./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0217.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0217.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc --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 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec --- 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-5e519f3 [2022-11-02 20:55:57,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:55:57,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:55:57,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:55:57,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:55:57,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:55:57,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:55:57,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:55:57,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:55:57,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:55:57,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:55:57,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:55:57,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:55:57,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:55:57,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:55:57,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:55:57,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:55:57,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:55:57,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:55:57,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:55:57,191 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:55:57,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:55:57,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:55:57,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:55:57,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:55:57,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:55:57,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:55:57,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:55:57,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:55:57,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:55:57,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:55:57,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:55:57,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:55:57,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:55:57,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:55:57,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:55:57,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:55:57,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:55:57,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:55:57,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:55:57,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:55:57,210 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:55:57,232 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:55:57,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:55:57,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:55:57,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:55:57,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:55:57,234 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:55:57,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:55:57,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:55:57,235 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:55:57,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:55:57,235 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:55:57,236 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:55:57,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:55:57,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:55:57,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:55:57,236 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:55:57,237 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:55:57,237 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:55:57,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:55:57,237 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:55:57,238 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:55:57,238 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:55:57,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:55:57,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:55:57,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:55:57,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:57,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:55:57,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:55:57,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:55:57,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:55:57,240 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_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 163bc3b45d6f21a8e478003f84571178259b289b3d9717ecadbc4595fc507bec [2022-11-02 20:55:57,551 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:55:57,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:55:57,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:55:57,586 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:55:57,587 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:55:57,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/memsafety/test-0217.i [2022-11-02 20:55:57,656 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/data/46b8d9510/6a5da9be997d4ec6b6d0d813715a2a8c/FLAGb436efdae [2022-11-02 20:55:58,317 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:55:58,318 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/sv-benchmarks/c/memsafety/test-0217.i [2022-11-02 20:55:58,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/data/46b8d9510/6a5da9be997d4ec6b6d0d813715a2a8c/FLAGb436efdae [2022-11-02 20:55:58,566 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/data/46b8d9510/6a5da9be997d4ec6b6d0d813715a2a8c [2022-11-02 20:55:58,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:55:58,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:55:58,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:58,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:55:58,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:55:58,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:58" (1/1) ... [2022-11-02 20:55:58,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798b59b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:58, skipping insertion in model container [2022-11-02 20:55:58,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:58" (1/1) ... [2022-11-02 20:55:58,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:55:58,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:55:59,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:59,117 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:55:59,183 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:59,216 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:55:59,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59 WrapperNode [2022-11-02 20:55:59,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:59,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:59,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:55:59,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:55:59,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,272 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 218 [2022-11-02 20:55:59,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:59,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:55:59,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:55:59,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:55:59,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,305 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:55:59,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:55:59,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:55:59,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:55:59,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (1/1) ... [2022-11-02 20:55:59,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:59,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:55:59,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:55:59,404 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-02 20:55:59,405 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-02 20:55:59,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:55:59,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:55:59,407 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:55:59,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:55:59,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:55:59,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:55:59,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:55:59,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:55:59,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:55:59,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:55:59,583 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:55:59,585 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:56:00,208 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:56:00,217 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:56:00,222 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-02 20:56:00,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:56:00 BoogieIcfgContainer [2022-11-02 20:56:00,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:56:00,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:56:00,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:56:00,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:56:00,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:55:58" (1/3) ... [2022-11-02 20:56:00,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dea1ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:56:00, skipping insertion in model container [2022-11-02 20:56:00,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:59" (2/3) ... [2022-11-02 20:56:00,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dea1ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:56:00, skipping insertion in model container [2022-11-02 20:56:00,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:56:00" (3/3) ... [2022-11-02 20:56:00,241 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217.i [2022-11-02 20:56:00,263 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:56:00,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-11-02 20:56:00,336 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:56:00,343 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;@71989050, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:56:00,343 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-11-02 20:56:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 100 states have (on average 1.94) internal successors, (194), 167 states have internal predecessors, (194), 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) [2022-11-02 20:56:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-02 20:56:00,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:00,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-02 20:56:00,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1074949738, now seen corresponding path program 1 times [2022-11-02 20:56:00,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:00,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334439503] [2022-11-02 20:56:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:00,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:00,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334439503] [2022-11-02 20:56:00,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334439503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:00,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:00,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:56:00,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714317931] [2022-11-02 20:56:00,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:00,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:56:00,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:00,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:56:00,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:56:00,609 INFO L87 Difference]: Start difference. First operand has 171 states, 100 states have (on average 1.94) internal successors, (194), 167 states have internal predecessors, (194), 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) [2022-11-02 20:56:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:00,638 INFO L93 Difference]: Finished difference Result 171 states and 192 transitions. [2022-11-02 20:56:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:56:00,641 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 [2022-11-02 20:56:00,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:00,650 INFO L225 Difference]: With dead ends: 171 [2022-11-02 20:56:00,650 INFO L226 Difference]: Without dead ends: 169 [2022-11-02 20:56:00,652 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 [2022-11-02 20:56:00,656 INFO L413 NwaCegarLoop]: 192 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, 192 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 [2022-11-02 20:56:00,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-02 20:56:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-02 20:56:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 99 states have (on average 1.878787878787879) internal successors, (186), 165 states have internal predecessors, (186), 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) [2022-11-02 20:56:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2022-11-02 20:56:00,708 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 6 [2022-11-02 20:56:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:00,709 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2022-11-02 20:56:00,709 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) [2022-11-02 20:56:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2022-11-02 20:56:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:56:00,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:00,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:00,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:56:00,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1280317330, now seen corresponding path program 1 times [2022-11-02 20:56:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:00,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221333668] [2022-11-02 20:56:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:00,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:00,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:00,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221333668] [2022-11-02 20:56:00,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221333668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:00,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:00,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-02 20:56:00,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574705110] [2022-11-02 20:56:00,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:00,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:56:00,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:00,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:56:00,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:56:00,910 INFO L87 Difference]: Start difference. First operand 169 states and 190 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) [2022-11-02 20:56:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:01,218 INFO L93 Difference]: Finished difference Result 329 states and 370 transitions. [2022-11-02 20:56:01,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:56:01,219 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 [2022-11-02 20:56:01,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:01,227 INFO L225 Difference]: With dead ends: 329 [2022-11-02 20:56:01,228 INFO L226 Difference]: Without dead ends: 329 [2022-11-02 20:56:01,232 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 [2022-11-02 20:56:01,234 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 171 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:01,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 249 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-02 20:56:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 233. [2022-11-02 20:56:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 160 states have (on average 1.8625) internal successors, (298), 226 states have internal predecessors, (298), 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) [2022-11-02 20:56:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 306 transitions. [2022-11-02 20:56:01,273 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 306 transitions. Word has length 7 [2022-11-02 20:56:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:01,274 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 306 transitions. [2022-11-02 20:56:01,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:56:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 306 transitions. [2022-11-02 20:56:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:56:01,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:01,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:01,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:56:01,279 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:01,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1280317329, now seen corresponding path program 1 times [2022-11-02 20:56:01,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:01,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427123942] [2022-11-02 20:56:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:01,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:01,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:01,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427123942] [2022-11-02 20:56:01,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427123942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:01,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:01,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:56:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069099369] [2022-11-02 20:56:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:01,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:01,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:01,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:01,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:01,516 INFO L87 Difference]: Start difference. First operand 233 states and 306 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) [2022-11-02 20:56:01,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:01,749 INFO L93 Difference]: Finished difference Result 376 states and 474 transitions. [2022-11-02 20:56:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:01,750 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 [2022-11-02 20:56:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:01,752 INFO L225 Difference]: With dead ends: 376 [2022-11-02 20:56:01,752 INFO L226 Difference]: Without dead ends: 376 [2022-11-02 20:56:01,752 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 [2022-11-02 20:56:01,753 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 141 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:01,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 422 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:01,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-02 20:56:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 310. [2022-11-02 20:56:01,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 231 states have (on average 1.8225108225108224) internal successors, (421), 299 states have internal predecessors, (421), 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) [2022-11-02 20:56:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2022-11-02 20:56:01,788 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 7 [2022-11-02 20:56:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:01,789 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2022-11-02 20:56:01,789 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) [2022-11-02 20:56:01,789 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2022-11-02 20:56:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:56:01,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:01,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:01,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:56:01,792 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:01,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:01,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1280317267, now seen corresponding path program 1 times [2022-11-02 20:56:01,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:01,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400883679] [2022-11-02 20:56:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:01,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:01,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:01,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400883679] [2022-11-02 20:56:01,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400883679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:01,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:01,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:56:01,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838125594] [2022-11-02 20:56:01,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:01,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:01,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:01,976 INFO L87 Difference]: Start difference. First operand 310 states and 437 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) [2022-11-02 20:56:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:02,198 INFO L93 Difference]: Finished difference Result 375 states and 472 transitions. [2022-11-02 20:56:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:02,198 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 [2022-11-02 20:56:02,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:02,200 INFO L225 Difference]: With dead ends: 375 [2022-11-02 20:56:02,200 INFO L226 Difference]: Without dead ends: 375 [2022-11-02 20:56:02,201 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 [2022-11-02 20:56:02,210 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 123 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:02,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 436 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:02,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-02 20:56:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 310. [2022-11-02 20:56:02,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 231 states have (on average 1.8225108225108224) internal successors, (421), 299 states have internal predecessors, (421), 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) [2022-11-02 20:56:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 437 transitions. [2022-11-02 20:56:02,236 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 437 transitions. Word has length 7 [2022-11-02 20:56:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:02,236 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 437 transitions. [2022-11-02 20:56:02,236 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) [2022-11-02 20:56:02,237 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 437 transitions. [2022-11-02 20:56:02,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:56:02,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:02,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:02,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:56:02,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:02,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1671227278, now seen corresponding path program 1 times [2022-11-02 20:56:02,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566345142] [2022-11-02 20:56:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:02,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:02,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:02,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566345142] [2022-11-02 20:56:02,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566345142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:02,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:02,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:02,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633859992] [2022-11-02 20:56:02,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:02,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:02,498 INFO L87 Difference]: Start difference. First operand 310 states and 437 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) [2022-11-02 20:56:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:02,821 INFO L93 Difference]: Finished difference Result 461 states and 621 transitions. [2022-11-02 20:56:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:56:02,822 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 [2022-11-02 20:56:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:02,826 INFO L225 Difference]: With dead ends: 461 [2022-11-02 20:56:02,826 INFO L226 Difference]: Without dead ends: 461 [2022-11-02 20:56:02,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:56:02,828 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 150 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:02,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 803 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-02 20:56:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 352. [2022-11-02 20:56:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 270 states have (on average 1.8074074074074074) internal successors, (488), 339 states have internal predecessors, (488), 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) [2022-11-02 20:56:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 508 transitions. [2022-11-02 20:56:02,851 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 508 transitions. Word has length 10 [2022-11-02 20:56:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:02,855 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 508 transitions. [2022-11-02 20:56:02,855 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) [2022-11-02 20:56:02,855 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 508 transitions. [2022-11-02 20:56:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:56:02,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:02,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:02,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:56:02,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:02,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:02,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1673074320, now seen corresponding path program 1 times [2022-11-02 20:56:02,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:02,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677284484] [2022-11-02 20:56:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:02,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:03,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:03,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677284484] [2022-11-02 20:56:03,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677284484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:03,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:03,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:03,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227758175] [2022-11-02 20:56:03,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:03,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:03,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:03,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:03,069 INFO L87 Difference]: Start difference. First operand 352 states and 508 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) [2022-11-02 20:56:03,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:03,286 INFO L93 Difference]: Finished difference Result 451 states and 610 transitions. [2022-11-02 20:56:03,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:56:03,287 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 [2022-11-02 20:56:03,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:03,289 INFO L225 Difference]: With dead ends: 451 [2022-11-02 20:56:03,289 INFO L226 Difference]: Without dead ends: 451 [2022-11-02 20:56:03,289 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 [2022-11-02 20:56:03,290 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 131 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:03,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 762 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-02 20:56:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 351. [2022-11-02 20:56:03,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 269 states have (on average 1.8104089219330854) internal successors, (487), 338 states have internal predecessors, (487), 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) [2022-11-02 20:56:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 507 transitions. [2022-11-02 20:56:03,301 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 507 transitions. Word has length 10 [2022-11-02 20:56:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:03,301 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 507 transitions. [2022-11-02 20:56:03,301 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) [2022-11-02 20:56:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 507 transitions. [2022-11-02 20:56:03,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:56:03,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:03,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:03,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:56:03,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:03,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:03,303 INFO L85 PathProgramCache]: Analyzing trace with hash 268436822, now seen corresponding path program 1 times [2022-11-02 20:56:03,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:03,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028873709] [2022-11-02 20:56:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:03,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:03,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:03,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028873709] [2022-11-02 20:56:03,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028873709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:03,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:03,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:56:03,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332474327] [2022-11-02 20:56:03,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:03,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:56:03,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:03,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:56:03,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:56:03,324 INFO L87 Difference]: Start difference. First operand 351 states and 507 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) [2022-11-02 20:56:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:03,434 INFO L93 Difference]: Finished difference Result 406 states and 560 transitions. [2022-11-02 20:56:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:56:03,434 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 [2022-11-02 20:56:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:03,436 INFO L225 Difference]: With dead ends: 406 [2022-11-02 20:56:03,436 INFO L226 Difference]: Without dead ends: 399 [2022-11-02 20:56:03,437 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 [2022-11-02 20:56:03,437 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 70 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:03,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 287 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:56:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-02 20:56:03,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 348. [2022-11-02 20:56:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 266 states have (on average 1.8120300751879699) internal successors, (482), 335 states have internal predecessors, (482), 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) [2022-11-02 20:56:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 502 transitions. [2022-11-02 20:56:03,448 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 502 transitions. Word has length 11 [2022-11-02 20:56:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:03,448 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 502 transitions. [2022-11-02 20:56:03,448 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) [2022-11-02 20:56:03,449 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 502 transitions. [2022-11-02 20:56:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:56:03,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:03,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:03,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:56:03,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:03,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1044692257, now seen corresponding path program 1 times [2022-11-02 20:56:03,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:03,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32084571] [2022-11-02 20:56:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:03,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:03,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:03,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:03,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32084571] [2022-11-02 20:56:03,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32084571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:03,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:03,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:03,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936830225] [2022-11-02 20:56:03,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:03,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:03,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:03,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:03,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:03,519 INFO L87 Difference]: Start difference. First operand 348 states and 502 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) [2022-11-02 20:56:03,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:03,848 INFO L93 Difference]: Finished difference Result 570 states and 734 transitions. [2022-11-02 20:56:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:03,849 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 [2022-11-02 20:56:03,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:03,851 INFO L225 Difference]: With dead ends: 570 [2022-11-02 20:56:03,852 INFO L226 Difference]: Without dead ends: 570 [2022-11-02 20:56:03,852 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 [2022-11-02 20:56:03,852 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 329 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:03,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 434 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:03,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-11-02 20:56:03,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 354. [2022-11-02 20:56:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 272 states have (on average 1.7941176470588236) internal successors, (488), 341 states have internal predecessors, (488), 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) [2022-11-02 20:56:03,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 508 transitions. [2022-11-02 20:56:03,866 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 508 transitions. Word has length 15 [2022-11-02 20:56:03,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:03,866 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 508 transitions. [2022-11-02 20:56:03,867 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) [2022-11-02 20:56:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 508 transitions. [2022-11-02 20:56:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:56:03,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:03,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:03,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:56:03,868 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1044692256, now seen corresponding path program 1 times [2022-11-02 20:56:03,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:03,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104355794] [2022-11-02 20:56:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:03,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:03,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:03,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104355794] [2022-11-02 20:56:03,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104355794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:03,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:03,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:03,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489135670] [2022-11-02 20:56:03,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:03,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:03,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:03,997 INFO L87 Difference]: Start difference. First operand 354 states and 508 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) [2022-11-02 20:56:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:04,231 INFO L93 Difference]: Finished difference Result 408 states and 530 transitions. [2022-11-02 20:56:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:04,231 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 [2022-11-02 20:56:04,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:04,233 INFO L225 Difference]: With dead ends: 408 [2022-11-02 20:56:04,234 INFO L226 Difference]: Without dead ends: 408 [2022-11-02 20:56:04,234 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 [2022-11-02 20:56:04,235 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 197 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:04,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 445 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-02 20:56:04,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 354. [2022-11-02 20:56:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 272 states have (on average 1.7610294117647058) internal successors, (479), 341 states have internal predecessors, (479), 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) [2022-11-02 20:56:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 499 transitions. [2022-11-02 20:56:04,246 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 499 transitions. Word has length 15 [2022-11-02 20:56:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:04,246 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 499 transitions. [2022-11-02 20:56:04,246 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) [2022-11-02 20:56:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 499 transitions. [2022-11-02 20:56:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:56:04,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:04,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:04,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:56:04,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash 742849514, now seen corresponding path program 1 times [2022-11-02 20:56:04,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:04,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600650491] [2022-11-02 20:56:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:04,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:04,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:04,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:04,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600650491] [2022-11-02 20:56:04,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600650491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:04,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:04,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:04,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212654432] [2022-11-02 20:56:04,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:04,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:56:04,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:04,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:56:04,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:04,359 INFO L87 Difference]: Start difference. First operand 354 states and 499 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-11-02 20:56:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:04,831 INFO L93 Difference]: Finished difference Result 707 states and 854 transitions. [2022-11-02 20:56:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:56:04,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 17 [2022-11-02 20:56:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:04,834 INFO L225 Difference]: With dead ends: 707 [2022-11-02 20:56:04,834 INFO L226 Difference]: Without dead ends: 707 [2022-11-02 20:56:04,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:56:04,835 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 867 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:04,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 521 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:56:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-11-02 20:56:04,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 351. [2022-11-02 20:56:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 273 states have (on average 1.7326007326007327) internal successors, (473), 338 states have internal predecessors, (473), 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) [2022-11-02 20:56:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 493 transitions. [2022-11-02 20:56:04,851 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 493 transitions. Word has length 17 [2022-11-02 20:56:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:04,852 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 493 transitions. [2022-11-02 20:56:04,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-11-02 20:56:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 493 transitions. [2022-11-02 20:56:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:56:04,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:04,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:04,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:56:04,855 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:04,856 INFO L85 PathProgramCache]: Analyzing trace with hash 742849515, now seen corresponding path program 1 times [2022-11-02 20:56:04,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:04,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204941825] [2022-11-02 20:56:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:04,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:05,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:05,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:05,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204941825] [2022-11-02 20:56:05,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204941825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:05,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:05,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:05,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276560038] [2022-11-02 20:56:05,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:05,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:56:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:05,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:56:05,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:56:05,097 INFO L87 Difference]: Start difference. First operand 351 states and 493 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-02 20:56:05,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:05,977 INFO L93 Difference]: Finished difference Result 766 states and 951 transitions. [2022-11-02 20:56:05,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:56:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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 17 [2022-11-02 20:56:05,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:05,981 INFO L225 Difference]: With dead ends: 766 [2022-11-02 20:56:05,982 INFO L226 Difference]: Without dead ends: 766 [2022-11-02 20:56:05,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:56:05,983 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 895 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:05,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 697 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:56:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-02 20:56:05,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 384. [2022-11-02 20:56:05,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 304 states have (on average 1.7203947368421053) internal successors, (523), 370 states have internal predecessors, (523), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (14), 8 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-02 20:56:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 547 transitions. [2022-11-02 20:56:05,999 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 547 transitions. Word has length 17 [2022-11-02 20:56:05,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:05,999 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 547 transitions. [2022-11-02 20:56:05,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-02 20:56:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 547 transitions. [2022-11-02 20:56:06,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:56:06,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:06,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:06,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:56:06,001 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:06,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1064604948, now seen corresponding path program 1 times [2022-11-02 20:56:06,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952792691] [2022-11-02 20:56:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:06,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:06,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:06,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952792691] [2022-11-02 20:56:06,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952792691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:06,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:06,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208876355] [2022-11-02 20:56:06,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:06,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:06,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:06,117 INFO L87 Difference]: Start difference. First operand 384 states and 547 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-11-02 20:56:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:06,178 INFO L93 Difference]: Finished difference Result 614 states and 849 transitions. [2022-11-02 20:56:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:56:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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 17 [2022-11-02 20:56:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:06,181 INFO L225 Difference]: With dead ends: 614 [2022-11-02 20:56:06,182 INFO L226 Difference]: Without dead ends: 614 [2022-11-02 20:56:06,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:56:06,183 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 243 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:06,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1545 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-02 20:56:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 394. [2022-11-02 20:56:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 311 states have (on average 1.7009646302250805) internal successors, (529), 379 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-02 20:56:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 559 transitions. [2022-11-02 20:56:06,195 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 559 transitions. Word has length 17 [2022-11-02 20:56:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:06,195 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 559 transitions. [2022-11-02 20:56:06,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-11-02 20:56:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 559 transitions. [2022-11-02 20:56:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:56:06,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:06,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:06,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:56:06,196 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:06,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:06,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1357040557, now seen corresponding path program 1 times [2022-11-02 20:56:06,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:06,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018678513] [2022-11-02 20:56:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:06,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:06,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:06,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:06,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018678513] [2022-11-02 20:56:06,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018678513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:06,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:06,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:06,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679319028] [2022-11-02 20:56:06,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:06,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:06,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:06,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:06,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:06,426 INFO L87 Difference]: Start difference. First operand 394 states and 559 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-11-02 20:56:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:07,368 INFO L93 Difference]: Finished difference Result 793 states and 993 transitions. [2022-11-02 20:56:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:56:07,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 18 [2022-11-02 20:56:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:07,371 INFO L225 Difference]: With dead ends: 793 [2022-11-02 20:56:07,371 INFO L226 Difference]: Without dead ends: 793 [2022-11-02 20:56:07,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:56:07,372 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 545 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:07,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 835 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:56:07,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-02 20:56:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 391. [2022-11-02 20:56:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 308 states have (on average 1.7012987012987013) internal successors, (524), 376 states have internal predecessors, (524), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-02 20:56:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 554 transitions. [2022-11-02 20:56:07,386 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 554 transitions. Word has length 18 [2022-11-02 20:56:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:07,386 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 554 transitions. [2022-11-02 20:56:07,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-11-02 20:56:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 554 transitions. [2022-11-02 20:56:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:56:07,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:07,387 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] [2022-11-02 20:56:07,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:56:07,388 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:07,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1279047357, now seen corresponding path program 1 times [2022-11-02 20:56:07,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:07,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160094214] [2022-11-02 20:56:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:07,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:07,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:07,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:07,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160094214] [2022-11-02 20:56:07,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160094214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:07,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:07,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:56:07,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841882176] [2022-11-02 20:56:07,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:07,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:56:07,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:07,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:56:07,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:56:07,889 INFO L87 Difference]: Start difference. First operand 391 states and 554 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) [2022-11-02 20:56:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:08,733 INFO L93 Difference]: Finished difference Result 813 states and 1121 transitions. [2022-11-02 20:56:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:56:08,733 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 [2022-11-02 20:56:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:08,740 INFO L225 Difference]: With dead ends: 813 [2022-11-02 20:56:08,740 INFO L226 Difference]: Without dead ends: 811 [2022-11-02 20:56:08,740 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 [2022-11-02 20:56:08,741 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 568 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:08,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1860 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:56:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-02 20:56:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 385. [2022-11-02 20:56:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 302 states have (on average 1.6986754966887416) internal successors, (513), 370 states have internal predecessors, (513), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 9 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-02 20:56:08,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 543 transitions. [2022-11-02 20:56:08,757 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 543 transitions. Word has length 21 [2022-11-02 20:56:08,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:08,757 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 543 transitions. [2022-11-02 20:56:08,758 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) [2022-11-02 20:56:08,758 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 543 transitions. [2022-11-02 20:56:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:56:08,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:08,761 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] [2022-11-02 20:56:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-02 20:56:08,762 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2000662896, now seen corresponding path program 1 times [2022-11-02 20:56:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:08,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645641771] [2022-11-02 20:56:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:08,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:09,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:09,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:09,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645641771] [2022-11-02 20:56:09,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645641771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:09,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:09,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:56:09,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385739322] [2022-11-02 20:56:09,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:09,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:56:09,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:09,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:56:09,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:56:09,180 INFO L87 Difference]: Start difference. First operand 385 states and 543 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2022-11-02 20:56:09,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:09,693 INFO L93 Difference]: Finished difference Result 548 states and 728 transitions. [2022-11-02 20:56:09,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:56:09,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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 [2022-11-02 20:56:09,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:09,696 INFO L225 Difference]: With dead ends: 548 [2022-11-02 20:56:09,696 INFO L226 Difference]: Without dead ends: 548 [2022-11-02 20:56:09,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:56:09,697 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 200 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:09,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1103 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-11-02 20:56:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 401. [2022-11-02 20:56:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 318 states have (on average 1.6761006289308176) internal successors, (533), 384 states have internal predecessors, (533), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-02 20:56:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 563 transitions. [2022-11-02 20:56:09,712 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 563 transitions. Word has length 21 [2022-11-02 20:56:09,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:09,712 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 563 transitions. [2022-11-02 20:56:09,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 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) [2022-11-02 20:56:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 563 transitions. [2022-11-02 20:56:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:56:09,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:09,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:09,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-02 20:56:09,714 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:09,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:09,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1680606867, now seen corresponding path program 1 times [2022-11-02 20:56:09,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:09,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024970630] [2022-11-02 20:56:09,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:09,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:09,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:09,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:09,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024970630] [2022-11-02 20:56:09,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024970630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:09,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:09,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:09,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120001662] [2022-11-02 20:56:09,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:09,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:09,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:09,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:09,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:09,839 INFO L87 Difference]: Start difference. First operand 401 states and 563 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-02 20:56:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:09,895 INFO L93 Difference]: Finished difference Result 646 states and 894 transitions. [2022-11-02 20:56:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:56:09,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2022-11-02 20:56:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:09,899 INFO L225 Difference]: With dead ends: 646 [2022-11-02 20:56:09,900 INFO L226 Difference]: Without dead ends: 646 [2022-11-02 20:56:09,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:56:09,901 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 245 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:09,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1235 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-11-02 20:56:09,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 403. [2022-11-02 20:56:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 320 states have (on average 1.671875) internal successors, (535), 386 states have internal predecessors, (535), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-02 20:56:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 565 transitions. [2022-11-02 20:56:09,914 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 565 transitions. Word has length 22 [2022-11-02 20:56:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:09,915 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 565 transitions. [2022-11-02 20:56:09,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-02 20:56:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 565 transitions. [2022-11-02 20:56:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:56:09,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:09,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:09,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-02 20:56:09,919 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash -839353067, now seen corresponding path program 1 times [2022-11-02 20:56:09,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:09,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015034356] [2022-11-02 20:56:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:09,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:10,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:10,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015034356] [2022-11-02 20:56:10,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015034356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:10,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:10,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:10,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378375479] [2022-11-02 20:56:10,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:10,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:10,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:10,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:10,040 INFO L87 Difference]: Start difference. First operand 403 states and 565 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-02 20:56:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:10,094 INFO L93 Difference]: Finished difference Result 642 states and 886 transitions. [2022-11-02 20:56:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:56:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2022-11-02 20:56:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:10,097 INFO L225 Difference]: With dead ends: 642 [2022-11-02 20:56:10,097 INFO L226 Difference]: Without dead ends: 642 [2022-11-02 20:56:10,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:56:10,098 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 242 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1251 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:10,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1251 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-11-02 20:56:10,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 401. [2022-11-02 20:56:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 318 states have (on average 1.6635220125786163) internal successors, (529), 384 states have internal predecessors, (529), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-02 20:56:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 559 transitions. [2022-11-02 20:56:10,109 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 559 transitions. Word has length 22 [2022-11-02 20:56:10,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:10,110 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 559 transitions. [2022-11-02 20:56:10,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-02 20:56:10,110 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 559 transitions. [2022-11-02 20:56:10,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:56:10,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:10,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:10,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-02 20:56:10,111 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1175048242, now seen corresponding path program 1 times [2022-11-02 20:56:10,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:10,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967405131] [2022-11-02 20:56:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:10,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:10,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:10,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:10,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967405131] [2022-11-02 20:56:10,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967405131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:10,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:10,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:56:10,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218504081] [2022-11-02 20:56:10,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:10,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:56:10,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:56:10,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:56:10,342 INFO L87 Difference]: Start difference. First operand 401 states and 559 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-11-02 20:56:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:10,735 INFO L93 Difference]: Finished difference Result 578 states and 779 transitions. [2022-11-02 20:56:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:56:10,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 22 [2022-11-02 20:56:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:10,741 INFO L225 Difference]: With dead ends: 578 [2022-11-02 20:56:10,741 INFO L226 Difference]: Without dead ends: 578 [2022-11-02 20:56:10,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:56:10,742 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 194 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:10,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1197 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-11-02 20:56:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 411. [2022-11-02 20:56:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 328 states have (on average 1.649390243902439) internal successors, (541), 392 states have internal predecessors, (541), 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) [2022-11-02 20:56:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 571 transitions. [2022-11-02 20:56:10,753 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 571 transitions. Word has length 22 [2022-11-02 20:56:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:10,754 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 571 transitions. [2022-11-02 20:56:10,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-11-02 20:56:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 571 transitions. [2022-11-02 20:56:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:56:10,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:10,755 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] [2022-11-02 20:56:10,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-02 20:56:10,755 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:10,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:10,756 INFO L85 PathProgramCache]: Analyzing trace with hash -796222002, now seen corresponding path program 1 times [2022-11-02 20:56:10,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:10,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670268070] [2022-11-02 20:56:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:10,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:10,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:10,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:10,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670268070] [2022-11-02 20:56:10,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670268070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:10,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:10,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993654089] [2022-11-02 20:56:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:10,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:10,839 INFO L87 Difference]: Start difference. First operand 411 states and 571 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) [2022-11-02 20:56:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:11,120 INFO L93 Difference]: Finished difference Result 654 states and 844 transitions. [2022-11-02 20:56:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:11,121 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 [2022-11-02 20:56:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:11,123 INFO L225 Difference]: With dead ends: 654 [2022-11-02 20:56:11,123 INFO L226 Difference]: Without dead ends: 654 [2022-11-02 20:56:11,123 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 [2022-11-02 20:56:11,124 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 303 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:11,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 442 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-11-02 20:56:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 439. [2022-11-02 20:56:11,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 356 states have (on average 1.6657303370786516) internal successors, (593), 420 states have internal predecessors, (593), 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) [2022-11-02 20:56:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 623 transitions. [2022-11-02 20:56:11,136 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 623 transitions. Word has length 23 [2022-11-02 20:56:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:11,136 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 623 transitions. [2022-11-02 20:56:11,136 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) [2022-11-02 20:56:11,137 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 623 transitions. [2022-11-02 20:56:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:56:11,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:11,137 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] [2022-11-02 20:56:11,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-02 20:56:11,138 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:11,138 INFO L85 PathProgramCache]: Analyzing trace with hash -796222001, now seen corresponding path program 1 times [2022-11-02 20:56:11,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:11,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945758961] [2022-11-02 20:56:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:11,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:11,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:11,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:11,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945758961] [2022-11-02 20:56:11,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945758961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:11,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:11,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:11,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114793633] [2022-11-02 20:56:11,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:11,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:11,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:11,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:11,345 INFO L87 Difference]: Start difference. First operand 439 states and 623 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) [2022-11-02 20:56:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:11,651 INFO L93 Difference]: Finished difference Result 491 states and 648 transitions. [2022-11-02 20:56:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:56:11,652 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 [2022-11-02 20:56:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:11,653 INFO L225 Difference]: With dead ends: 491 [2022-11-02 20:56:11,653 INFO L226 Difference]: Without dead ends: 491 [2022-11-02 20:56:11,654 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 [2022-11-02 20:56:11,654 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 366 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:11,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 543 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-02 20:56:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 439. [2022-11-02 20:56:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 356 states have (on average 1.6404494382022472) internal successors, (584), 420 states have internal predecessors, (584), 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) [2022-11-02 20:56:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 614 transitions. [2022-11-02 20:56:11,665 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 614 transitions. Word has length 23 [2022-11-02 20:56:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:11,665 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 614 transitions. [2022-11-02 20:56:11,665 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) [2022-11-02 20:56:11,665 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 614 transitions. [2022-11-02 20:56:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:56:11,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:11,666 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] [2022-11-02 20:56:11,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-02 20:56:11,666 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1911985061, now seen corresponding path program 1 times [2022-11-02 20:56:11,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:11,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114782708] [2022-11-02 20:56:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:11,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:11,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:11,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114782708] [2022-11-02 20:56:11,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114782708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:11,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:11,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:11,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334827015] [2022-11-02 20:56:11,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:11,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:11,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:11,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:11,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:11,702 INFO L87 Difference]: Start difference. First operand 439 states and 614 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2022-11-02 20:56:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:11,724 INFO L93 Difference]: Finished difference Result 451 states and 626 transitions. [2022-11-02 20:56:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:56:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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 [2022-11-02 20:56:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:11,727 INFO L225 Difference]: With dead ends: 451 [2022-11-02 20:56:11,727 INFO L226 Difference]: Without dead ends: 451 [2022-11-02 20:56:11,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:11,728 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 3 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:11,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 541 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:11,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-02 20:56:11,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 448. [2022-11-02 20:56:11,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 365 states have (on average 1.6246575342465754) internal successors, (593), 429 states have internal predecessors, (593), 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) [2022-11-02 20:56:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 623 transitions. [2022-11-02 20:56:11,738 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 623 transitions. Word has length 25 [2022-11-02 20:56:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:11,739 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 623 transitions. [2022-11-02 20:56:11,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 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) [2022-11-02 20:56:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 623 transitions. [2022-11-02 20:56:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:56:11,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:11,740 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] [2022-11-02 20:56:11,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-02 20:56:11,740 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:11,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1913832103, now seen corresponding path program 1 times [2022-11-02 20:56:11,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:11,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742488943] [2022-11-02 20:56:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:11,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:11,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:11,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:11,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742488943] [2022-11-02 20:56:11,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742488943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:11,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:11,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:11,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592006327] [2022-11-02 20:56:11,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:11,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:11,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:11,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:11,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:11,824 INFO L87 Difference]: Start difference. First operand 448 states and 623 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 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) [2022-11-02 20:56:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:12,050 INFO L93 Difference]: Finished difference Result 756 states and 1001 transitions. [2022-11-02 20:56:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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 [2022-11-02 20:56:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:12,053 INFO L225 Difference]: With dead ends: 756 [2022-11-02 20:56:12,053 INFO L226 Difference]: Without dead ends: 756 [2022-11-02 20:56:12,053 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 [2022-11-02 20:56:12,054 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 427 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:12,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 455 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-11-02 20:56:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 507. [2022-11-02 20:56:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 425 states have (on average 1.6) internal successors, (680), 488 states have internal predecessors, (680), 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) [2022-11-02 20:56:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 710 transitions. [2022-11-02 20:56:12,086 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 710 transitions. Word has length 25 [2022-11-02 20:56:12,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:12,086 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 710 transitions. [2022-11-02 20:56:12,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 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) [2022-11-02 20:56:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 710 transitions. [2022-11-02 20:56:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:56:12,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:12,088 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] [2022-11-02 20:56:12,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-02 20:56:12,088 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:12,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1913832102, now seen corresponding path program 1 times [2022-11-02 20:56:12,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:12,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141184289] [2022-11-02 20:56:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:12,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:12,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:12,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:12,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141184289] [2022-11-02 20:56:12,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141184289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:12,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:12,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:56:12,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354938817] [2022-11-02 20:56:12,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:12,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:56:12,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:12,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:56:12,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:56:12,136 INFO L87 Difference]: Start difference. First operand 507 states and 710 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 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) [2022-11-02 20:56:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:12,256 INFO L93 Difference]: Finished difference Result 594 states and 801 transitions. [2022-11-02 20:56:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:56:12,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 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 [2022-11-02 20:56:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:12,259 INFO L225 Difference]: With dead ends: 594 [2022-11-02 20:56:12,259 INFO L226 Difference]: Without dead ends: 594 [2022-11-02 20:56:12,259 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 [2022-11-02 20:56:12,260 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 148 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:12,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 272 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:56:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-11-02 20:56:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 504. [2022-11-02 20:56:12,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 425 states have (on average 1.571764705882353) internal successors, (668), 485 states have internal predecessors, (668), 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) [2022-11-02 20:56:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 698 transitions. [2022-11-02 20:56:12,277 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 698 transitions. Word has length 25 [2022-11-02 20:56:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:12,277 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 698 transitions. [2022-11-02 20:56:12,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 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) [2022-11-02 20:56:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 698 transitions. [2022-11-02 20:56:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:56:12,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:12,278 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] [2022-11-02 20:56:12,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-02 20:56:12,279 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:12,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2102112361, now seen corresponding path program 1 times [2022-11-02 20:56:12,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:12,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973166951] [2022-11-02 20:56:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:12,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:12,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:12,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973166951] [2022-11-02 20:56:12,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973166951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:12,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:12,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:12,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681325303] [2022-11-02 20:56:12,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:12,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:12,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:12,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:12,376 INFO L87 Difference]: Start difference. First operand 504 states and 698 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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) [2022-11-02 20:56:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:12,611 INFO L93 Difference]: Finished difference Result 810 states and 1070 transitions. [2022-11-02 20:56:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:12,612 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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 [2022-11-02 20:56:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:12,615 INFO L225 Difference]: With dead ends: 810 [2022-11-02 20:56:12,615 INFO L226 Difference]: Without dead ends: 810 [2022-11-02 20:56:12,616 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 [2022-11-02 20:56:12,616 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 326 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:12,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 515 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-02 20:56:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 504. [2022-11-02 20:56:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 425 states have (on average 1.571764705882353) internal successors, (668), 485 states have internal predecessors, (668), 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) [2022-11-02 20:56:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 698 transitions. [2022-11-02 20:56:12,631 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 698 transitions. Word has length 26 [2022-11-02 20:56:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:12,631 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 698 transitions. [2022-11-02 20:56:12,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 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) [2022-11-02 20:56:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 698 transitions. [2022-11-02 20:56:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:56:12,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:12,632 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] [2022-11-02 20:56:12,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-02 20:56:12,633 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1491790357, now seen corresponding path program 1 times [2022-11-02 20:56:12,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:12,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626675976] [2022-11-02 20:56:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:12,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:12,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:12,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:12,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626675976] [2022-11-02 20:56:12,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626675976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:12,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:12,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:12,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283411791] [2022-11-02 20:56:12,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:12,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:12,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:12,763 INFO L87 Difference]: Start difference. First operand 504 states and 698 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2022-11-02 20:56:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:12,830 INFO L93 Difference]: Finished difference Result 708 states and 959 transitions. [2022-11-02 20:56:12,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:56:12,830 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 [2022-11-02 20:56:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:12,833 INFO L225 Difference]: With dead ends: 708 [2022-11-02 20:56:12,833 INFO L226 Difference]: Without dead ends: 708 [2022-11-02 20:56:12,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:56:12,834 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 233 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:12,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1487 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:12,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-11-02 20:56:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 443. [2022-11-02 20:56:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 365 states have (on average 1.5726027397260274) internal successors, (574), 424 states have internal predecessors, (574), 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) [2022-11-02 20:56:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 604 transitions. [2022-11-02 20:56:12,848 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 604 transitions. Word has length 26 [2022-11-02 20:56:12,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:12,848 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 604 transitions. [2022-11-02 20:56:12,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2022-11-02 20:56:12,848 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 604 transitions. [2022-11-02 20:56:12,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:56:12,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:12,849 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] [2022-11-02 20:56:12,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-02 20:56:12,850 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:12,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash 731575509, now seen corresponding path program 1 times [2022-11-02 20:56:12,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:12,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966630128] [2022-11-02 20:56:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:12,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:13,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:13,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:13,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966630128] [2022-11-02 20:56:13,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966630128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:13,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:13,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:13,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149638010] [2022-11-02 20:56:13,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:13,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:56:13,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:56:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:13,009 INFO L87 Difference]: Start difference. First operand 443 states and 604 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) [2022-11-02 20:56:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:13,203 INFO L93 Difference]: Finished difference Result 517 states and 672 transitions. [2022-11-02 20:56:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:56:13,204 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 [2022-11-02 20:56:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:13,206 INFO L225 Difference]: With dead ends: 517 [2022-11-02 20:56:13,206 INFO L226 Difference]: Without dead ends: 517 [2022-11-02 20:56:13,206 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 [2022-11-02 20:56:13,206 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 167 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:13,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 660 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-11-02 20:56:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 443. [2022-11-02 20:56:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 365 states have (on average 1.5698630136986302) internal successors, (573), 424 states have internal predecessors, (573), 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) [2022-11-02 20:56:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 603 transitions. [2022-11-02 20:56:13,217 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 603 transitions. Word has length 27 [2022-11-02 20:56:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:13,218 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 603 transitions. [2022-11-02 20:56:13,218 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) [2022-11-02 20:56:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 603 transitions. [2022-11-02 20:56:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:56:13,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:13,219 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] [2022-11-02 20:56:13,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-02 20:56:13,219 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash 946649543, now seen corresponding path program 1 times [2022-11-02 20:56:13,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:13,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205888991] [2022-11-02 20:56:13,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:13,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:13,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:13,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:13,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205888991] [2022-11-02 20:56:13,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205888991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:13,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:13,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:56:13,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170661657] [2022-11-02 20:56:13,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:13,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:56:13,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:13,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:56:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:56:13,329 INFO L87 Difference]: Start difference. First operand 443 states and 603 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2022-11-02 20:56:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:13,569 INFO L93 Difference]: Finished difference Result 645 states and 864 transitions. [2022-11-02 20:56:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:56:13,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 [2022-11-02 20:56:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:13,572 INFO L225 Difference]: With dead ends: 645 [2022-11-02 20:56:13,572 INFO L226 Difference]: Without dead ends: 645 [2022-11-02 20:56:13,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:56:13,573 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 158 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:13,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1294 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-02 20:56:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 473. [2022-11-02 20:56:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 395 states have (on average 1.539240506329114) internal successors, (608), 454 states have internal predecessors, (608), 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) [2022-11-02 20:56:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 638 transitions. [2022-11-02 20:56:13,592 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 638 transitions. Word has length 27 [2022-11-02 20:56:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:13,592 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 638 transitions. [2022-11-02 20:56:13,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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) [2022-11-02 20:56:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 638 transitions. [2022-11-02 20:56:13,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:56:13,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:13,594 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] [2022-11-02 20:56:13,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-02 20:56:13,595 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash 946649737, now seen corresponding path program 1 times [2022-11-02 20:56:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:13,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162369606] [2022-11-02 20:56:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:13,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:13,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:13,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162369606] [2022-11-02 20:56:13,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162369606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:13,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:13,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:13,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935616525] [2022-11-02 20:56:13,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:13,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:13,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:13,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:13,697 INFO L87 Difference]: Start difference. First operand 473 states and 638 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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) [2022-11-02 20:56:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:13,898 INFO L93 Difference]: Finished difference Result 808 states and 1039 transitions. [2022-11-02 20:56:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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 [2022-11-02 20:56:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:13,902 INFO L225 Difference]: With dead ends: 808 [2022-11-02 20:56:13,902 INFO L226 Difference]: Without dead ends: 808 [2022-11-02 20:56:13,902 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 [2022-11-02 20:56:13,903 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 482 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:13,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 405 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:13,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-02 20:56:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 563. [2022-11-02 20:56:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 485 states have (on average 1.5175257731958762) internal successors, (736), 544 states have internal predecessors, (736), 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) [2022-11-02 20:56:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 766 transitions. [2022-11-02 20:56:13,923 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 766 transitions. Word has length 27 [2022-11-02 20:56:13,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:13,923 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 766 transitions. [2022-11-02 20:56:13,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 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) [2022-11-02 20:56:13,923 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 766 transitions. [2022-11-02 20:56:13,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:56:13,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:13,924 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] [2022-11-02 20:56:13,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-02 20:56:13,924 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:13,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:13,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1204004541, now seen corresponding path program 1 times [2022-11-02 20:56:13,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:13,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667650043] [2022-11-02 20:56:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:13,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:14,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:14,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:14,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667650043] [2022-11-02 20:56:14,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667650043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:14,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:14,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:14,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454381955] [2022-11-02 20:56:14,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:14,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:56:14,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:14,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:56:14,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:14,099 INFO L87 Difference]: Start difference. First operand 563 states and 766 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) [2022-11-02 20:56:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:14,333 INFO L93 Difference]: Finished difference Result 758 states and 993 transitions. [2022-11-02 20:56:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:56:14,333 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 [2022-11-02 20:56:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:14,336 INFO L225 Difference]: With dead ends: 758 [2022-11-02 20:56:14,336 INFO L226 Difference]: Without dead ends: 758 [2022-11-02 20:56:14,336 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 [2022-11-02 20:56:14,337 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 218 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:14,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 665 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-11-02 20:56:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 601. [2022-11-02 20:56:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 519 states have (on average 1.5144508670520231) internal successors, (786), 580 states have internal predecessors, (786), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-02 20:56:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 822 transitions. [2022-11-02 20:56:14,357 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 822 transitions. Word has length 28 [2022-11-02 20:56:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:14,357 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 822 transitions. [2022-11-02 20:56:14,357 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) [2022-11-02 20:56:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 822 transitions. [2022-11-02 20:56:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:56:14,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:14,358 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] [2022-11-02 20:56:14,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-02 20:56:14,358 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:14,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1495351243, now seen corresponding path program 1 times [2022-11-02 20:56:14,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:14,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524024242] [2022-11-02 20:56:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:14,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:14,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:14,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:14,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524024242] [2022-11-02 20:56:14,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524024242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:14,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:14,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:56:14,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378185446] [2022-11-02 20:56:14,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:14,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:14,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:14,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:14,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:14,472 INFO L87 Difference]: Start difference. First operand 601 states and 822 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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) [2022-11-02 20:56:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:14,706 INFO L93 Difference]: Finished difference Result 845 states and 1089 transitions. [2022-11-02 20:56:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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 [2022-11-02 20:56:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:14,713 INFO L225 Difference]: With dead ends: 845 [2022-11-02 20:56:14,714 INFO L226 Difference]: Without dead ends: 845 [2022-11-02 20:56:14,714 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 [2022-11-02 20:56:14,715 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 317 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:14,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 518 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-02 20:56:14,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 510. [2022-11-02 20:56:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 429 states have (on average 1.5198135198135199) internal successors, (652), 489 states have internal predecessors, (652), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-02 20:56:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 688 transitions. [2022-11-02 20:56:14,732 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 688 transitions. Word has length 28 [2022-11-02 20:56:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:14,733 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 688 transitions. [2022-11-02 20:56:14,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 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) [2022-11-02 20:56:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 688 transitions. [2022-11-02 20:56:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:56:14,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:14,734 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] [2022-11-02 20:56:14,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-02 20:56:14,736 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1910467130, now seen corresponding path program 1 times [2022-11-02 20:56:14,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:14,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64970176] [2022-11-02 20:56:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:14,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:14,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:14,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:14,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:14,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64970176] [2022-11-02 20:56:14,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64970176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:14,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:14,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:14,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798515622] [2022-11-02 20:56:14,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:14,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:56:14,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:14,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:56:14,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:56:14,922 INFO L87 Difference]: Start difference. First operand 510 states and 688 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) 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) [2022-11-02 20:56:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:15,304 INFO L93 Difference]: Finished difference Result 1252 states and 1682 transitions. [2022-11-02 20:56:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:56:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) 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 [2022-11-02 20:56:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:15,308 INFO L225 Difference]: With dead ends: 1252 [2022-11-02 20:56:15,308 INFO L226 Difference]: Without dead ends: 1252 [2022-11-02 20:56:15,309 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 [2022-11-02 20:56:15,310 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 540 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:15,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1622 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-11-02 20:56:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 644. [2022-11-02 20:56:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 563 states have (on average 1.5204262877442274) internal successors, (856), 617 states have internal predecessors, (856), 12 states have call successors, (12), 6 states have call predecessors, (12), 12 states have return successors, (24), 20 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-02 20:56:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 892 transitions. [2022-11-02 20:56:15,330 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 892 transitions. Word has length 30 [2022-11-02 20:56:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:15,330 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 892 transitions. [2022-11-02 20:56:15,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) 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) [2022-11-02 20:56:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 892 transitions. [2022-11-02 20:56:15,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:56:15,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:15,331 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] [2022-11-02 20:56:15,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-02 20:56:15,332 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:15,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1702169087, now seen corresponding path program 1 times [2022-11-02 20:56:15,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:15,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194949156] [2022-11-02 20:56:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:15,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:15,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:15,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:15,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194949156] [2022-11-02 20:56:15,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194949156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:15,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:15,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:15,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328354098] [2022-11-02 20:56:15,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:15,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:15,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:15,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:15,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:15,554 INFO L87 Difference]: Start difference. First operand 644 states and 892 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) [2022-11-02 20:56:16,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:16,214 INFO L93 Difference]: Finished difference Result 1137 states and 1525 transitions. [2022-11-02 20:56:16,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:56:16,215 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 [2022-11-02 20:56:16,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:16,219 INFO L225 Difference]: With dead ends: 1137 [2022-11-02 20:56:16,219 INFO L226 Difference]: Without dead ends: 1137 [2022-11-02 20:56:16,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:56:16,220 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 470 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:16,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1053 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:56:16,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-11-02 20:56:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 687. [2022-11-02 20:56:16,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 602 states have (on average 1.5016611295681064) internal successors, (904), 657 states have internal predecessors, (904), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 946 transitions. [2022-11-02 20:56:16,239 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 946 transitions. Word has length 30 [2022-11-02 20:56:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:16,240 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 946 transitions. [2022-11-02 20:56:16,240 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) [2022-11-02 20:56:16,240 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 946 transitions. [2022-11-02 20:56:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:56:16,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:16,241 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] [2022-11-02 20:56:16,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-02 20:56:16,241 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:16,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1975675941, now seen corresponding path program 1 times [2022-11-02 20:56:16,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:16,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144801201] [2022-11-02 20:56:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:16,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:16,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:16,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144801201] [2022-11-02 20:56:16,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144801201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:16,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:16,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:16,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846327774] [2022-11-02 20:56:16,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:16,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:56:16,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:16,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:56:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:16,351 INFO L87 Difference]: Start difference. First operand 687 states and 946 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-11-02 20:56:16,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:16,399 INFO L93 Difference]: Finished difference Result 1055 states and 1417 transitions. [2022-11-02 20:56:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:56:16,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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 [2022-11-02 20:56:16,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:16,403 INFO L225 Difference]: With dead ends: 1055 [2022-11-02 20:56:16,403 INFO L226 Difference]: Without dead ends: 1055 [2022-11-02 20:56:16,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:16,404 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 226 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:16,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1130 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:16,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-11-02 20:56:16,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 679. [2022-11-02 20:56:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 594 states have (on average 1.5016835016835017) internal successors, (892), 649 states have internal predecessors, (892), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 934 transitions. [2022-11-02 20:56:16,441 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 934 transitions. Word has length 30 [2022-11-02 20:56:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:16,441 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 934 transitions. [2022-11-02 20:56:16,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 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) [2022-11-02 20:56:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 934 transitions. [2022-11-02 20:56:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:56:16,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:16,442 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] [2022-11-02 20:56:16,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-02 20:56:16,442 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:16,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:16,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1977522983, now seen corresponding path program 1 times [2022-11-02 20:56:16,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:16,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877700489] [2022-11-02 20:56:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:16,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:16,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:16,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:16,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877700489] [2022-11-02 20:56:16,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877700489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:16,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:16,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:16,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230815907] [2022-11-02 20:56:16,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:16,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:56:16,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:56:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:56:16,571 INFO L87 Difference]: Start difference. First operand 679 states and 934 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) 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) [2022-11-02 20:56:16,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:16,946 INFO L93 Difference]: Finished difference Result 1259 states and 1668 transitions. [2022-11-02 20:56:16,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:56:16,947 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) 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 [2022-11-02 20:56:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:16,951 INFO L225 Difference]: With dead ends: 1259 [2022-11-02 20:56:16,951 INFO L226 Difference]: Without dead ends: 1259 [2022-11-02 20:56:16,952 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 [2022-11-02 20:56:16,956 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 502 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:16,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 1798 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-11-02 20:56:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 646. [2022-11-02 20:56:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 564 states have (on average 1.4663120567375887) internal successors, (827), 616 states have internal predecessors, (827), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 869 transitions. [2022-11-02 20:56:16,974 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 869 transitions. Word has length 30 [2022-11-02 20:56:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:16,974 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 869 transitions. [2022-11-02 20:56:16,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) 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) [2022-11-02 20:56:16,975 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 869 transitions. [2022-11-02 20:56:16,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:56:16,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:16,976 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] [2022-11-02 20:56:16,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-02 20:56:16,976 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1227634393, now seen corresponding path program 1 times [2022-11-02 20:56:16,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:16,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007194347] [2022-11-02 20:56:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:16,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:17,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:17,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:17,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007194347] [2022-11-02 20:56:17,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007194347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:17,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:17,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:17,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647326114] [2022-11-02 20:56:17,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:17,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:56:17,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:56:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:56:17,232 INFO L87 Difference]: Start difference. First operand 646 states and 869 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) [2022-11-02 20:56:17,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:17,740 INFO L93 Difference]: Finished difference Result 925 states and 1194 transitions. [2022-11-02 20:56:17,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:56:17,741 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 [2022-11-02 20:56:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:17,744 INFO L225 Difference]: With dead ends: 925 [2022-11-02 20:56:17,744 INFO L226 Difference]: Without dead ends: 925 [2022-11-02 20:56:17,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:56:17,745 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 573 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:17,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 759 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:17,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-11-02 20:56:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 646. [2022-11-02 20:56:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 564 states have (on average 1.4592198581560283) internal successors, (823), 616 states have internal predecessors, (823), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 22 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 865 transitions. [2022-11-02 20:56:17,761 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 865 transitions. Word has length 31 [2022-11-02 20:56:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:17,761 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 865 transitions. [2022-11-02 20:56:17,762 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) [2022-11-02 20:56:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 865 transitions. [2022-11-02 20:56:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:56:17,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:17,762 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, 1] [2022-11-02 20:56:17,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-02 20:56:17,763 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2007870586, now seen corresponding path program 1 times [2022-11-02 20:56:17,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:17,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132499565] [2022-11-02 20:56:17,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:18,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:18,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132499565] [2022-11-02 20:56:18,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132499565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:18,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:18,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:56:18,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032264129] [2022-11-02 20:56:18,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:18,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:18,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:18,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:18,070 INFO L87 Difference]: Start difference. First operand 646 states and 865 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2022-11-02 20:56:18,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:18,355 INFO L93 Difference]: Finished difference Result 695 states and 913 transitions. [2022-11-02 20:56:18,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:56:18,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 32 [2022-11-02 20:56:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:18,358 INFO L225 Difference]: With dead ends: 695 [2022-11-02 20:56:18,358 INFO L226 Difference]: Without dead ends: 695 [2022-11-02 20:56:18,359 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 [2022-11-02 20:56:18,359 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 110 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:18,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 835 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-11-02 20:56:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 625. [2022-11-02 20:56:18,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 543 states have (on average 1.4659300184162063) internal successors, (796), 597 states have internal predecessors, (796), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 838 transitions. [2022-11-02 20:56:18,372 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 838 transitions. Word has length 32 [2022-11-02 20:56:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:18,373 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 838 transitions. [2022-11-02 20:56:18,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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) [2022-11-02 20:56:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 838 transitions. [2022-11-02 20:56:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:56:18,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:18,374 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, 1, 1, 1, 1] [2022-11-02 20:56:18,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-02 20:56:18,374 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:18,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1362637237, now seen corresponding path program 1 times [2022-11-02 20:56:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:18,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716178632] [2022-11-02 20:56:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:18,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:18,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716178632] [2022-11-02 20:56:18,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716178632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:18,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:18,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:18,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827921825] [2022-11-02 20:56:18,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:18,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:18,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:18,509 INFO L87 Difference]: Start difference. First operand 625 states and 838 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2022-11-02 20:56:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:18,757 INFO L93 Difference]: Finished difference Result 729 states and 966 transitions. [2022-11-02 20:56:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:56:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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 35 [2022-11-02 20:56:18,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:18,760 INFO L225 Difference]: With dead ends: 729 [2022-11-02 20:56:18,761 INFO L226 Difference]: Without dead ends: 729 [2022-11-02 20:56:18,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:56:18,761 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 468 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:18,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 565 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:18,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2022-11-02 20:56:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 624. [2022-11-02 20:56:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 543 states have (on average 1.4622467771639043) internal successors, (794), 596 states have internal predecessors, (794), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 836 transitions. [2022-11-02 20:56:18,782 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 836 transitions. Word has length 35 [2022-11-02 20:56:18,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:18,782 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 836 transitions. [2022-11-02 20:56:18,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2022-11-02 20:56:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 836 transitions. [2022-11-02 20:56:18,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-02 20:56:18,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:18,783 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, 1, 1, 1, 1] [2022-11-02 20:56:18,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-02 20:56:18,784 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:18,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:18,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1362637238, now seen corresponding path program 1 times [2022-11-02 20:56:18,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:18,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113258382] [2022-11-02 20:56:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:18,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:18,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:18,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113258382] [2022-11-02 20:56:18,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113258382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:18,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:18,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:18,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420965127] [2022-11-02 20:56:18,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:18,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:18,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:18,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:18,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:18,999 INFO L87 Difference]: Start difference. First operand 624 states and 836 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2022-11-02 20:56:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:19,223 INFO L93 Difference]: Finished difference Result 661 states and 851 transitions. [2022-11-02 20:56:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:56:19,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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 35 [2022-11-02 20:56:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:19,227 INFO L225 Difference]: With dead ends: 661 [2022-11-02 20:56:19,227 INFO L226 Difference]: Without dead ends: 661 [2022-11-02 20:56:19,227 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 [2022-11-02 20:56:19,227 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 496 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:19,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 618 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:19,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-02 20:56:19,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 623. [2022-11-02 20:56:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 543 states have (on average 1.4585635359116023) internal successors, (792), 595 states have internal predecessors, (792), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 834 transitions. [2022-11-02 20:56:19,241 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 834 transitions. Word has length 35 [2022-11-02 20:56:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:19,241 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 834 transitions. [2022-11-02 20:56:19,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 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) [2022-11-02 20:56:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 834 transitions. [2022-11-02 20:56:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:56:19,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:19,242 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, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:19,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-02 20:56:19,243 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:19,243 INFO L85 PathProgramCache]: Analyzing trace with hash -470637162, now seen corresponding path program 1 times [2022-11-02 20:56:19,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:19,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152595422] [2022-11-02 20:56:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:19,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:19,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:19,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152595422] [2022-11-02 20:56:19,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152595422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:19,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:19,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768165596] [2022-11-02 20:56:19,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:56:19,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:56:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:19,347 INFO L87 Difference]: Start difference. First operand 623 states and 834 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-02 20:56:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:19,586 INFO L93 Difference]: Finished difference Result 1070 states and 1398 transitions. [2022-11-02 20:56:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:56:19,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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 37 [2022-11-02 20:56:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:19,591 INFO L225 Difference]: With dead ends: 1070 [2022-11-02 20:56:19,591 INFO L226 Difference]: Without dead ends: 1070 [2022-11-02 20:56:19,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:19,591 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 619 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:19,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 513 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-11-02 20:56:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 620. [2022-11-02 20:56:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 543 states have (on average 1.4475138121546962) internal successors, (786), 592 states have internal predecessors, (786), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 828 transitions. [2022-11-02 20:56:19,614 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 828 transitions. Word has length 37 [2022-11-02 20:56:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:19,615 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 828 transitions. [2022-11-02 20:56:19,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-02 20:56:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 828 transitions. [2022-11-02 20:56:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:56:19,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:19,616 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, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:19,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-02 20:56:19,616 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:19,617 INFO L85 PathProgramCache]: Analyzing trace with hash -470637161, now seen corresponding path program 1 times [2022-11-02 20:56:19,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:19,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574157101] [2022-11-02 20:56:19,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:19,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:19,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:19,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:19,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574157101] [2022-11-02 20:56:19,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574157101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:19,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:19,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:19,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948341928] [2022-11-02 20:56:19,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:19,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:19,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:19,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:19,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:19,815 INFO L87 Difference]: Start difference. First operand 620 states and 828 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 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) [2022-11-02 20:56:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:20,099 INFO L93 Difference]: Finished difference Result 896 states and 1151 transitions. [2022-11-02 20:56:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:56:20,099 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), 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 37 [2022-11-02 20:56:20,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:20,102 INFO L225 Difference]: With dead ends: 896 [2022-11-02 20:56:20,102 INFO L226 Difference]: Without dead ends: 896 [2022-11-02 20:56:20,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:56:20,103 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 770 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:20,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 609 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:20,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-11-02 20:56:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 619. [2022-11-02 20:56:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 543 states have (on average 1.4438305709023942) internal successors, (784), 591 states have internal predecessors, (784), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 826 transitions. [2022-11-02 20:56:20,117 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 826 transitions. Word has length 37 [2022-11-02 20:56:20,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:20,117 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 826 transitions. [2022-11-02 20:56:20,117 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), 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) [2022-11-02 20:56:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 826 transitions. [2022-11-02 20:56:20,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-02 20:56:20,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:20,118 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, 1, 1, 1, 1, 1, 1] [2022-11-02 20:56:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-02 20:56:20,119 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash -470637000, now seen corresponding path program 1 times [2022-11-02 20:56:20,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:20,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175912328] [2022-11-02 20:56:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:20,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:20,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:20,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:20,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175912328] [2022-11-02 20:56:20,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175912328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:20,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:20,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:20,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002433008] [2022-11-02 20:56:20,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:20,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:56:20,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:56:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:56:20,379 INFO L87 Difference]: Start difference. First operand 619 states and 826 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-02 20:56:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:20,783 INFO L93 Difference]: Finished difference Result 787 states and 995 transitions. [2022-11-02 20:56:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:56:20,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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 37 [2022-11-02 20:56:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:20,786 INFO L225 Difference]: With dead ends: 787 [2022-11-02 20:56:20,786 INFO L226 Difference]: Without dead ends: 787 [2022-11-02 20:56:20,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:20,787 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 375 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:20,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 551 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:56:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-11-02 20:56:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 619. [2022-11-02 20:56:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 543 states have (on average 1.4401473296500922) internal successors, (782), 591 states have internal predecessors, (782), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 20 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 824 transitions. [2022-11-02 20:56:20,805 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 824 transitions. Word has length 37 [2022-11-02 20:56:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:20,806 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 824 transitions. [2022-11-02 20:56:20,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 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) [2022-11-02 20:56:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 824 transitions. [2022-11-02 20:56:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 20:56:20,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:20,807 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] [2022-11-02 20:56:20,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-02 20:56:20,808 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:20,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1641938402, now seen corresponding path program 1 times [2022-11-02 20:56:20,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:20,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809829110] [2022-11-02 20:56:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:20,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:20,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:20,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-02 20:56:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:56:20,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:20,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809829110] [2022-11-02 20:56:20,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809829110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:20,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886161888] [2022-11-02 20:56:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:20,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:20,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:20,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:20,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:56:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:21,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-02 20:56:21,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:21,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:21,472 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:56:21,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:56:21,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886161888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:56:21,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:56:21,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-02 20:56:21,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324639206] [2022-11-02 20:56:21,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:21,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:56:21,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:21,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:56:21,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:56:21,522 INFO L87 Difference]: Start difference. First operand 619 states and 824 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) [2022-11-02 20:56:22,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:22,424 INFO L93 Difference]: Finished difference Result 1838 states and 2259 transitions. [2022-11-02 20:56:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:56:22,425 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 [2022-11-02 20:56:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:22,429 INFO L225 Difference]: With dead ends: 1838 [2022-11-02 20:56:22,429 INFO L226 Difference]: Without dead ends: 1838 [2022-11-02 20:56:22,430 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 [2022-11-02 20:56:22,430 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 3347 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3349 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:22,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3349 Valid, 1186 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:56:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2022-11-02 20:56:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 735. [2022-11-02 20:56:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 653 states have (on average 1.3705972434915774) internal successors, (895), 696 states have internal predecessors, (895), 20 states have call successors, (20), 10 states have call predecessors, (20), 20 states have return successors, (40), 28 states have call predecessors, (40), 20 states have call successors, (40) [2022-11-02 20:56:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 955 transitions. [2022-11-02 20:56:22,456 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 955 transitions. Word has length 43 [2022-11-02 20:56:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:22,456 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 955 transitions. [2022-11-02 20:56:22,456 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) [2022-11-02 20:56:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 955 transitions. [2022-11-02 20:56:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:56:22,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:22,457 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] [2022-11-02 20:56:22,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:56:22,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:22,679 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash -974885366, now seen corresponding path program 1 times [2022-11-02 20:56:22,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:22,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844079745] [2022-11-02 20:56:22,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:22,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:22,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:22,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844079745] [2022-11-02 20:56:22,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844079745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:22,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:22,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:22,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864137397] [2022-11-02 20:56:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:22,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:22,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:22,780 INFO L87 Difference]: Start difference. First operand 735 states and 955 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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) [2022-11-02 20:56:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:22,798 INFO L93 Difference]: Finished difference Result 868 states and 1111 transitions. [2022-11-02 20:56:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:22,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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 [2022-11-02 20:56:22,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:22,808 INFO L225 Difference]: With dead ends: 868 [2022-11-02 20:56:22,808 INFO L226 Difference]: Without dead ends: 868 [2022-11-02 20:56:22,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:22,813 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 152 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:22,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 582 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-11-02 20:56:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 691. [2022-11-02 20:56:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 613 states have (on average 1.3800978792822185) internal successors, (846), 656 states have internal predecessors, (846), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 25 states have call predecessors, (36), 18 states have call successors, (36) [2022-11-02 20:56:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 900 transitions. [2022-11-02 20:56:22,838 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 900 transitions. Word has length 45 [2022-11-02 20:56:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:22,839 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 900 transitions. [2022-11-02 20:56:22,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 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) [2022-11-02 20:56:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 900 transitions. [2022-11-02 20:56:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:56:22,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:22,841 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] [2022-11-02 20:56:22,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-02 20:56:22,841 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:22,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:22,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1845991888, now seen corresponding path program 1 times [2022-11-02 20:56:22,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:22,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644307066] [2022-11-02 20:56:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:22,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:23,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:56:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:23,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644307066] [2022-11-02 20:56:23,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644307066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:23,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853212723] [2022-11-02 20:56:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:23,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:23,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:23,010 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:23,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:56:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:23,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:56:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:23,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:56:23,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:23,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:56:23,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:56:23,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:56:23,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853212723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:23,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:56:23,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-02 20:56:23,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151575952] [2022-11-02 20:56:23,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:23,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:56:23,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:56:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:56:23,333 INFO L87 Difference]: Start difference. First operand 691 states and 900 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) [2022-11-02 20:56:23,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:23,719 INFO L93 Difference]: Finished difference Result 605 states and 758 transitions. [2022-11-02 20:56:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:56:23,720 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 45 [2022-11-02 20:56:23,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:23,722 INFO L225 Difference]: With dead ends: 605 [2022-11-02 20:56:23,722 INFO L226 Difference]: Without dead ends: 605 [2022-11-02 20:56:23,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:56:23,722 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 286 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:23,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1441 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-11-02 20:56:23,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 438. [2022-11-02 20:56:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 380 states have (on average 1.4052631578947368) internal successors, (534), 418 states have internal predecessors, (534), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 20:56:23,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 558 transitions. [2022-11-02 20:56:23,730 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 558 transitions. Word has length 45 [2022-11-02 20:56:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:23,731 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 558 transitions. [2022-11-02 20:56:23,731 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) [2022-11-02 20:56:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 558 transitions. [2022-11-02 20:56:23,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:56:23,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:23,732 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] [2022-11-02 20:56:23,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:23,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-02 20:56:23,947 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:23,947 INFO L85 PathProgramCache]: Analyzing trace with hash -102248492, now seen corresponding path program 1 times [2022-11-02 20:56:23,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:23,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503941643] [2022-11-02 20:56:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:23,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:24,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:24,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503941643] [2022-11-02 20:56:24,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503941643] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:24,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:24,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:56:24,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902152275] [2022-11-02 20:56:24,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:24,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:56:24,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:24,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:56:24,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:56:24,354 INFO L87 Difference]: Start difference. First operand 438 states and 558 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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) [2022-11-02 20:56:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:24,985 INFO L93 Difference]: Finished difference Result 836 states and 1072 transitions. [2022-11-02 20:56:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:56:24,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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 [2022-11-02 20:56:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:24,988 INFO L225 Difference]: With dead ends: 836 [2022-11-02 20:56:24,989 INFO L226 Difference]: Without dead ends: 836 [2022-11-02 20:56:24,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:56:24,989 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 752 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:24,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 853 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:56:24,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-02 20:56:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 439. [2022-11-02 20:56:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 382 states have (on average 1.4005235602094241) internal successors, (535), 419 states have internal predecessors, (535), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 20:56:25,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 559 transitions. [2022-11-02 20:56:25,001 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 559 transitions. Word has length 48 [2022-11-02 20:56:25,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:25,001 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 559 transitions. [2022-11-02 20:56:25,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 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) [2022-11-02 20:56:25,002 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 559 transitions. [2022-11-02 20:56:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:56:25,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:25,003 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] [2022-11-02 20:56:25,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-02 20:56:25,003 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:25,004 INFO L85 PathProgramCache]: Analyzing trace with hash -102248430, now seen corresponding path program 1 times [2022-11-02 20:56:25,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:25,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083661250] [2022-11-02 20:56:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:25,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:25,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:25,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083661250] [2022-11-02 20:56:25,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083661250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:25,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:25,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:25,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302706223] [2022-11-02 20:56:25,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:25,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:25,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:25,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:25,219 INFO L87 Difference]: Start difference. First operand 439 states and 559 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 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) [2022-11-02 20:56:25,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:25,402 INFO L93 Difference]: Finished difference Result 454 states and 572 transitions. [2022-11-02 20:56:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:56:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 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 [2022-11-02 20:56:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:25,404 INFO L225 Difference]: With dead ends: 454 [2022-11-02 20:56:25,404 INFO L226 Difference]: Without dead ends: 454 [2022-11-02 20:56:25,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:56:25,404 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 393 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:25,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 318 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-02 20:56:25,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 436. [2022-11-02 20:56:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 380 states have (on average 1.394736842105263) internal successors, (530), 416 states have internal predecessors, (530), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 20:56:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 554 transitions. [2022-11-02 20:56:25,411 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 554 transitions. Word has length 48 [2022-11-02 20:56:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:25,411 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 554 transitions. [2022-11-02 20:56:25,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 6 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) [2022-11-02 20:56:25,411 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 554 transitions. [2022-11-02 20:56:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 20:56:25,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:25,412 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, 1] [2022-11-02 20:56:25,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-02 20:56:25,412 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:25,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1483644560, now seen corresponding path program 1 times [2022-11-02 20:56:25,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:25,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041206850] [2022-11-02 20:56:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:25,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:25,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:56:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:56:25,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:25,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041206850] [2022-11-02 20:56:25,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041206850] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:25,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:25,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:56:25,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947053814] [2022-11-02 20:56:25,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:25,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:56:25,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:56:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:56:25,686 INFO L87 Difference]: Start difference. First operand 436 states and 554 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-11-02 20:56:25,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:25,917 INFO L93 Difference]: Finished difference Result 503 states and 640 transitions. [2022-11-02 20:56:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:56:25,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 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 50 [2022-11-02 20:56:25,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:25,919 INFO L225 Difference]: With dead ends: 503 [2022-11-02 20:56:25,919 INFO L226 Difference]: Without dead ends: 503 [2022-11-02 20:56:25,920 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 [2022-11-02 20:56:25,920 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 465 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:25,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 316 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:56:25,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-11-02 20:56:25,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 434. [2022-11-02 20:56:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 380 states have (on average 1.3631578947368421) internal successors, (518), 414 states have internal predecessors, (518), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 15 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-02 20:56:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 542 transitions. [2022-11-02 20:56:25,929 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 542 transitions. Word has length 50 [2022-11-02 20:56:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:25,930 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 542 transitions. [2022-11-02 20:56:25,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 6 states have internal predecessors, (43), 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) [2022-11-02 20:56:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 542 transitions. [2022-11-02 20:56:25,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:56:25,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:25,931 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, 1, 1, 1] [2022-11-02 20:56:25,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-11-02 20:56:25,931 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:25,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:25,932 INFO L85 PathProgramCache]: Analyzing trace with hash -952792567, now seen corresponding path program 1 times [2022-11-02 20:56:25,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:25,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700214544] [2022-11-02 20:56:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:25,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:26,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:26,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:26,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700214544] [2022-11-02 20:56:26,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700214544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:26,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:26,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-02 20:56:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848752495] [2022-11-02 20:56:26,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:26,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:56:26,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:26,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:56:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:56:26,720 INFO L87 Difference]: Start difference. First operand 434 states and 542 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-11-02 20:56:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:28,138 INFO L93 Difference]: Finished difference Result 1491 states and 1893 transitions. [2022-11-02 20:56:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:56:28,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 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 51 [2022-11-02 20:56:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:28,142 INFO L225 Difference]: With dead ends: 1491 [2022-11-02 20:56:28,142 INFO L226 Difference]: Without dead ends: 1491 [2022-11-02 20:56:28,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=250, Invalid=872, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:56:28,144 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1290 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:28,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 1663 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:56:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-11-02 20:56:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 674. [2022-11-02 20:56:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 609 states have (on average 1.3628899835796386) internal successors, (830), 645 states have internal predecessors, (830), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 872 transitions. [2022-11-02 20:56:28,161 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 872 transitions. Word has length 51 [2022-11-02 20:56:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:28,161 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 872 transitions. [2022-11-02 20:56:28,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 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) [2022-11-02 20:56:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 872 transitions. [2022-11-02 20:56:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-02 20:56:28,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:28,163 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, 1, 1, 1] [2022-11-02 20:56:28,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-02 20:56:28,164 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:28,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash -952792566, now seen corresponding path program 1 times [2022-11-02 20:56:28,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:28,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276929719] [2022-11-02 20:56:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:28,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:29,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:29,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:29,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276929719] [2022-11-02 20:56:29,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276929719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:29,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:29,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:56:29,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355588425] [2022-11-02 20:56:29,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:29,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:56:29,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:56:29,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:56:29,410 INFO L87 Difference]: Start difference. First operand 674 states and 872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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) [2022-11-02 20:56:30,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:30,194 INFO L93 Difference]: Finished difference Result 704 states and 903 transitions. [2022-11-02 20:56:30,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:56:30,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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 51 [2022-11-02 20:56:30,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:30,196 INFO L225 Difference]: With dead ends: 704 [2022-11-02 20:56:30,196 INFO L226 Difference]: Without dead ends: 704 [2022-11-02 20:56:30,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:56:30,197 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 121 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:30,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 895 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:56:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-11-02 20:56:30,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 694. [2022-11-02 20:56:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 629 states have (on average 1.3529411764705883) internal successors, (851), 665 states have internal predecessors, (851), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 893 transitions. [2022-11-02 20:56:30,210 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 893 transitions. Word has length 51 [2022-11-02 20:56:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:30,210 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 893 transitions. [2022-11-02 20:56:30,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 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) [2022-11-02 20:56:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 893 transitions. [2022-11-02 20:56:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:56:30,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:30,211 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, 1, 1, 1, 1] [2022-11-02 20:56:30,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-02 20:56:30,212 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:30,212 INFO L85 PathProgramCache]: Analyzing trace with hash 764231220, now seen corresponding path program 1 times [2022-11-02 20:56:30,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:30,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249802832] [2022-11-02 20:56:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:30,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:31,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:31,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249802832] [2022-11-02 20:56:31,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249802832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739483788] [2022-11-02 20:56:31,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:31,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:31,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:31,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:31,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:56:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:31,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 20:56:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:31,360 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:56:31,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:31,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:31,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:31,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:31,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:31,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:31,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2022-11-02 20:56:31,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2022-11-02 20:56:31,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:56:31,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:56:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:31,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:56:31,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739483788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:31,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:56:31,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 23 [2022-11-02 20:56:31,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364547549] [2022-11-02 20:56:31,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:56:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:31,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:56:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:56:31,882 INFO L87 Difference]: Start difference. First operand 694 states and 893 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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) [2022-11-02 20:56:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:33,067 INFO L93 Difference]: Finished difference Result 1266 states and 1559 transitions. [2022-11-02 20:56:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:56:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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 52 [2022-11-02 20:56:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:33,070 INFO L225 Difference]: With dead ends: 1266 [2022-11-02 20:56:33,070 INFO L226 Difference]: Without dead ends: 1266 [2022-11-02 20:56:33,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:56:33,071 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 721 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 2117 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:33,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 2117 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:56:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-11-02 20:56:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 699. [2022-11-02 20:56:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 634 states have (on average 1.3485804416403786) internal successors, (855), 670 states have internal predecessors, (855), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:56:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 897 transitions. [2022-11-02 20:56:33,089 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 897 transitions. Word has length 52 [2022-11-02 20:56:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:33,089 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 897 transitions. [2022-11-02 20:56:33,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 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) [2022-11-02 20:56:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 897 transitions. [2022-11-02 20:56:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:56:33,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:33,090 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, 1, 1, 1, 1] [2022-11-02 20:56:33,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:33,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-02 20:56:33,311 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash 945744203, now seen corresponding path program 1 times [2022-11-02 20:56:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:33,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151784350] [2022-11-02 20:56:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:33,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:34,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:34,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:34,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151784350] [2022-11-02 20:56:34,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151784350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:34,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246621107] [2022-11-02 20:56:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:34,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:34,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:34,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:34,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:56:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:34,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-02 20:56:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:34,983 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:56:34,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:56:35,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:35,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:35,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:35,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:35,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:35,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:35,634 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-02 20:56:35,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-02 20:56:35,648 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-02 20:56:35,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-02 20:56:36,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:56:36,520 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:36,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 43 [2022-11-02 20:56:36,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:56:36,535 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:56:36,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 42 [2022-11-02 20:56:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:36,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:41,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246621107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:41,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:41,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2022-11-02 20:56:41,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672247893] [2022-11-02 20:56:41,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:41,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:56:41,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:56:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=972, Unknown=4, NotChecked=0, Total=1122 [2022-11-02 20:56:41,392 INFO L87 Difference]: Start difference. First operand 699 states and 897 transitions. Second operand has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 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) [2022-11-02 20:56:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:43,997 INFO L93 Difference]: Finished difference Result 829 states and 1046 transitions. [2022-11-02 20:56:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-02 20:56:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 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 52 [2022-11-02 20:56:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:43,999 INFO L225 Difference]: With dead ends: 829 [2022-11-02 20:56:43,999 INFO L226 Difference]: Without dead ends: 829 [2022-11-02 20:56:44,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=491, Invalid=2473, Unknown=6, NotChecked=0, Total=2970 [2022-11-02 20:56:44,000 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 381 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:44,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 2436 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1016 Invalid, 0 Unknown, 410 Unchecked, 0.9s Time] [2022-11-02 20:56:44,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-11-02 20:56:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 759. [2022-11-02 20:56:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 691 states have (on average 1.341534008683068) internal successors, (927), 728 states have internal predecessors, (927), 15 states have call successors, (15), 8 states have call predecessors, (15), 16 states have return successors, (30), 22 states have call predecessors, (30), 15 states have call successors, (30) [2022-11-02 20:56:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 972 transitions. [2022-11-02 20:56:44,014 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 972 transitions. Word has length 52 [2022-11-02 20:56:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:44,014 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 972 transitions. [2022-11-02 20:56:44,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 23 states have internal predecessors, (100), 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) [2022-11-02 20:56:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 972 transitions. [2022-11-02 20:56:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:56:44,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:44,016 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, 1, 1, 1, 1] [2022-11-02 20:56:44,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:56:44,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:44,231 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:56:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash 945744204, now seen corresponding path program 1 times [2022-11-02 20:56:44,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:44,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122691927] [2022-11-02 20:56:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:44,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:45,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:56:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:45,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:45,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122691927] [2022-11-02 20:56:45,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122691927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:45,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363392804] [2022-11-02 20:56:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:45,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:56:45,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:56:45,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:56:45,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:56:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:45,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-02 20:56:45,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:56:45,685 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:56:45,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:46,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:46,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:46,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:46,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:46,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:46,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:56:46,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:46,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2022-11-02 20:56:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:46,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 18 [2022-11-02 20:56:46,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:46,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:56:46,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:56:46,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-11-02 20:56:46,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:56:46,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:56:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:46,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:56:59,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363392804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:56:59,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:56:59,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2022-11-02 20:56:59,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806023617] [2022-11-02 20:56:59,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:56:59,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:56:59,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:59,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:56:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=569, Unknown=18, NotChecked=0, Total=702 [2022-11-02 20:56:59,413 INFO L87 Difference]: Start difference. First operand 759 states and 972 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 19 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:57:01,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:01,586 INFO L93 Difference]: Finished difference Result 1156 states and 1439 transitions. [2022-11-02 20:57:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:57:01,591 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 19 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-11-02 20:57:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:01,594 INFO L225 Difference]: With dead ends: 1156 [2022-11-02 20:57:01,594 INFO L226 Difference]: Without dead ends: 1156 [2022-11-02 20:57:01,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=386, Invalid=1309, Unknown=27, NotChecked=0, Total=1722 [2022-11-02 20:57:01,596 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1489 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:01,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 2270 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1137 Invalid, 0 Unknown, 111 Unchecked, 1.0s Time] [2022-11-02 20:57:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-11-02 20:57:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 886. [2022-11-02 20:57:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 810 states have (on average 1.3358024691358024) internal successors, (1082), 848 states have internal predecessors, (1082), 19 states have call successors, (19), 10 states have call predecessors, (19), 20 states have return successors, (38), 27 states have call predecessors, (38), 19 states have call successors, (38) [2022-11-02 20:57:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1139 transitions. [2022-11-02 20:57:01,615 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1139 transitions. Word has length 52 [2022-11-02 20:57:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:01,616 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1139 transitions. [2022-11-02 20:57:01,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 19 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:57:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1139 transitions. [2022-11-02 20:57:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:57:01,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:01,617 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, 1, 1, 1, 1] [2022-11-02 20:57:01,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:01,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:01,843 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:01,843 INFO L85 PathProgramCache]: Analyzing trace with hash 947591245, now seen corresponding path program 1 times [2022-11-02 20:57:01,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:01,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764204676] [2022-11-02 20:57:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:01,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:03,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:03,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:03,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764204676] [2022-11-02 20:57:03,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764204676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:03,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969930127] [2022-11-02 20:57:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:03,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:03,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:03,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:03,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:57:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:03,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-02 20:57:03,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:03,401 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:57:03,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:03,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:03,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:03,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:03,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:03,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:03,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:03,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:03,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:03,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:03,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2022-11-02 20:57:03,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 20 [2022-11-02 20:57:04,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:57:04,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-02 20:57:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:04,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:57:04,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969930127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:04,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:57:04,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [17] total 29 [2022-11-02 20:57:04,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551136979] [2022-11-02 20:57:04,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:04,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:57:04,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:04,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:57:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:57:04,119 INFO L87 Difference]: Start difference. First operand 886 states and 1139 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 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) [2022-11-02 20:57:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:05,666 INFO L93 Difference]: Finished difference Result 1478 states and 1811 transitions. [2022-11-02 20:57:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:57:05,668 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 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 52 [2022-11-02 20:57:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:05,672 INFO L225 Difference]: With dead ends: 1478 [2022-11-02 20:57:05,672 INFO L226 Difference]: Without dead ends: 1478 [2022-11-02 20:57:05,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:57:05,673 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 1096 mSDsluCounter, 2068 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:05,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 2275 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:57:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-11-02 20:57:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 687. [2022-11-02 20:57:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 622 states have (on average 1.355305466237942) internal successors, (843), 658 states have internal predecessors, (843), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:57:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 885 transitions. [2022-11-02 20:57:05,693 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 885 transitions. Word has length 52 [2022-11-02 20:57:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:05,693 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 885 transitions. [2022-11-02 20:57:05,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 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) [2022-11-02 20:57:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 885 transitions. [2022-11-02 20:57:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:57:05,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:05,695 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, 1, 1, 1, 1, 1] [2022-11-02 20:57:05,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:05,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-02 20:57:05,911 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:05,911 INFO L85 PathProgramCache]: Analyzing trace with hash -689191823, now seen corresponding path program 1 times [2022-11-02 20:57:05,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:05,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722499239] [2022-11-02 20:57:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:05,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:07,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:07,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:07,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722499239] [2022-11-02 20:57:07,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722499239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:07,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:07,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-02 20:57:07,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640142053] [2022-11-02 20:57:07,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:07,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:57:07,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:07,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:57:07,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:57:07,076 INFO L87 Difference]: Start difference. First operand 687 states and 885 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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) [2022-11-02 20:57:10,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:10,271 INFO L93 Difference]: Finished difference Result 1902 states and 2440 transitions. [2022-11-02 20:57:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-02 20:57:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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 53 [2022-11-02 20:57:10,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:10,276 INFO L225 Difference]: With dead ends: 1902 [2022-11-02 20:57:10,276 INFO L226 Difference]: Without dead ends: 1902 [2022-11-02 20:57:10,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=534, Invalid=1818, Unknown=0, NotChecked=0, Total=2352 [2022-11-02 20:57:10,277 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 2809 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2815 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:10,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2815 Valid, 1544 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:57:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-11-02 20:57:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 696. [2022-11-02 20:57:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 631 states have (on average 1.358161648177496) internal successors, (857), 667 states have internal predecessors, (857), 14 states have call successors, (14), 7 states have call predecessors, (14), 14 states have return successors, (28), 21 states have call predecessors, (28), 14 states have call successors, (28) [2022-11-02 20:57:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 899 transitions. [2022-11-02 20:57:10,300 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 899 transitions. Word has length 53 [2022-11-02 20:57:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:10,300 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 899 transitions. [2022-11-02 20:57:10,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 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) [2022-11-02 20:57:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 899 transitions. [2022-11-02 20:57:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:57:10,301 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:10,301 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, 1, 1, 1, 1, 1] [2022-11-02 20:57:10,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-02 20:57:10,302 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:10,302 INFO L85 PathProgramCache]: Analyzing trace with hash -689191822, now seen corresponding path program 1 times [2022-11-02 20:57:10,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:10,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392608413] [2022-11-02 20:57:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:10,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:11,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:11,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:11,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392608413] [2022-11-02 20:57:11,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392608413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:11,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:11,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-02 20:57:11,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970635576] [2022-11-02 20:57:11,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:11,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:57:11,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:11,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:57:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:57:11,614 INFO L87 Difference]: Start difference. First operand 696 states and 899 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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) [2022-11-02 20:57:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:14,716 INFO L93 Difference]: Finished difference Result 1750 states and 2251 transitions. [2022-11-02 20:57:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:57:14,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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 53 [2022-11-02 20:57:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:14,721 INFO L225 Difference]: With dead ends: 1750 [2022-11-02 20:57:14,721 INFO L226 Difference]: Without dead ends: 1750 [2022-11-02 20:57:14,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=352, Invalid=1130, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:57:14,722 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 2970 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2972 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:14,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2972 Valid, 1258 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-02 20:57:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-11-02 20:57:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 854. [2022-11-02 20:57:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 773 states have (on average 1.3544631306597672) internal successors, (1047), 813 states have internal predecessors, (1047), 22 states have call successors, (22), 11 states have call predecessors, (22), 22 states have return successors, (44), 29 states have call predecessors, (44), 22 states have call successors, (44) [2022-11-02 20:57:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1113 transitions. [2022-11-02 20:57:14,749 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1113 transitions. Word has length 53 [2022-11-02 20:57:14,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:14,750 INFO L495 AbstractCegarLoop]: Abstraction has 854 states and 1113 transitions. [2022-11-02 20:57:14,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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) [2022-11-02 20:57:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1113 transitions. [2022-11-02 20:57:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:57:14,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:14,751 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, 1, 1, 1, 1, 1] [2022-11-02 20:57:14,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-02 20:57:14,751 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash -687344781, now seen corresponding path program 1 times [2022-11-02 20:57:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:14,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770236545] [2022-11-02 20:57:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:14,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:15,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:15,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:15,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770236545] [2022-11-02 20:57:15,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770236545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:15,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:15,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:57:15,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703896343] [2022-11-02 20:57:15,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:15,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:57:15,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:15,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:57:15,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:57:15,252 INFO L87 Difference]: Start difference. First operand 854 states and 1113 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 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) [2022-11-02 20:57:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:15,981 INFO L93 Difference]: Finished difference Result 1466 states and 1901 transitions. [2022-11-02 20:57:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:57:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 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 53 [2022-11-02 20:57:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:15,985 INFO L225 Difference]: With dead ends: 1466 [2022-11-02 20:57:15,985 INFO L226 Difference]: Without dead ends: 1466 [2022-11-02 20:57:15,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:57:15,986 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 1099 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:15,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1101 Valid, 1061 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:57:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-11-02 20:57:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 1066. [2022-11-02 20:57:16,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 961 states have (on average 1.3433922996878251) internal successors, (1291), 1007 states have internal predecessors, (1291), 34 states have call successors, (34), 17 states have call predecessors, (34), 34 states have return successors, (68), 41 states have call predecessors, (68), 34 states have call successors, (68) [2022-11-02 20:57:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1393 transitions. [2022-11-02 20:57:16,015 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1393 transitions. Word has length 53 [2022-11-02 20:57:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:16,015 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1393 transitions. [2022-11-02 20:57:16,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 12 states have internal predecessors, (51), 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) [2022-11-02 20:57:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1393 transitions. [2022-11-02 20:57:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:57:16,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:16,017 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, 1, 1, 1, 1, 1] [2022-11-02 20:57:16,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-02 20:57:16,017 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:16,018 INFO L85 PathProgramCache]: Analyzing trace with hash -687344780, now seen corresponding path program 1 times [2022-11-02 20:57:16,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:16,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232209875] [2022-11-02 20:57:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:16,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:16,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:16,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:16,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232209875] [2022-11-02 20:57:16,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232209875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:16,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:16,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:57:16,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477733894] [2022-11-02 20:57:16,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:16,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:57:16,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:16,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:57:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:57:16,832 INFO L87 Difference]: Start difference. First operand 1066 states and 1393 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 11 states have internal predecessors, (51), 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) [2022-11-02 20:57:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:17,720 INFO L93 Difference]: Finished difference Result 1424 states and 1852 transitions. [2022-11-02 20:57:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:57:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 11 states have internal predecessors, (51), 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 53 [2022-11-02 20:57:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:17,723 INFO L225 Difference]: With dead ends: 1424 [2022-11-02 20:57:17,724 INFO L226 Difference]: Without dead ends: 1424 [2022-11-02 20:57:17,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:57:17,724 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 928 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:17,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 873 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:57:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-11-02 20:57:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1148. [2022-11-02 20:57:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1035 states have (on average 1.3478260869565217) internal successors, (1395), 1083 states have internal predecessors, (1395), 38 states have call successors, (38), 19 states have call predecessors, (38), 38 states have return successors, (76), 45 states have call predecessors, (76), 38 states have call successors, (76) [2022-11-02 20:57:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1509 transitions. [2022-11-02 20:57:17,748 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1509 transitions. Word has length 53 [2022-11-02 20:57:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:17,748 INFO L495 AbstractCegarLoop]: Abstraction has 1148 states and 1509 transitions. [2022-11-02 20:57:17,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 11 states have internal predecessors, (51), 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) [2022-11-02 20:57:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1509 transitions. [2022-11-02 20:57:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:57:17,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:17,751 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, 1, 1, 1, 1, 1] [2022-11-02 20:57:17,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-11-02 20:57:17,752 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -887259092, now seen corresponding path program 1 times [2022-11-02 20:57:17,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:17,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888220451] [2022-11-02 20:57:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:17,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:18,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:18,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:18,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888220451] [2022-11-02 20:57:18,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888220451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:18,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136196118] [2022-11-02 20:57:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:18,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:18,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:18,728 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:18,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:57:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 20:57:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:19,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:19,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:19,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:19,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:57:19,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:19,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:57:19,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136196118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:19,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:57:19,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2022-11-02 20:57:19,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540674296] [2022-11-02 20:57:19,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:19,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:57:19,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:19,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:57:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:57:19,951 INFO L87 Difference]: Start difference. First operand 1148 states and 1509 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 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) [2022-11-02 20:57:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:21,020 INFO L93 Difference]: Finished difference Result 2882 states and 3799 transitions. [2022-11-02 20:57:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:57:21,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 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 53 [2022-11-02 20:57:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:21,036 INFO L225 Difference]: With dead ends: 2882 [2022-11-02 20:57:21,036 INFO L226 Difference]: Without dead ends: 2882 [2022-11-02 20:57:21,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:57:21,037 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 500 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 2244 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:21,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 2244 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 963 Invalid, 0 Unknown, 420 Unchecked, 0.7s Time] [2022-11-02 20:57:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2022-11-02 20:57:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2282. [2022-11-02 20:57:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2091 states have (on average 1.3553323768531802) internal successors, (2834), 2157 states have internal predecessors, (2834), 80 states have call successors, (80), 37 states have call predecessors, (80), 74 states have return successors, (160), 87 states have call predecessors, (160), 80 states have call successors, (160) [2022-11-02 20:57:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 3074 transitions. [2022-11-02 20:57:21,091 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 3074 transitions. Word has length 53 [2022-11-02 20:57:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:21,092 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 3074 transitions. [2022-11-02 20:57:21,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 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) [2022-11-02 20:57:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 3074 transitions. [2022-11-02 20:57:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:57:21,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:21,093 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, 1, 1, 1, 1, 1] [2022-11-02 20:57:21,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-02 20:57:21,315 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:21,315 INFO L85 PathProgramCache]: Analyzing trace with hash -887259091, now seen corresponding path program 1 times [2022-11-02 20:57:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:21,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973257351] [2022-11-02 20:57:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:21,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:23,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:23,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973257351] [2022-11-02 20:57:23,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973257351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:23,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993918955] [2022-11-02 20:57:23,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:23,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:23,095 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:23,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:57:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:23,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-02 20:57:23,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:23,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:24,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:24,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:24,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:24,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:24,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:57:24,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:24,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:57:24,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:24,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:57:24,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993918955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:24,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:57:24,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 26 [2022-11-02 20:57:24,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192128287] [2022-11-02 20:57:24,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:24,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:57:24,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:57:24,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:57:24,824 INFO L87 Difference]: Start difference. First operand 2282 states and 3074 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-11-02 20:57:26,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:26,322 INFO L93 Difference]: Finished difference Result 4573 states and 6254 transitions. [2022-11-02 20:57:26,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:57:26,323 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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 53 [2022-11-02 20:57:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:26,332 INFO L225 Difference]: With dead ends: 4573 [2022-11-02 20:57:26,332 INFO L226 Difference]: Without dead ends: 4573 [2022-11-02 20:57:26,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:57:26,333 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 707 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:26,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 1970 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 825 Invalid, 0 Unknown, 133 Unchecked, 0.8s Time] [2022-11-02 20:57:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4573 states. [2022-11-02 20:57:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4573 to 4002. [2022-11-02 20:57:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4002 states, 3749 states have (on average 1.3672979461189652) internal successors, (5126), 3808 states have internal predecessors, (5126), 122 states have call successors, (122), 47 states have call predecessors, (122), 94 states have return successors, (244), 146 states have call predecessors, (244), 122 states have call successors, (244) [2022-11-02 20:57:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4002 states to 4002 states and 5492 transitions. [2022-11-02 20:57:26,426 INFO L78 Accepts]: Start accepts. Automaton has 4002 states and 5492 transitions. Word has length 53 [2022-11-02 20:57:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:26,426 INFO L495 AbstractCegarLoop]: Abstraction has 4002 states and 5492 transitions. [2022-11-02 20:57:26,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-11-02 20:57:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4002 states and 5492 transitions. [2022-11-02 20:57:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:57:26,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:26,428 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, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:26,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:26,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-02 20:57:26,643 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:26,643 INFO L85 PathProgramCache]: Analyzing trace with hash 109888723, now seen corresponding path program 1 times [2022-11-02 20:57:26,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:26,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505875262] [2022-11-02 20:57:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:26,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:27,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:27,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505875262] [2022-11-02 20:57:27,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505875262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:27,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:27,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-02 20:57:27,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284804835] [2022-11-02 20:57:27,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:27,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:57:27,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:27,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:57:27,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:57:27,568 INFO L87 Difference]: Start difference. First operand 4002 states and 5492 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 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) [2022-11-02 20:57:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:29,595 INFO L93 Difference]: Finished difference Result 6521 states and 8983 transitions. [2022-11-02 20:57:29,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:57:29,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 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 54 [2022-11-02 20:57:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:29,608 INFO L225 Difference]: With dead ends: 6521 [2022-11-02 20:57:29,608 INFO L226 Difference]: Without dead ends: 6521 [2022-11-02 20:57:29,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:57:29,610 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1592 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:29,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1594 Valid, 2028 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:57:29,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6521 states. [2022-11-02 20:57:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6521 to 4009. [2022-11-02 20:57:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4009 states, 3756 states have (on average 1.3671458998935038) internal successors, (5135), 3815 states have internal predecessors, (5135), 122 states have call successors, (122), 47 states have call predecessors, (122), 94 states have return successors, (244), 146 states have call predecessors, (244), 122 states have call successors, (244) [2022-11-02 20:57:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4009 states to 4009 states and 5501 transitions. [2022-11-02 20:57:29,714 INFO L78 Accepts]: Start accepts. Automaton has 4009 states and 5501 transitions. Word has length 54 [2022-11-02 20:57:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:29,714 INFO L495 AbstractCegarLoop]: Abstraction has 4009 states and 5501 transitions. [2022-11-02 20:57:29,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 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) [2022-11-02 20:57:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4009 states and 5501 transitions. [2022-11-02 20:57:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:57:29,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:29,717 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, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:29,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-11-02 20:57:29,717 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:29,717 INFO L85 PathProgramCache]: Analyzing trace with hash 167147025, now seen corresponding path program 1 times [2022-11-02 20:57:29,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:29,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370581307] [2022-11-02 20:57:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:29,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:30,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370581307] [2022-11-02 20:57:30,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370581307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:30,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:30,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:57:30,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379188542] [2022-11-02 20:57:30,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:30,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:57:30,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:57:30,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:57:30,207 INFO L87 Difference]: Start difference. First operand 4009 states and 5501 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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) [2022-11-02 20:57:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:30,615 INFO L93 Difference]: Finished difference Result 4898 states and 6718 transitions. [2022-11-02 20:57:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:57:30,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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 54 [2022-11-02 20:57:30,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:30,622 INFO L225 Difference]: With dead ends: 4898 [2022-11-02 20:57:30,622 INFO L226 Difference]: Without dead ends: 4898 [2022-11-02 20:57:30,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:57:30,623 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 719 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:30,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 1126 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:57:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2022-11-02 20:57:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 4013. [2022-11-02 20:57:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4013 states, 3760 states have (on average 1.3672872340425533) internal successors, (5141), 3819 states have internal predecessors, (5141), 122 states have call successors, (122), 47 states have call predecessors, (122), 94 states have return successors, (244), 146 states have call predecessors, (244), 122 states have call successors, (244) [2022-11-02 20:57:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4013 states to 4013 states and 5507 transitions. [2022-11-02 20:57:30,698 INFO L78 Accepts]: Start accepts. Automaton has 4013 states and 5507 transitions. Word has length 54 [2022-11-02 20:57:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:30,699 INFO L495 AbstractCegarLoop]: Abstraction has 4013 states and 5507 transitions. [2022-11-02 20:57:30,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 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) [2022-11-02 20:57:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4013 states and 5507 transitions. [2022-11-02 20:57:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:57:30,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:30,700 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, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:30,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-11-02 20:57:30,700 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1735229320, now seen corresponding path program 1 times [2022-11-02 20:57:30,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:30,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31609134] [2022-11-02 20:57:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:30,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:31,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:31,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:31,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31609134] [2022-11-02 20:57:31,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31609134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:31,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:31,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-02 20:57:31,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189619879] [2022-11-02 20:57:31,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:31,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:57:31,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:57:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:57:31,347 INFO L87 Difference]: Start difference. First operand 4013 states and 5507 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 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) [2022-11-02 20:57:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:32,504 INFO L93 Difference]: Finished difference Result 6900 states and 9518 transitions. [2022-11-02 20:57:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:57:32,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 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 54 [2022-11-02 20:57:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:32,515 INFO L225 Difference]: With dead ends: 6900 [2022-11-02 20:57:32,516 INFO L226 Difference]: Without dead ends: 6900 [2022-11-02 20:57:32,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:57:32,516 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1000 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:32,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 2060 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:57:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6900 states. [2022-11-02 20:57:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6900 to 4274. [2022-11-02 20:57:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4274 states, 4001 states have (on average 1.3656585853536616) internal successors, (5464), 4060 states have internal predecessors, (5464), 134 states have call successors, (134), 51 states have call predecessors, (134), 102 states have return successors, (268), 162 states have call predecessors, (268), 134 states have call successors, (268) [2022-11-02 20:57:32,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 5866 transitions. [2022-11-02 20:57:32,664 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 5866 transitions. Word has length 54 [2022-11-02 20:57:32,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:32,664 INFO L495 AbstractCegarLoop]: Abstraction has 4274 states and 5866 transitions. [2022-11-02 20:57:32,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 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) [2022-11-02 20:57:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 5866 transitions. [2022-11-02 20:57:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:57:32,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:32,668 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:32,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-11-02 20:57:32,668 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1769661897, now seen corresponding path program 1 times [2022-11-02 20:57:32,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:32,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137066743] [2022-11-02 20:57:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:32,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:32,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:33,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:33,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:33,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137066743] [2022-11-02 20:57:33,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137066743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:33,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:33,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-02 20:57:33,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335504684] [2022-11-02 20:57:33,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:33,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:57:33,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:33,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:57:33,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:57:33,899 INFO L87 Difference]: Start difference. First operand 4274 states and 5866 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 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) [2022-11-02 20:57:37,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:37,241 INFO L93 Difference]: Finished difference Result 7743 states and 10624 transitions. [2022-11-02 20:57:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:57:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 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 56 [2022-11-02 20:57:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:37,258 INFO L225 Difference]: With dead ends: 7743 [2022-11-02 20:57:37,258 INFO L226 Difference]: Without dead ends: 7743 [2022-11-02 20:57:37,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=464, Invalid=1792, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:57:37,259 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 2055 mSDsluCounter, 2209 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2059 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:37,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2059 Valid, 2407 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:57:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7743 states. [2022-11-02 20:57:37,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7743 to 4903. [2022-11-02 20:57:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4566 states have (on average 1.3596145422689443) internal successors, (6208), 4641 states have internal predecessors, (6208), 166 states have call successors, (166), 67 states have call predecessors, (166), 134 states have return successors, (332), 194 states have call predecessors, (332), 166 states have call successors, (332) [2022-11-02 20:57:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 6706 transitions. [2022-11-02 20:57:37,371 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 6706 transitions. Word has length 56 [2022-11-02 20:57:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:37,371 INFO L495 AbstractCegarLoop]: Abstraction has 4903 states and 6706 transitions. [2022-11-02 20:57:37,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 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) [2022-11-02 20:57:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 6706 transitions. [2022-11-02 20:57:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:57:37,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:37,373 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:37,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-02 20:57:37,373 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1715958773, now seen corresponding path program 1 times [2022-11-02 20:57:37,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:37,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789272220] [2022-11-02 20:57:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:37,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:38,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:38,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:38,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789272220] [2022-11-02 20:57:38,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789272220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:38,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481043236] [2022-11-02 20:57:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:38,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:38,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:38,423 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:38,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:57:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:38,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:57:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:39,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:39,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:57:39,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:39,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:57:39,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481043236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:39,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:57:39,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 23 [2022-11-02 20:57:39,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406966742] [2022-11-02 20:57:39,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:39,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:57:39,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:57:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:57:39,457 INFO L87 Difference]: Start difference. First operand 4903 states and 6706 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 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) [2022-11-02 20:57:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:40,014 INFO L93 Difference]: Finished difference Result 9574 states and 13152 transitions. [2022-11-02 20:57:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:57:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 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 56 [2022-11-02 20:57:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:40,027 INFO L225 Difference]: With dead ends: 9574 [2022-11-02 20:57:40,027 INFO L226 Difference]: Without dead ends: 9574 [2022-11-02 20:57:40,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:57:40,028 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 875 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:40,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 1722 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 296 Invalid, 0 Unknown, 130 Unchecked, 0.3s Time] [2022-11-02 20:57:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9574 states. [2022-11-02 20:57:40,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9574 to 8741. [2022-11-02 20:57:40,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 8276 states have (on average 1.3662397293378443) internal successors, (11307), 8318 states have internal predecessors, (11307), 258 states have call successors, (258), 85 states have call predecessors, (258), 170 states have return successors, (516), 337 states have call predecessors, (516), 258 states have call successors, (516) [2022-11-02 20:57:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12081 transitions. [2022-11-02 20:57:40,197 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12081 transitions. Word has length 56 [2022-11-02 20:57:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:40,197 INFO L495 AbstractCegarLoop]: Abstraction has 8741 states and 12081 transitions. [2022-11-02 20:57:40,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 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) [2022-11-02 20:57:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12081 transitions. [2022-11-02 20:57:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-02 20:57:40,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:40,199 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:40,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:40,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-11-02 20:57:40,427 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:40,427 INFO L85 PathProgramCache]: Analyzing trace with hash -773838198, now seen corresponding path program 1 times [2022-11-02 20:57:40,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:40,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955748579] [2022-11-02 20:57:40,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:40,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:40,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:40,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:57:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:57:40,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:40,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955748579] [2022-11-02 20:57:40,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955748579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:40,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:40,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:57:40,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316839059] [2022-11-02 20:57:40,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:40,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:57:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:57:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:57:40,591 INFO L87 Difference]: Start difference. First operand 8741 states and 12081 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 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) [2022-11-02 20:57:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:40,718 INFO L93 Difference]: Finished difference Result 9446 states and 12958 transitions. [2022-11-02 20:57:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:57:40,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 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 57 [2022-11-02 20:57:40,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:40,733 INFO L225 Difference]: With dead ends: 9446 [2022-11-02 20:57:40,734 INFO L226 Difference]: Without dead ends: 9446 [2022-11-02 20:57:40,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:57:40,734 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 453 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:40,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 392 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:57:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9446 states. [2022-11-02 20:57:40,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9446 to 8740. [2022-11-02 20:57:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8740 states, 8276 states have (on average 1.3565732237796038) internal successors, (11227), 8317 states have internal predecessors, (11227), 258 states have call successors, (258), 85 states have call predecessors, (258), 170 states have return successors, (516), 337 states have call predecessors, (516), 258 states have call successors, (516) [2022-11-02 20:57:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8740 states to 8740 states and 12001 transitions. [2022-11-02 20:57:40,938 INFO L78 Accepts]: Start accepts. Automaton has 8740 states and 12001 transitions. Word has length 57 [2022-11-02 20:57:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:40,938 INFO L495 AbstractCegarLoop]: Abstraction has 8740 states and 12001 transitions. [2022-11-02 20:57:40,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 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) [2022-11-02 20:57:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 8740 states and 12001 transitions. [2022-11-02 20:57:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:57:40,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:40,940 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:40,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-11-02 20:57:40,941 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash -297261346, now seen corresponding path program 1 times [2022-11-02 20:57:40,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:40,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539534100] [2022-11-02 20:57:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:40,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:41,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:41,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:41,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539534100] [2022-11-02 20:57:41,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539534100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:41,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117338093] [2022-11-02 20:57:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:41,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:41,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:41,431 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:41,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:57:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:41,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-02 20:57:41,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:42,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:42,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:42,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:57:42,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117338093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:42,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:57:42,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2022-11-02 20:57:42,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243868382] [2022-11-02 20:57:42,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:42,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:57:42,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:42,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:57:42,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:57:42,222 INFO L87 Difference]: Start difference. First operand 8740 states and 12001 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 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) [2022-11-02 20:57:42,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:42,892 INFO L93 Difference]: Finished difference Result 10466 states and 14386 transitions. [2022-11-02 20:57:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:57:42,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 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 56 [2022-11-02 20:57:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:42,912 INFO L225 Difference]: With dead ends: 10466 [2022-11-02 20:57:42,912 INFO L226 Difference]: Without dead ends: 10466 [2022-11-02 20:57:42,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:57:42,913 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 1047 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:42,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1047 Valid, 765 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:57:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10466 states. [2022-11-02 20:57:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10466 to 8653. [2022-11-02 20:57:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8653 states, 8194 states have (on average 1.3563583109592385) internal successors, (11114), 8235 states have internal predecessors, (11114), 255 states have call successors, (255), 84 states have call predecessors, (255), 168 states have return successors, (510), 333 states have call predecessors, (510), 255 states have call successors, (510) [2022-11-02 20:57:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8653 states to 8653 states and 11879 transitions. [2022-11-02 20:57:43,110 INFO L78 Accepts]: Start accepts. Automaton has 8653 states and 11879 transitions. Word has length 56 [2022-11-02 20:57:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:43,110 INFO L495 AbstractCegarLoop]: Abstraction has 8653 states and 11879 transitions. [2022-11-02 20:57:43,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 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) [2022-11-02 20:57:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 8653 states and 11879 transitions. [2022-11-02 20:57:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:57:43,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:43,112 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:43,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:43,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-02 20:57:43,328 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:43,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:43,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1106607972, now seen corresponding path program 1 times [2022-11-02 20:57:43,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:43,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660114619] [2022-11-02 20:57:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:43,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:44,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:44,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660114619] [2022-11-02 20:57:44,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660114619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:44,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:44,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:57:44,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513745314] [2022-11-02 20:57:44,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:44,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:57:44,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:44,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:57:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:57:44,006 INFO L87 Difference]: Start difference. First operand 8653 states and 11879 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 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) [2022-11-02 20:57:45,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:45,215 INFO L93 Difference]: Finished difference Result 13681 states and 18861 transitions. [2022-11-02 20:57:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:57:45,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 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 56 [2022-11-02 20:57:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:45,240 INFO L225 Difference]: With dead ends: 13681 [2022-11-02 20:57:45,240 INFO L226 Difference]: Without dead ends: 13681 [2022-11-02 20:57:45,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:57:45,241 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 830 mSDsluCounter, 2052 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 2347 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:45,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 2347 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:57:45,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13681 states. [2022-11-02 20:57:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13681 to 9093. [2022-11-02 20:57:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9093 states, 8622 states have (on average 1.3588494548828578) internal successors, (11716), 8657 states have internal predecessors, (11716), 255 states have call successors, (255), 90 states have call predecessors, (255), 180 states have return successors, (510), 345 states have call predecessors, (510), 255 states have call successors, (510) [2022-11-02 20:57:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9093 states to 9093 states and 12481 transitions. [2022-11-02 20:57:45,435 INFO L78 Accepts]: Start accepts. Automaton has 9093 states and 12481 transitions. Word has length 56 [2022-11-02 20:57:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:45,435 INFO L495 AbstractCegarLoop]: Abstraction has 9093 states and 12481 transitions. [2022-11-02 20:57:45,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 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) [2022-11-02 20:57:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 9093 states and 12481 transitions. [2022-11-02 20:57:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:57:45,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:45,437 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:45,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-11-02 20:57:45,437 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:45,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1780819851, now seen corresponding path program 1 times [2022-11-02 20:57:45,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:45,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155195731] [2022-11-02 20:57:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:45,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:46,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:46,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:57:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:57:46,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:46,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155195731] [2022-11-02 20:57:46,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155195731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:46,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:46,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-02 20:57:46,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063852208] [2022-11-02 20:57:46,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:46,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:57:46,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:46,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:57:46,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:57:46,558 INFO L87 Difference]: Start difference. First operand 9093 states and 12481 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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) [2022-11-02 20:57:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:48,928 INFO L93 Difference]: Finished difference Result 17920 states and 25256 transitions. [2022-11-02 20:57:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:57:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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 58 [2022-11-02 20:57:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:48,977 INFO L225 Difference]: With dead ends: 17920 [2022-11-02 20:57:48,977 INFO L226 Difference]: Without dead ends: 17908 [2022-11-02 20:57:48,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:57:48,978 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 2070 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:48,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2070 Valid, 2592 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:57:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17908 states. [2022-11-02 20:57:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17908 to 8871. [2022-11-02 20:57:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8871 states, 8418 states have (on average 1.3548348776431456) internal successors, (11405), 8451 states have internal predecessors, (11405), 245 states have call successors, (245), 86 states have call predecessors, (245), 172 states have return successors, (490), 333 states have call predecessors, (490), 245 states have call successors, (490) [2022-11-02 20:57:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8871 states to 8871 states and 12140 transitions. [2022-11-02 20:57:49,181 INFO L78 Accepts]: Start accepts. Automaton has 8871 states and 12140 transitions. Word has length 58 [2022-11-02 20:57:49,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:49,182 INFO L495 AbstractCegarLoop]: Abstraction has 8871 states and 12140 transitions. [2022-11-02 20:57:49,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 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) [2022-11-02 20:57:49,182 INFO L276 IsEmpty]: Start isEmpty. Operand 8871 states and 12140 transitions. [2022-11-02 20:57:49,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:57:49,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:49,184 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:49,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-11-02 20:57:49,184 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash 765562808, now seen corresponding path program 1 times [2022-11-02 20:57:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:49,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587024564] [2022-11-02 20:57:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:49,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:50,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:50,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:57:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:57:50,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:50,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587024564] [2022-11-02 20:57:50,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587024564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:50,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280410141] [2022-11-02 20:57:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:50,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:50,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:50,987 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:50,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:57:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-02 20:57:51,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:51,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:51,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:51,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:51,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:51,959 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-02 20:57:51,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-02 20:57:52,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:52,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:57:52,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280410141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:52,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:57:52,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2022-11-02 20:57:52,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442844181] [2022-11-02 20:57:52,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:57:52,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:57:52,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:57:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:57:52,127 INFO L87 Difference]: Start difference. First operand 8871 states and 12140 transitions. Second operand has 26 states, 25 states have (on average 4.16) internal successors, (104), 23 states have internal predecessors, (104), 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) [2022-11-02 20:57:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:54,882 INFO L93 Difference]: Finished difference Result 13489 states and 18618 transitions. [2022-11-02 20:57:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:57:54,883 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.16) internal successors, (104), 23 states have internal predecessors, (104), 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 58 [2022-11-02 20:57:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:54,915 INFO L225 Difference]: With dead ends: 13489 [2022-11-02 20:57:54,915 INFO L226 Difference]: Without dead ends: 13489 [2022-11-02 20:57:54,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=670, Invalid=2870, Unknown=0, NotChecked=0, Total=3540 [2022-11-02 20:57:54,917 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 3110 mSDsluCounter, 2457 mSDsCounter, 0 mSdLazyCounter, 1717 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3111 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:54,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3111 Valid, 2615 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1717 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:57:54,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13489 states. [2022-11-02 20:57:55,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13489 to 9117. [2022-11-02 20:57:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9117 states, 8610 states have (on average 1.3545876887340302) internal successors, (11663), 8667 states have internal predecessors, (11663), 263 states have call successors, (263), 104 states have call predecessors, (263), 208 states have return successors, (526), 345 states have call predecessors, (526), 263 states have call successors, (526) [2022-11-02 20:57:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9117 states to 9117 states and 12452 transitions. [2022-11-02 20:57:55,110 INFO L78 Accepts]: Start accepts. Automaton has 9117 states and 12452 transitions. Word has length 58 [2022-11-02 20:57:55,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:55,110 INFO L495 AbstractCegarLoop]: Abstraction has 9117 states and 12452 transitions. [2022-11-02 20:57:55,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.16) internal successors, (104), 23 states have internal predecessors, (104), 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) [2022-11-02 20:57:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 9117 states and 12452 transitions. [2022-11-02 20:57:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:57:55,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:55,113 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:57:55,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:57:55,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-02 20:57:55,327 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:57:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:55,327 INFO L85 PathProgramCache]: Analyzing trace with hash 765562809, now seen corresponding path program 1 times [2022-11-02 20:57:55,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:55,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513560054] [2022-11-02 20:57:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:55,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:55,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:56,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:57:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:56,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:57:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:57:56,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:56,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513560054] [2022-11-02 20:57:56,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513560054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:57:56,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812851417] [2022-11-02 20:57:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:56,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:57:56,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:57:56,944 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:57:56,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:57:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-02 20:57:57,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:57:57,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:57,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:57,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:57,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:58,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:58,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 33 [2022-11-02 20:57:58,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:58,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:58,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:57:58,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:57:58,371 INFO L356 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-02 20:57:58,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 19 [2022-11-02 20:57:58,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:57:58,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:58,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:57:58,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:57:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:58,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:03,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812851417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:03,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:58:03,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 31 [2022-11-02 20:58:03,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384609536] [2022-11-02 20:58:03,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:03,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:58:03,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:03,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:58:03,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1278, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:58:03,341 INFO L87 Difference]: Start difference. First operand 9117 states and 12452 transitions. Second operand has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 28 states have internal predecessors, (105), 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) [2022-11-02 20:58:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:09,151 INFO L93 Difference]: Finished difference Result 17444 states and 23713 transitions. [2022-11-02 20:58:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-02 20:58:09,152 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 28 states have internal predecessors, (105), 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 58 [2022-11-02 20:58:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:09,187 INFO L225 Difference]: With dead ends: 17444 [2022-11-02 20:58:09,187 INFO L226 Difference]: Without dead ends: 17444 [2022-11-02 20:58:09,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=890, Invalid=4962, Unknown=0, NotChecked=0, Total=5852 [2022-11-02 20:58:09,188 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 4480 mSDsluCounter, 3644 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4480 SdHoareTripleChecker+Valid, 3813 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:09,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4480 Valid, 3813 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 2402 Invalid, 0 Unknown, 322 Unchecked, 2.1s Time] [2022-11-02 20:58:09,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17444 states. [2022-11-02 20:58:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17444 to 14520. [2022-11-02 20:58:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14520 states, 13640 states have (on average 1.3381964809384164) internal successors, (18253), 13718 states have internal predecessors, (18253), 468 states have call successors, (468), 188 states have call predecessors, (468), 376 states have return successors, (936), 613 states have call predecessors, (936), 468 states have call successors, (936) [2022-11-02 20:58:09,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14520 states to 14520 states and 19657 transitions. [2022-11-02 20:58:09,543 INFO L78 Accepts]: Start accepts. Automaton has 14520 states and 19657 transitions. Word has length 58 [2022-11-02 20:58:09,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:09,543 INFO L495 AbstractCegarLoop]: Abstraction has 14520 states and 19657 transitions. [2022-11-02 20:58:09,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 28 states have internal predecessors, (105), 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) [2022-11-02 20:58:09,544 INFO L276 IsEmpty]: Start isEmpty. Operand 14520 states and 19657 transitions. [2022-11-02 20:58:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-02 20:58:09,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:09,546 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:09,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:09,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-02 20:58:09,770 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:58:09,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:09,771 INFO L85 PathProgramCache]: Analyzing trace with hash -581458318, now seen corresponding path program 1 times [2022-11-02 20:58:09,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:09,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006558723] [2022-11-02 20:58:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:10,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:58:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:10,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:58:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:58:10,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:10,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006558723] [2022-11-02 20:58:10,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006558723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:10,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:10,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-02 20:58:10,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250517052] [2022-11-02 20:58:10,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:10,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:58:10,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:10,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:58:10,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:58:10,724 INFO L87 Difference]: Start difference. First operand 14520 states and 19657 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 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) [2022-11-02 20:58:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:12,953 INFO L93 Difference]: Finished difference Result 26995 states and 37669 transitions. [2022-11-02 20:58:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:58:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 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 58 [2022-11-02 20:58:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:13,007 INFO L225 Difference]: With dead ends: 26995 [2022-11-02 20:58:13,008 INFO L226 Difference]: Without dead ends: 26963 [2022-11-02 20:58:13,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:58:13,009 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 1708 mSDsluCounter, 2034 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:13,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1708 Valid, 2264 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:58:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26963 states. [2022-11-02 20:58:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26963 to 13894. [2022-11-02 20:58:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13894 states, 13060 states have (on average 1.329938744257274) internal successors, (17369), 13138 states have internal predecessors, (17369), 442 states have call successors, (442), 178 states have call predecessors, (442), 356 states have return successors, (884), 577 states have call predecessors, (884), 442 states have call successors, (884) [2022-11-02 20:58:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13894 states to 13894 states and 18695 transitions. [2022-11-02 20:58:13,405 INFO L78 Accepts]: Start accepts. Automaton has 13894 states and 18695 transitions. Word has length 58 [2022-11-02 20:58:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:13,405 INFO L495 AbstractCegarLoop]: Abstraction has 13894 states and 18695 transitions. [2022-11-02 20:58:13,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 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) [2022-11-02 20:58:13,405 INFO L276 IsEmpty]: Start isEmpty. Operand 13894 states and 18695 transitions. [2022-11-02 20:58:13,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:58:13,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:13,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:13,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-11-02 20:58:13,408 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:58:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1541651178, now seen corresponding path program 1 times [2022-11-02 20:58:13,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:13,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797938257] [2022-11-02 20:58:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:13,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:58:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:14,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:58:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:58:14,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:14,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797938257] [2022-11-02 20:58:14,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797938257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:14,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322583686] [2022-11-02 20:58:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:14,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:14,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:14,178 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:14,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:58:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-02 20:58:14,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:14,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:15,110 INFO L356 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2022-11-02 20:58:15,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2022-11-02 20:58:15,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:58:15,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:15,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:15,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322583686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:15,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:58:15,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2022-11-02 20:58:15,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545394542] [2022-11-02 20:58:15,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:15,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:58:15,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:15,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:58:15,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:58:15,409 INFO L87 Difference]: Start difference. First operand 13894 states and 18695 transitions. Second operand has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:58:16,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:16,733 INFO L93 Difference]: Finished difference Result 25053 states and 33806 transitions. [2022-11-02 20:58:16,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:58:16,734 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2022-11-02 20:58:16,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:16,771 INFO L225 Difference]: With dead ends: 25053 [2022-11-02 20:58:16,771 INFO L226 Difference]: Without dead ends: 25053 [2022-11-02 20:58:16,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:58:16,772 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 1010 mSDsluCounter, 1965 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:16,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1010 Valid, 2179 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 832 Invalid, 0 Unknown, 240 Unchecked, 0.7s Time] [2022-11-02 20:58:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25053 states. [2022-11-02 20:58:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25053 to 23724. [2022-11-02 20:58:17,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23724 states, 22127 states have (on average 1.3364215664120758) internal successors, (29571), 22415 states have internal predecessors, (29571), 807 states have call successors, (807), 377 states have call predecessors, (807), 754 states have return successors, (1614), 931 states have call predecessors, (1614), 807 states have call successors, (1614) [2022-11-02 20:58:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23724 states to 23724 states and 31992 transitions. [2022-11-02 20:58:17,371 INFO L78 Accepts]: Start accepts. Automaton has 23724 states and 31992 transitions. Word has length 59 [2022-11-02 20:58:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:17,372 INFO L495 AbstractCegarLoop]: Abstraction has 23724 states and 31992 transitions. [2022-11-02 20:58:17,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:58:17,372 INFO L276 IsEmpty]: Start isEmpty. Operand 23724 states and 31992 transitions. [2022-11-02 20:58:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:58:17,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:17,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:17,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:17,574 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:58:17,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1541651179, now seen corresponding path program 1 times [2022-11-02 20:58:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:17,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867832893] [2022-11-02 20:58:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:17,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:19,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:58:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:19,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:58:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:58:19,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:19,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867832893] [2022-11-02 20:58:19,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867832893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:19,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079332673] [2022-11-02 20:58:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:19,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:19,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:19,136 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:19,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:58:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:19,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-02 20:58:19,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:19,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:19,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:20,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:20,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:20,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:20,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:58:20,828 INFO L356 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-02 20:58:20,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 19 [2022-11-02 20:58:21,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:58:21,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:21,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:58:21,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 14 [2022-11-02 20:58:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:21,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:25,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079332673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:25,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:58:25,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-11-02 20:58:25,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772561436] [2022-11-02 20:58:25,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:25,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:58:25,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:25,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:58:25,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:58:25,732 INFO L87 Difference]: Start difference. First operand 23724 states and 31992 transitions. Second operand has 27 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 25 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:58:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:28,661 INFO L93 Difference]: Finished difference Result 25287 states and 34196 transitions. [2022-11-02 20:58:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:58:28,662 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 25 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2022-11-02 20:58:28,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:28,709 INFO L225 Difference]: With dead ends: 25287 [2022-11-02 20:58:28,709 INFO L226 Difference]: Without dead ends: 25287 [2022-11-02 20:58:28,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:58:28,710 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1601 mSDsluCounter, 2787 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1601 SdHoareTripleChecker+Valid, 2985 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 831 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:28,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1601 Valid, 2985 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1311 Invalid, 0 Unknown, 831 Unchecked, 1.2s Time] [2022-11-02 20:58:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25287 states. [2022-11-02 20:58:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25287 to 23724. [2022-11-02 20:58:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23724 states, 22127 states have (on average 1.3356080806254802) internal successors, (29553), 22415 states have internal predecessors, (29553), 807 states have call successors, (807), 377 states have call predecessors, (807), 754 states have return successors, (1614), 931 states have call predecessors, (1614), 807 states have call successors, (1614) [2022-11-02 20:58:29,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23724 states to 23724 states and 31974 transitions. [2022-11-02 20:58:29,043 INFO L78 Accepts]: Start accepts. Automaton has 23724 states and 31974 transitions. Word has length 59 [2022-11-02 20:58:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:29,044 INFO L495 AbstractCegarLoop]: Abstraction has 23724 states and 31974 transitions. [2022-11-02 20:58:29,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 25 states have internal predecessors, (109), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 20:58:29,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23724 states and 31974 transitions. [2022-11-02 20:58:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:58:29,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:29,046 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:29,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:29,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:29,259 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:58:29,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1325471971, now seen corresponding path program 1 times [2022-11-02 20:58:29,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:29,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211326395] [2022-11-02 20:58:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:30,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:58:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:30,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:58:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:58:30,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:30,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211326395] [2022-11-02 20:58:30,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211326395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:30,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580819121] [2022-11-02 20:58:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:30,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:30,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:30,692 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:30,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:58:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:30,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-02 20:58:30,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:30,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:31,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:31,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:31,776 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-02 20:58:31,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-02 20:58:31,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:31,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:31,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580819121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:31,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:58:31,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2022-11-02 20:58:31,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426557389] [2022-11-02 20:58:31,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:31,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:58:31,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:58:31,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-11-02 20:58:31,961 INFO L87 Difference]: Start difference. First operand 23724 states and 31974 transitions. Second operand has 24 states, 23 states have (on average 4.608695652173913) internal successors, (106), 20 states have internal predecessors, (106), 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) [2022-11-02 20:58:33,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:33,893 INFO L93 Difference]: Finished difference Result 33171 states and 45315 transitions. [2022-11-02 20:58:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:58:33,901 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.608695652173913) internal successors, (106), 20 states have internal predecessors, (106), 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 59 [2022-11-02 20:58:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:33,947 INFO L225 Difference]: With dead ends: 33171 [2022-11-02 20:58:33,947 INFO L226 Difference]: Without dead ends: 33171 [2022-11-02 20:58:33,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=309, Invalid=1173, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:58:33,948 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 1636 mSDsluCounter, 2193 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1636 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:33,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1636 Valid, 2492 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-02 20:58:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33171 states. [2022-11-02 20:58:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33171 to 25703. [2022-11-02 20:58:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25703 states, 23843 states have (on average 1.3349830138824812) internal successors, (31830), 24189 states have internal predecessors, (31830), 912 states have call successors, (912), 456 states have call predecessors, (912), 912 states have return successors, (1824), 1057 states have call predecessors, (1824), 912 states have call successors, (1824) [2022-11-02 20:58:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25703 states to 25703 states and 34566 transitions. [2022-11-02 20:58:34,368 INFO L78 Accepts]: Start accepts. Automaton has 25703 states and 34566 transitions. Word has length 59 [2022-11-02 20:58:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:34,369 INFO L495 AbstractCegarLoop]: Abstraction has 25703 states and 34566 transitions. [2022-11-02 20:58:34,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.608695652173913) internal successors, (106), 20 states have internal predecessors, (106), 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) [2022-11-02 20:58:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 25703 states and 34566 transitions. [2022-11-02 20:58:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:58:34,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:34,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:34,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:34,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-11-02 20:58:34,575 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:58:34,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:34,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1325471972, now seen corresponding path program 1 times [2022-11-02 20:58:34,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:34,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079542864] [2022-11-02 20:58:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:34,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:36,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:58:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 20:58:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:58:36,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079542864] [2022-11-02 20:58:36,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079542864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:36,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225327915] [2022-11-02 20:58:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:36,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:36,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:36,088 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:36,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:58:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:36,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-02 20:58:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:36,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:36,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:37,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:37,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:37,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:37,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 33 [2022-11-02 20:58:37,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:37,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:37,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-02 20:58:37,513 INFO L356 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-11-02 20:58:37,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-02 20:58:37,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:37,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:37,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:42,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225327915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:42,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:58:42,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 26 [2022-11-02 20:58:42,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243547949] [2022-11-02 20:58:42,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:58:42,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:58:42,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:42,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:58:42,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:58:42,147 INFO L87 Difference]: Start difference. First operand 25703 states and 34566 transitions. Second operand has 27 states, 26 states have (on average 4.115384615384615) internal successors, (107), 23 states have internal predecessors, (107), 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) [2022-11-02 20:58:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:46,743 INFO L93 Difference]: Finished difference Result 37635 states and 51778 transitions. [2022-11-02 20:58:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-02 20:58:46,744 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.115384615384615) internal successors, (107), 23 states have internal predecessors, (107), 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 59 [2022-11-02 20:58:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:46,796 INFO L225 Difference]: With dead ends: 37635 [2022-11-02 20:58:46,796 INFO L226 Difference]: Without dead ends: 37635 [2022-11-02 20:58:46,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=531, Invalid=2439, Unknown=0, NotChecked=0, Total=2970 [2022-11-02 20:58:46,797 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 2961 mSDsluCounter, 3261 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2961 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 2686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:46,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2961 Valid, 3559 Invalid, 2686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-02 20:58:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37635 states. [2022-11-02 20:58:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37635 to 25539. [2022-11-02 20:58:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25539 states, 23715 states have (on average 1.3351886991355681) internal successors, (31664), 24045 states have internal predecessors, (31664), 900 states have call successors, (900), 444 states have call predecessors, (900), 888 states have return successors, (1800), 1049 states have call predecessors, (1800), 900 states have call successors, (1800) [2022-11-02 20:58:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25539 states to 25539 states and 34364 transitions. [2022-11-02 20:58:47,233 INFO L78 Accepts]: Start accepts. Automaton has 25539 states and 34364 transitions. Word has length 59 [2022-11-02 20:58:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:47,233 INFO L495 AbstractCegarLoop]: Abstraction has 25539 states and 34364 transitions. [2022-11-02 20:58:47,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.115384615384615) internal successors, (107), 23 states have internal predecessors, (107), 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) [2022-11-02 20:58:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 25539 states and 34364 transitions. [2022-11-02 20:58:47,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-02 20:58:47,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:47,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:58:47,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:58:47,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-11-02 20:58:47,436 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-02 20:58:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:47,437 INFO L85 PathProgramCache]: Analyzing trace with hash 726312246, now seen corresponding path program 1 times [2022-11-02 20:58:47,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:47,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912396109] [2022-11-02 20:58:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:47,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:58:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:50,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:58:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:50,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:50,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912396109] [2022-11-02 20:58:50,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912396109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:58:50,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917671398] [2022-11-02 20:58:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:50,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:58:50,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:58:50,667 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:58:50,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d8280a2e-ecbf-4361-98f4-eaa453790588/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:58:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-02 20:58:50,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:58:50,951 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:58:50,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:51,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:51,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:51,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:51,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:51,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:51,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:51,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:51,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:51,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:58:51,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:51,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-11-02 20:58:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:51,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-11-02 20:58:52,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:58:52,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 26 [2022-11-02 20:58:52,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:52,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:58:52,465 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-02 20:58:52,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 51 [2022-11-02 20:58:52,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 26 [2022-11-02 20:58:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:58:53,000 INFO L356 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-11-02 20:58:53,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 85 treesize of output 42 [2022-11-02 20:58:53,009 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:58:53,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2022-11-02 20:58:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:53,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:58:53,480 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse3 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse1 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4)))) (and (forall ((v_ArrVal_1915 Int)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse2 .cse3 v_ArrVal_1915)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) .cse1))) 4) 0)) (forall ((v_ArrVal_1915 Int) (v_ArrVal_1914 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1914) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse2 .cse3 v_ArrVal_1915)) |c_~#list~0.base|) .cse1)) 4) 0)))) is different from false [2022-11-02 20:58:55,213 INFO L356 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2022-11-02 20:58:55,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 127 [2022-11-02 20:58:55,263 INFO L356 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2022-11-02 20:58:55,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 103 [2022-11-02 20:58:55,294 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:58:55,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 482 treesize of output 488 [2022-11-02 20:58:55,552 INFO L356 Elim1Store]: treesize reduction 138, result has 68.7 percent of original size [2022-11-02 20:58:55,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1872 treesize of output 1954 [2022-11-02 20:58:55,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1622 treesize of output 1574 [2022-11-02 20:58:55,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1574 treesize of output 1550 [2022-11-02 20:58:55,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3714 treesize of output 3396 [2022-11-02 20:58:56,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4