:39,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:39,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:39,535 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:39,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1948359968, now seen corresponding path program 1 times [2022-11-20 12:40:39,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:39,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562028348] [2022-11-20 12:40:39,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:39,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:39,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:40:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:39,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562028348] [2022-11-20 12:40:39,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562028348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916561624] [2022-11-20 12:40:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:39,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:39,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:39,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:39,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:40:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:39,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 12:40:39,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:40,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:40:40,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 12:40:40,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:40:40,372 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-20 12:40:40,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:40:40,379 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-20 12:40:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:40,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:40:40,536 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 46 treesize of output 38 [2022-11-20 12:40:40,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:40,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:40,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916561624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:40:40,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:40:40,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 18 [2022-11-20 12:40:40,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779635161] [2022-11-20 12:40:40,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:40:40,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 12:40:40,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:40,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 12:40:40,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-11-20 12:40:40,766 INFO L87 Difference]: Start difference. First operand 1365 states and 1822 transitions. Second operand has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:40:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:42,077 INFO L93 Difference]: Finished difference Result 2122 states and 2827 transitions. [2022-11-20 12:40:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:40:42,078 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-20 12:40:42,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:42,084 INFO L225 Difference]: With dead ends: 2122 [2022-11-20 12:40:42,084 INFO L226 Difference]: Without dead ends: 2122 [2022-11-20 12:40:42,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2022-11-20 12:40:42,085 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 922 mSDsluCounter, 2091 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:42,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 2292 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:40:42,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-11-20 12:40:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1094. [2022-11-20 12:40:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 969 states have (on average 1.330237358101135) internal successors, (1289), 1027 states have internal predecessors, (1289), 56 states have call successors, (56), 21 states have call predecessors, (56), 42 states have return successors, (112), 45 states have call predecessors, (112), 56 states have call successors, (112) [2022-11-20 12:40:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1457 transitions. [2022-11-20 12:40:42,127 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1457 transitions. Word has length 45 [2022-11-20 12:40:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:42,127 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1457 transitions. [2022-11-20 12:40:42,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.333333333333333) internal successors, (114), 18 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:40:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1457 transitions. [2022-11-20 12:40:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:40:42,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:42,129 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:42,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:40:42,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-20 12:40:42,337 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:42,338 INFO L85 PathProgramCache]: Analyzing trace with hash -227620062, now seen corresponding path program 1 times [2022-11-20 12:40:42,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:42,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805483478] [2022-11-20 12:40:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:42,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:44,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:44,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805483478] [2022-11-20 12:40:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805483478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:44,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976870363] [2022-11-20 12:40:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:44,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:44,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:44,623 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:44,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:40:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:44,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 12:40:44,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:45,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:45,312 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 41 treesize of output 40 [2022-11-20 12:40:45,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:45,318 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 41 treesize of output 40 [2022-11-20 12:40:45,544 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 31 treesize of output 19 [2022-11-20 12:40:45,548 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 25 treesize of output 13 [2022-11-20 12:40:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:45,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:40:45,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976870363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:45,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:40:45,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [22] total 30 [2022-11-20 12:40:45,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423824147] [2022-11-20 12:40:45,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:45,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 12:40:45,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:45,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 12:40:45,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:40:45,633 INFO L87 Difference]: Start difference. First operand 1094 states and 1457 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:46,412 INFO L93 Difference]: Finished difference Result 1496 states and 1940 transitions. [2022-11-20 12:40:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:40:46,413 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 12:40:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:46,417 INFO L225 Difference]: With dead ends: 1496 [2022-11-20 12:40:46,417 INFO L226 Difference]: Without dead ends: 1496 [2022-11-20 12:40:46,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:40:46,419 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 415 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:46,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1010 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:40:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-11-20 12:40:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1277. [2022-11-20 12:40:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1130 states have (on average 1.331858407079646) internal successors, (1505), 1200 states have internal predecessors, (1505), 70 states have call successors, (70), 25 states have call predecessors, (70), 50 states have return successors, (140), 51 states have call predecessors, (140), 70 states have call successors, (140) [2022-11-20 12:40:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1715 transitions. [2022-11-20 12:40:46,455 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1715 transitions. Word has length 45 [2022-11-20 12:40:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:46,455 INFO L495 AbstractCegarLoop]: Abstraction has 1277 states and 1715 transitions. [2022-11-20 12:40:46,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1715 transitions. [2022-11-20 12:40:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:40:46,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:46,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:46,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 12:40:46,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-20 12:40:46,663 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash -170361760, now seen corresponding path program 1 times [2022-11-20 12:40:46,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:46,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436122693] [2022-11-20 12:40:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:46,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:47,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:47,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:47,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436122693] [2022-11-20 12:40:47,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436122693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:47,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:47,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 12:40:47,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656816795] [2022-11-20 12:40:47,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:47,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:40:47,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:47,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:40:47,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:40:47,169 INFO L87 Difference]: Start difference. First operand 1277 states and 1715 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:47,741 INFO L93 Difference]: Finished difference Result 1790 states and 2322 transitions. [2022-11-20 12:40:47,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:40:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 12:40:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:47,747 INFO L225 Difference]: With dead ends: 1790 [2022-11-20 12:40:47,747 INFO L226 Difference]: Without dead ends: 1790 [2022-11-20 12:40:47,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:40:47,748 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 887 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:47,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 1192 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:40:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2022-11-20 12:40:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1555. [2022-11-20 12:40:47,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1354 states have (on average 1.3330871491875924) internal successors, (1805), 1455 states have internal predecessors, (1805), 96 states have call successors, (96), 39 states have call predecessors, (96), 78 states have return successors, (192), 60 states have call predecessors, (192), 96 states have call successors, (192) [2022-11-20 12:40:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2093 transitions. [2022-11-20 12:40:47,790 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2093 transitions. Word has length 45 [2022-11-20 12:40:47,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:47,791 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2093 transitions. [2022-11-20 12:40:47,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2093 transitions. [2022-11-20 12:40:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:40:47,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:47,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:47,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-20 12:40:47,793 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1074946575, now seen corresponding path program 1 times [2022-11-20 12:40:47,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:47,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998702301] [2022-11-20 12:40:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:47,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:48,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:48,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:48,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998702301] [2022-11-20 12:40:48,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998702301] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:48,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:48,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 12:40:48,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221186037] [2022-11-20 12:40:48,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:48,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:40:48,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:40:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:40:48,459 INFO L87 Difference]: Start difference. First operand 1555 states and 2093 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:50,245 INFO L93 Difference]: Finished difference Result 1870 states and 2439 transitions. [2022-11-20 12:40:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:40:50,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 12:40:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:50,252 INFO L225 Difference]: With dead ends: 1870 [2022-11-20 12:40:50,252 INFO L226 Difference]: Without dead ends: 1870 [2022-11-20 12:40:50,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:40:50,264 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 786 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:50,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 1179 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:40:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-11-20 12:40:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1577. [2022-11-20 12:40:50,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1370 states have (on average 1.332846715328467) internal successors, (1826), 1474 states have internal predecessors, (1826), 96 states have call successors, (96), 42 states have call predecessors, (96), 84 states have return successors, (192), 60 states have call predecessors, (192), 96 states have call successors, (192) [2022-11-20 12:40:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 2114 transitions. [2022-11-20 12:40:50,329 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 2114 transitions. Word has length 45 [2022-11-20 12:40:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:50,330 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 2114 transitions. [2022-11-20 12:40:50,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 2114 transitions. [2022-11-20 12:40:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:40:50,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:50,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:50,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-20 12:40:50,333 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1074946574, now seen corresponding path program 1 times [2022-11-20 12:40:50,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:50,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014887428] [2022-11-20 12:40:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:50,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:51,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:51,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:51,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014887428] [2022-11-20 12:40:51,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014887428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:51,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:40:51,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 12:40:51,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721879517] [2022-11-20 12:40:51,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:51,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:40:51,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:51,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:40:51,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:40:51,320 INFO L87 Difference]: Start difference. First operand 1577 states and 2114 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:53,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:53,248 INFO L93 Difference]: Finished difference Result 1861 states and 2428 transitions. [2022-11-20 12:40:53,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:40:53,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 12:40:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:53,254 INFO L225 Difference]: With dead ends: 1861 [2022-11-20 12:40:53,255 INFO L226 Difference]: Without dead ends: 1861 [2022-11-20 12:40:53,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:40:53,256 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 766 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:53,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 1276 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:40:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-11-20 12:40:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1635. [2022-11-20 12:40:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1420 states have (on average 1.3352112676056338) internal successors, (1896), 1528 states have internal predecessors, (1896), 100 states have call successors, (100), 44 states have call predecessors, (100), 88 states have return successors, (200), 62 states have call predecessors, (200), 100 states have call successors, (200) [2022-11-20 12:40:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 2196 transitions. [2022-11-20 12:40:53,300 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 2196 transitions. Word has length 45 [2022-11-20 12:40:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:53,301 INFO L495 AbstractCegarLoop]: Abstraction has 1635 states and 2196 transitions. [2022-11-20 12:40:53,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 2196 transitions. [2022-11-20 12:40:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:40:53,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:53,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:53,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-11-20 12:40:53,303 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:53,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1073099533, now seen corresponding path program 1 times [2022-11-20 12:40:53,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:53,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199307574] [2022-11-20 12:40:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:53,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:54,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:54,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:54,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199307574] [2022-11-20 12:40:54,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199307574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500496173] [2022-11-20 12:40:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:54,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:54,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:54,484 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:54,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:40:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 12:40:54,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:54,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:40:55,294 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 15 treesize of output 11 [2022-11-20 12:40:55,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:40:55,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-20 12:40:55,576 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 21 treesize of output 9 [2022-11-20 12:40:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:55,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:40:55,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500496173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:40:55,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:40:55,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2022-11-20 12:40:55,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165848139] [2022-11-20 12:40:55,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:40:55,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:40:55,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:40:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:40:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:40:55,587 INFO L87 Difference]: Start difference. First operand 1635 states and 2196 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:57,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:40:57,228 INFO L93 Difference]: Finished difference Result 2058 states and 2728 transitions. [2022-11-20 12:40:57,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 12:40:57,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 12:40:57,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:40:57,235 INFO L225 Difference]: With dead ends: 2058 [2022-11-20 12:40:57,235 INFO L226 Difference]: Without dead ends: 2058 [2022-11-20 12:40:57,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=404, Invalid=1576, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 12:40:57,236 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 785 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:40:57,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1528 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:40:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2022-11-20 12:40:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1660. [2022-11-20 12:40:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1439 states have (on average 1.3342599027102153) internal successors, (1920), 1550 states have internal predecessors, (1920), 100 states have call successors, (100), 47 states have call predecessors, (100), 94 states have return successors, (200), 62 states have call predecessors, (200), 100 states have call successors, (200) [2022-11-20 12:40:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2220 transitions. [2022-11-20 12:40:57,282 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2220 transitions. Word has length 45 [2022-11-20 12:40:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:40:57,283 INFO L495 AbstractCegarLoop]: Abstraction has 1660 states and 2220 transitions. [2022-11-20 12:40:57,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:40:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2220 transitions. [2022-11-20 12:40:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:40:57,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:40:57,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:40:57,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 12:40:57,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:57,491 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:40:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:40:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1073099532, now seen corresponding path program 1 times [2022-11-20 12:40:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:40:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877373806] [2022-11-20 12:40:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:57,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:40:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:59,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:40:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:40:59,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:40:59,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877373806] [2022-11-20 12:40:59,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877373806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:40:59,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142397989] [2022-11-20 12:40:59,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:40:59,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:40:59,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:40:59,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:40:59,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:40:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:40:59,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-20 12:40:59,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:40:59,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:41:00,129 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 15 treesize of output 11 [2022-11-20 12:41:00,139 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 15 treesize of output 11 [2022-11-20 12:41:00,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:00,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-20 12:41:00,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:00,350 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 27 treesize of output 26 [2022-11-20 12:41:00,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:41:00,763 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2022-11-20 12:41:00,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:41:00,772 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2022-11-20 12:41:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:00,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:41:00,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142397989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:00,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:41:00,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [18] total 32 [2022-11-20 12:41:00,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350149944] [2022-11-20 12:41:00,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:00,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:41:00,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:00,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:41:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 12:41:00,868 INFO L87 Difference]: Start difference. First operand 1660 states and 2220 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:02,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:02,641 INFO L93 Difference]: Finished difference Result 2061 states and 2725 transitions. [2022-11-20 12:41:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:41:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 12:41:02,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:02,646 INFO L225 Difference]: With dead ends: 2061 [2022-11-20 12:41:02,647 INFO L226 Difference]: Without dead ends: 2061 [2022-11-20 12:41:02,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=318, Invalid=1844, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 12:41:02,648 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 949 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:02,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 1581 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 821 Invalid, 0 Unknown, 246 Unchecked, 0.8s Time] [2022-11-20 12:41:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-11-20 12:41:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1649. [2022-11-20 12:41:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1428 states have (on average 1.334033613445378) internal successors, (1905), 1539 states have internal predecessors, (1905), 100 states have call successors, (100), 47 states have call predecessors, (100), 94 states have return successors, (200), 62 states have call predecessors, (200), 100 states have call successors, (200) [2022-11-20 12:41:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2205 transitions. [2022-11-20 12:41:02,696 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2205 transitions. Word has length 45 [2022-11-20 12:41:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:02,697 INFO L495 AbstractCegarLoop]: Abstraction has 1649 states and 2205 transitions. [2022-11-20 12:41:02,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2205 transitions. [2022-11-20 12:41:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:41:02,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:02,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:02,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 12:41:02,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-20 12:41:02,905 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash -696511495, now seen corresponding path program 1 times [2022-11-20 12:41:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:02,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134660651] [2022-11-20 12:41:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:03,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:03,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:03,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134660651] [2022-11-20 12:41:03,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134660651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:03,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:41:03,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 12:41:03,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456055197] [2022-11-20 12:41:03,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 12:41:03,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 12:41:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:41:03,624 INFO L87 Difference]: Start difference. First operand 1649 states and 2205 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:04,374 INFO L93 Difference]: Finished difference Result 1735 states and 2300 transitions. [2022-11-20 12:41:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:41:04,374 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-11-20 12:41:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:04,379 INFO L225 Difference]: With dead ends: 1735 [2022-11-20 12:41:04,379 INFO L226 Difference]: Without dead ends: 1733 [2022-11-20 12:41:04,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:41:04,380 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 910 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:04,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1116 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:41:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-20 12:41:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1417. [2022-11-20 12:41:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1236 states have (on average 1.3268608414239482) internal successors, (1640), 1323 states have internal predecessors, (1640), 80 states have call successors, (80), 37 states have call predecessors, (80), 74 states have return successors, (160), 56 states have call predecessors, (160), 80 states have call successors, (160) [2022-11-20 12:41:04,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 1880 transitions. [2022-11-20 12:41:04,414 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 1880 transitions. Word has length 45 [2022-11-20 12:41:04,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:04,415 INFO L495 AbstractCegarLoop]: Abstraction has 1417 states and 1880 transitions. [2022-11-20 12:41:04,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:04,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 1880 transitions. [2022-11-20 12:41:04,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:41:04,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:04,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:04,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-20 12:41:04,417 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:04,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash 139090909, now seen corresponding path program 1 times [2022-11-20 12:41:04,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:04,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058778702] [2022-11-20 12:41:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:04,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:04,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-20 12:41:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:04,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:04,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058778702] [2022-11-20 12:41:04,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058778702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:41:04,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243686723] [2022-11-20 12:41:04,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:04,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:04,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:41:04,583 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:41:04,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:41:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:04,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 12:41:04,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:41:05,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:41:05,037 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 12:41:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:41:05,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:41:05,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243686723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:05,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:41:05,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-11-20 12:41:05,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419201429] [2022-11-20 12:41:05,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:05,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:41:05,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:41:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:41:05,265 INFO L87 Difference]: Start difference. First operand 1417 states and 1880 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:05,662 INFO L93 Difference]: Finished difference Result 1180 states and 1554 transitions. [2022-11-20 12:41:05,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:41:05,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-11-20 12:41:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:05,666 INFO L225 Difference]: With dead ends: 1180 [2022-11-20 12:41:05,666 INFO L226 Difference]: Without dead ends: 1180 [2022-11-20 12:41:05,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:41:05,667 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 92 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:05,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 623 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:41:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-11-20 12:41:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1154. [2022-11-20 12:41:05,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1005 states have (on average 1.3233830845771144) internal successors, (1330), 1077 states have internal predecessors, (1330), 64 states have call successors, (64), 29 states have call predecessors, (64), 58 states have return successors, (128), 47 states have call predecessors, (128), 64 states have call successors, (128) [2022-11-20 12:41:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1522 transitions. [2022-11-20 12:41:05,716 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1522 transitions. Word has length 46 [2022-11-20 12:41:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:05,717 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1522 transitions. [2022-11-20 12:41:05,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1522 transitions. [2022-11-20 12:41:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:41:05,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:05,718 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:05,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 12:41:05,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-20 12:41:05,925 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:05,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1036393234, now seen corresponding path program 1 times [2022-11-20 12:41:05,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:05,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312295062] [2022-11-20 12:41:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:05,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:06,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:06,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:06,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312295062] [2022-11-20 12:41:06,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312295062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:06,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:41:06,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 12:41:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970807789] [2022-11-20 12:41:06,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:06,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:41:06,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:41:06,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:41:06,563 INFO L87 Difference]: Start difference. First operand 1154 states and 1522 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:07,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:07,647 INFO L93 Difference]: Finished difference Result 1330 states and 1717 transitions. [2022-11-20 12:41:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:41:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-11-20 12:41:07,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:07,652 INFO L225 Difference]: With dead ends: 1330 [2022-11-20 12:41:07,652 INFO L226 Difference]: Without dead ends: 1330 [2022-11-20 12:41:07,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2022-11-20 12:41:07,653 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 758 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:07,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 882 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:41:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-11-20 12:41:07,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1154. [2022-11-20 12:41:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1005 states have (on average 1.3233830845771144) internal successors, (1330), 1077 states have internal predecessors, (1330), 64 states have call successors, (64), 29 states have call predecessors, (64), 58 states have return successors, (128), 47 states have call predecessors, (128), 64 states have call successors, (128) [2022-11-20 12:41:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1522 transitions. [2022-11-20 12:41:07,681 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1522 transitions. Word has length 46 [2022-11-20 12:41:07,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:07,681 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1522 transitions. [2022-11-20 12:41:07,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1522 transitions. [2022-11-20 12:41:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 12:41:07,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:07,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-11-20 12:41:07,683 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1093651536, now seen corresponding path program 1 times [2022-11-20 12:41:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:07,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094756114] [2022-11-20 12:41:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:07,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:08,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:08,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:08,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094756114] [2022-11-20 12:41:08,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094756114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:08,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:41:08,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 12:41:08,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723706161] [2022-11-20 12:41:08,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:08,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:41:08,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:08,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:41:08,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:41:08,337 INFO L87 Difference]: Start difference. First operand 1154 states and 1522 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:09,734 INFO L93 Difference]: Finished difference Result 1677 states and 2163 transitions. [2022-11-20 12:41:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 12:41:09,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-11-20 12:41:09,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:09,739 INFO L225 Difference]: With dead ends: 1677 [2022-11-20 12:41:09,739 INFO L226 Difference]: Without dead ends: 1677 [2022-11-20 12:41:09,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=957, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:41:09,741 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 800 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:09,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 1746 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:41:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-11-20 12:41:09,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1071. [2022-11-20 12:41:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1071 states, 932 states have (on average 1.3197424892703862) internal successors, (1230), 999 states have internal predecessors, (1230), 58 states have call successors, (58), 27 states have call predecessors, (58), 54 states have return successors, (116), 44 states have call predecessors, (116), 58 states have call successors, (116) [2022-11-20 12:41:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1404 transitions. [2022-11-20 12:41:09,773 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1404 transitions. Word has length 46 [2022-11-20 12:41:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:09,774 INFO L495 AbstractCegarLoop]: Abstraction has 1071 states and 1404 transitions. [2022-11-20 12:41:09,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1404 transitions. [2022-11-20 12:41:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 12:41:09,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:09,775 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:09,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-11-20 12:41:09,776 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 301908134, now seen corresponding path program 1 times [2022-11-20 12:41:09,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:09,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426384192] [2022-11-20 12:41:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:11,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426384192] [2022-11-20 12:41:11,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426384192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:41:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756512698] [2022-11-20 12:41:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:11,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:41:11,874 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:41:11,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:41:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:12,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 12:41:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:41:12,600 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 15 treesize of output 11 [2022-11-20 12:41:12,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:12,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-20 12:41:12,883 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 21 treesize of output 9 [2022-11-20 12:41:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:12,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:41:12,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756512698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:12,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:41:12,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [18] total 29 [2022-11-20 12:41:12,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297387430] [2022-11-20 12:41:12,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:12,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 12:41:12,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:12,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 12:41:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:41:12,899 INFO L87 Difference]: Start difference. First operand 1071 states and 1404 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:14,265 INFO L93 Difference]: Finished difference Result 1479 states and 1916 transitions. [2022-11-20 12:41:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:41:14,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-11-20 12:41:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:14,270 INFO L225 Difference]: With dead ends: 1479 [2022-11-20 12:41:14,270 INFO L226 Difference]: Without dead ends: 1479 [2022-11-20 12:41:14,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=376, Invalid=1976, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 12:41:14,271 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1159 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:14,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 983 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:41:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2022-11-20 12:41:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1084. [2022-11-20 12:41:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 945 states have (on average 1.3185185185185184) internal successors, (1246), 1012 states have internal predecessors, (1246), 58 states have call successors, (58), 27 states have call predecessors, (58), 54 states have return successors, (116), 44 states have call predecessors, (116), 58 states have call successors, (116) [2022-11-20 12:41:14,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1420 transitions. [2022-11-20 12:41:14,303 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1420 transitions. Word has length 47 [2022-11-20 12:41:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:14,303 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 1420 transitions. [2022-11-20 12:41:14,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1420 transitions. [2022-11-20 12:41:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 12:41:14,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:14,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:14,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 12:41:14,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-20 12:41:14,512 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:14,512 INFO L85 PathProgramCache]: Analyzing trace with hash -507438492, now seen corresponding path program 1 times [2022-11-20 12:41:14,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:14,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391354129] [2022-11-20 12:41:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:14,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:15,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:15,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:15,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:15,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391354129] [2022-11-20 12:41:15,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391354129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:41:15,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45485545] [2022-11-20 12:41:15,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:15,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:15,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:41:15,756 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:41:15,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:41:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:15,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 12:41:15,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:41:16,553 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 15 treesize of output 11 [2022-11-20 12:41:16,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:41:16,842 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2022-11-20 12:41:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:16,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:41:16,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45485545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:16,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:41:16,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [19] total 29 [2022-11-20 12:41:16,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141993121] [2022-11-20 12:41:16,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:16,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 12:41:16,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:16,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 12:41:16,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:41:16,892 INFO L87 Difference]: Start difference. First operand 1084 states and 1420 transitions. Second operand has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:17,314 INFO L93 Difference]: Finished difference Result 1145 states and 1469 transitions. [2022-11-20 12:41:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 12:41:17,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-11-20 12:41:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:17,318 INFO L225 Difference]: With dead ends: 1145 [2022-11-20 12:41:17,318 INFO L226 Difference]: Without dead ends: 1145 [2022-11-20 12:41:17,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:41:17,319 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 493 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:17,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 841 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 229 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-11-20 12:41:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-11-20 12:41:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1084. [2022-11-20 12:41:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 945 states have (on average 1.3185185185185184) internal successors, (1246), 1012 states have internal predecessors, (1246), 58 states have call successors, (58), 27 states have call predecessors, (58), 54 states have return successors, (116), 44 states have call predecessors, (116), 58 states have call successors, (116) [2022-11-20 12:41:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1420 transitions. [2022-11-20 12:41:17,343 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1420 transitions. Word has length 47 [2022-11-20 12:41:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:17,344 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 1420 transitions. [2022-11-20 12:41:17,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1420 transitions. [2022-11-20 12:41:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 12:41:17,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:17,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:17,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:41:17,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:17,552 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2060267401, now seen corresponding path program 1 times [2022-11-20 12:41:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:17,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587656729] [2022-11-20 12:41:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:17,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:17,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:41:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 12:41:17,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:17,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587656729] [2022-11-20 12:41:17,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587656729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:17,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:41:17,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:41:17,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825343716] [2022-11-20 12:41:17,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:41:17,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:17,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:41:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:41:17,690 INFO L87 Difference]: Start difference. First operand 1084 states and 1420 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:41:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:17,738 INFO L93 Difference]: Finished difference Result 1300 states and 1692 transitions. [2022-11-20 12:41:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:41:17,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-11-20 12:41:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:17,744 INFO L225 Difference]: With dead ends: 1300 [2022-11-20 12:41:17,744 INFO L226 Difference]: Without dead ends: 1300 [2022-11-20 12:41:17,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:41:17,745 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 309 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:17,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 242 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:41:17,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-11-20 12:41:17,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1083. [2022-11-20 12:41:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 945 states have (on average 1.307936507936508) internal successors, (1236), 1011 states have internal predecessors, (1236), 58 states have call successors, (58), 27 states have call predecessors, (58), 54 states have return successors, (116), 44 states have call predecessors, (116), 58 states have call successors, (116) [2022-11-20 12:41:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1410 transitions. [2022-11-20 12:41:17,770 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1410 transitions. Word has length 48 [2022-11-20 12:41:17,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:17,770 INFO L495 AbstractCegarLoop]: Abstraction has 1083 states and 1410 transitions. [2022-11-20 12:41:17,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 12:41:17,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1410 transitions. [2022-11-20 12:41:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 12:41:17,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:17,772 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:17,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-11-20 12:41:17,772 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash -556219847, now seen corresponding path program 1 times [2022-11-20 12:41:17,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:17,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735983816] [2022-11-20 12:41:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:19,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:19,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:41:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:41:19,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735983816] [2022-11-20 12:41:19,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735983816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:19,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:41:19,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-20 12:41:19,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117976046] [2022-11-20 12:41:19,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:19,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 12:41:19,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 12:41:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-11-20 12:41:19,400 INFO L87 Difference]: Start difference. First operand 1083 states and 1410 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:41:23,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:23,849 INFO L93 Difference]: Finished difference Result 2296 states and 2990 transitions. [2022-11-20 12:41:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 12:41:23,850 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-11-20 12:41:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:23,855 INFO L225 Difference]: With dead ends: 2296 [2022-11-20 12:41:23,856 INFO L226 Difference]: Without dead ends: 2295 [2022-11-20 12:41:23,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=579, Invalid=1871, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 12:41:23,857 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 1604 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1604 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:23,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1604 Valid, 1947 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 12:41:23,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2022-11-20 12:41:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1133. [2022-11-20 12:41:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 987 states have (on average 1.3059777102330294) internal successors, (1289), 1057 states have internal predecessors, (1289), 62 states have call successors, (62), 29 states have call predecessors, (62), 58 states have return successors, (124), 46 states have call predecessors, (124), 62 states have call successors, (124) [2022-11-20 12:41:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1475 transitions. [2022-11-20 12:41:23,894 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1475 transitions. Word has length 49 [2022-11-20 12:41:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:23,894 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1475 transitions. [2022-11-20 12:41:23,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:41:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1475 transitions. [2022-11-20 12:41:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 12:41:23,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:23,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:23,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-20 12:41:23,896 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:23,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:23,897 INFO L85 PathProgramCache]: Analyzing trace with hash -457059178, now seen corresponding path program 1 times [2022-11-20 12:41:23,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:23,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556535320] [2022-11-20 12:41:23,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:23,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:24,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:24,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:24,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556535320] [2022-11-20 12:41:24,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556535320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:24,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:41:24,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-20 12:41:24,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740562654] [2022-11-20 12:41:24,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:24,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 12:41:24,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:24,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 12:41:24,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-20 12:41:24,536 INFO L87 Difference]: Start difference. First operand 1133 states and 1475 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:25,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:25,934 INFO L93 Difference]: Finished difference Result 1306 states and 1666 transitions. [2022-11-20 12:41:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 12:41:25,935 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-11-20 12:41:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:25,938 INFO L225 Difference]: With dead ends: 1306 [2022-11-20 12:41:25,938 INFO L226 Difference]: Without dead ends: 1306 [2022-11-20 12:41:25,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:41:25,939 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 673 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:25,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 875 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 12:41:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-11-20 12:41:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1133. [2022-11-20 12:41:25,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 987 states have (on average 1.3059777102330294) internal successors, (1289), 1057 states have internal predecessors, (1289), 62 states have call successors, (62), 29 states have call predecessors, (62), 58 states have return successors, (124), 46 states have call predecessors, (124), 62 states have call successors, (124) [2022-11-20 12:41:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1475 transitions. [2022-11-20 12:41:25,972 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1475 transitions. Word has length 48 [2022-11-20 12:41:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:25,972 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1475 transitions. [2022-11-20 12:41:25,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1475 transitions. [2022-11-20 12:41:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 12:41:25,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:25,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:25,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-11-20 12:41:25,974 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:25,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1266405804, now seen corresponding path program 1 times [2022-11-20 12:41:25,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:25,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821329014] [2022-11-20 12:41:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:27,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:27,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:27,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821329014] [2022-11-20 12:41:27,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821329014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:41:27,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:41:27,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 12:41:27,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898052339] [2022-11-20 12:41:27,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:41:27,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 12:41:27,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:27,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 12:41:27,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:41:27,042 INFO L87 Difference]: Start difference. First operand 1133 states and 1475 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:29,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:29,152 INFO L93 Difference]: Finished difference Result 1532 states and 1975 transitions. [2022-11-20 12:41:29,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:41:29,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-11-20 12:41:29,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:29,157 INFO L225 Difference]: With dead ends: 1532 [2022-11-20 12:41:29,158 INFO L226 Difference]: Without dead ends: 1532 [2022-11-20 12:41:29,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:41:29,159 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1192 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:29,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 1571 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:41:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2022-11-20 12:41:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1121. [2022-11-20 12:41:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 975 states have (on average 1.3066666666666666) internal successors, (1274), 1045 states have internal predecessors, (1274), 62 states have call successors, (62), 29 states have call predecessors, (62), 58 states have return successors, (124), 46 states have call predecessors, (124), 62 states have call successors, (124) [2022-11-20 12:41:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1460 transitions. [2022-11-20 12:41:29,188 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1460 transitions. Word has length 48 [2022-11-20 12:41:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:29,189 INFO L495 AbstractCegarLoop]: Abstraction has 1121 states and 1460 transitions. [2022-11-20 12:41:29,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 12:41:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1460 transitions. [2022-11-20 12:41:29,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 12:41:29,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:29,191 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:29,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-11-20 12:41:29,191 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash 220633641, now seen corresponding path program 1 times [2022-11-20 12:41:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:29,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435334190] [2022-11-20 12:41:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:31,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:31,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-20 12:41:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:41:31,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:31,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435334190] [2022-11-20 12:41:31,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435334190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:41:31,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981918458] [2022-11-20 12:41:31,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:31,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:31,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:41:31,486 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:41:31,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:41:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:31,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 12:41:31,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:41:32,285 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 15 treesize of output 11 [2022-11-20 12:41:32,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:32,377 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 30 treesize of output 23 [2022-11-20 12:41:32,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:32,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:32,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:41:32,798 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 3 case distinctions, treesize of input 56 treesize of output 52 [2022-11-20 12:41:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:33,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:41:33,640 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 88 treesize of output 82 [2022-11-20 12:41:33,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:33,674 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 88 treesize of output 82 [2022-11-20 12:41:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:41:34,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981918458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:41:34,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:41:34,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 18] total 52 [2022-11-20 12:41:34,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528894426] [2022-11-20 12:41:34,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:41:34,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 12:41:34,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:41:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 12:41:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2477, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 12:41:34,643 INFO L87 Difference]: Start difference. First operand 1121 states and 1460 transitions. Second operand has 52 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 49 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 12:41:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:41:49,855 INFO L93 Difference]: Finished difference Result 3289 states and 4307 transitions. [2022-11-20 12:41:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 12:41:49,856 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 49 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-11-20 12:41:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:41:49,868 INFO L225 Difference]: With dead ends: 3289 [2022-11-20 12:41:49,868 INFO L226 Difference]: Without dead ends: 3287 [2022-11-20 12:41:49,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3219 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=2398, Invalid=10942, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 12:41:49,870 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 5227 mSDsluCounter, 6219 mSDsCounter, 0 mSdLazyCounter, 4820 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5227 SdHoareTripleChecker+Valid, 6534 SdHoareTripleChecker+Invalid, 5213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 4820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:41:49,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5227 Valid, 6534 Invalid, 5213 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [393 Valid, 4820 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-20 12:41:49,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3287 states. [2022-11-20 12:41:49,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3287 to 1065. [2022-11-20 12:41:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 927 states have (on average 1.2998921251348436) internal successors, (1205), 993 states have internal predecessors, (1205), 58 states have call successors, (58), 27 states have call predecessors, (58), 54 states have return successors, (116), 44 states have call predecessors, (116), 58 states have call successors, (116) [2022-11-20 12:41:49,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1379 transitions. [2022-11-20 12:41:49,918 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1379 transitions. Word has length 50 [2022-11-20 12:41:49,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:41:49,919 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 1379 transitions. [2022-11-20 12:41:49,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3846153846153846) internal successors, (124), 49 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 12:41:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1379 transitions. [2022-11-20 12:41:49,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 12:41:49,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:41:49,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:41:49,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:41:50,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:50,127 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-20 12:41:50,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:41:50,127 INFO L85 PathProgramCache]: Analyzing trace with hash 483964998, now seen corresponding path program 1 times [2022-11-20 12:41:50,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:41:50,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882950579] [2022-11-20 12:41:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:41:50,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-20 12:41:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:54,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:41:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882950579] [2022-11-20 12:41:54,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882950579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:41:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392456931] [2022-11-20 12:41:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:41:54,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:41:54,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:41:54,116 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:41:54,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04498025-2747-41c0-8577-0f7491df0b89/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:41:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:41:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-20 12:41:54,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:41:54,669 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 12:41:54,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 12:41:54,947 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 15 treesize of output 11 [2022-11-20 12:41:54,956 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 15 treesize of output 11 [2022-11-20 12:41:55,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:55,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 12:41:55,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:55,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-20 12:41:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:55,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:55,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 12:41:55,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:55,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:41:56,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:56,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-20 12:41:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:56,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-11-20 12:41:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:56,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:41:56,357 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 12:41:56,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 60 [2022-11-20 12:41:56,369 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 41 treesize of output 33 [2022-11-20 12:41:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:57,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:41:57,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 32 [2022-11-20 12:41:57,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:41:57,219 INFO L321 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2022-11-20 12:41:57,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 22 [2022-11-20 12:41:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:41:57,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:41:57,951 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse1 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|))) (and (forall ((v_ArrVal_1527 (Array Int Int)) (v_ArrVal_1525 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1527) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1525)) |c_~#list~0.base|) .cse2)) 4) 0)) (forall ((v_ArrVal_1525 Int)) (= (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1525)))) (select .cse3 (select (select .cse3 |c_~#list~0.base|) .cse2))) 4) 0)))) is different from false [2022-11-20 12:42:12,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:42:12,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 19298625 treesize of output 19133975