./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0 --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:03:24,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:03:24,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:03:24,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:03:24,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:03:24,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:03:24,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:03:24,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:03:24,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:03:24,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:03:24,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:03:24,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:03:24,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:03:24,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:03:24,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:03:24,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:03:24,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:03:24,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:03:24,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:03:24,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:03:24,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:03:24,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:03:24,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:03:24,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:03:24,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:03:24,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:03:24,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:03:24,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:03:24,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:03:24,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:03:24,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:03:24,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:03:24,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:03:24,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:03:24,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:03:24,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:03:24,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:03:24,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:03:24,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:03:24,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:03:24,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:03:24,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-22 16:03:24,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:03:24,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:03:24,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:03:24,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:03:24,986 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:03:24,986 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:03:24,986 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:03:24,987 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:03:24,987 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:03:24,987 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:03:24,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:03:24,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:03:24,988 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:03:24,988 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 16:03:24,988 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 16:03:24,989 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 16:03:24,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:03:24,989 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:03:24,989 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:03:24,989 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:03:24,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:03:24,990 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:03:24,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:03:24,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:03:24,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:03:24,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:03:24,991 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:03:24,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:03:24,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:03:24,992 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_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-11-22 16:03:25,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:03:25,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:03:25,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:03:25,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:03:25,286 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:03:25,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-22 16:03:25,353 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data/69d4da1cf/8093e94d46b249d489b45bf092886234/FLAGd40844272 [2021-11-22 16:03:25,948 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:03:25,949 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-22 16:03:25,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data/69d4da1cf/8093e94d46b249d489b45bf092886234/FLAGd40844272 [2021-11-22 16:03:26,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data/69d4da1cf/8093e94d46b249d489b45bf092886234 [2021-11-22 16:03:26,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:03:26,217 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:03:26,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:03:26,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:03:26,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:03:26,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b19144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26, skipping insertion in model container [2021-11-22 16:03:26,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:03:26,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:03:26,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:03:26,657 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:03:26,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:03:26,737 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:03:26,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26 WrapperNode [2021-11-22 16:03:26,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:03:26,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:03:26,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:03:26,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:03:26,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,794 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 8, calls inlined = 14, statements flattened = 205 [2021-11-22 16:03:26,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:03:26,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:03:26,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:03:26,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:03:26,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:03:26,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:03:26,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:03:26,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:03:26,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (1/1) ... [2021-11-22 16:03:26,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:03:26,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:26,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:03:26,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:03:26,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 16:03:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 16:03:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:03:26,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 16:03:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:03:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-22 16:03:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:03:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:03:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:03:27,114 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:03:27,115 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:03:27,623 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:03:27,638 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:03:27,638 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 16:03:27,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:03:27 BoogieIcfgContainer [2021-11-22 16:03:27,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:03:27,644 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:03:27,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:03:27,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:03:27,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:03:26" (1/3) ... [2021-11-22 16:03:27,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d028750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:03:27, skipping insertion in model container [2021-11-22 16:03:27,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:26" (2/3) ... [2021-11-22 16:03:27,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d028750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:03:27, skipping insertion in model container [2021-11-22 16:03:27,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:03:27" (3/3) ... [2021-11-22 16:03:27,652 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-11-22 16:03:27,664 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:03:27,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2021-11-22 16:03:27,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:03:27,734 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 16:03:27,734 INFO L340 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2021-11-22 16:03:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 94 states have (on average 1.872340425531915) internal successors, (176), 152 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-22 16:03:27,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:27,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-22 16:03:27,761 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-11-22 16:03:27,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:27,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876515223] [2021-11-22 16:03:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:27,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:27,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:27,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876515223] [2021-11-22 16:03:27,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876515223] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:27,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:27,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-22 16:03:27,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821803254] [2021-11-22 16:03:27,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:27,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:27,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:28,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:28,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:28,026 INFO L87 Difference]: Start difference. First operand has 153 states, 94 states have (on average 1.872340425531915) internal successors, (176), 152 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:28,212 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2021-11-22 16:03:28,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:28,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-22 16:03:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:28,226 INFO L225 Difference]: With dead ends: 239 [2021-11-22 16:03:28,226 INFO L226 Difference]: Without dead ends: 235 [2021-11-22 16:03:28,228 INFO L932 BasicCegarLoop]: 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 [2021-11-22 16:03:28,232 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 134 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:28,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 204 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-22 16:03:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 185. [2021-11-22 16:03:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 130 states have (on average 1.7615384615384615) internal successors, (229), 184 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 229 transitions. [2021-11-22 16:03:28,285 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 229 transitions. Word has length 4 [2021-11-22 16:03:28,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:28,286 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 229 transitions. [2021-11-22 16:03:28,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 229 transitions. [2021-11-22 16:03:28,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-22 16:03:28,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:28,287 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-22 16:03:28,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:03:28,288 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:28,289 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-11-22 16:03:28,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:28,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945846547] [2021-11-22 16:03:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:28,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:28,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:28,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945846547] [2021-11-22 16:03:28,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945846547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:28,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:28,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:28,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126785135] [2021-11-22 16:03:28,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:28,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:28,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:28,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:28,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:28,419 INFO L87 Difference]: Start difference. First operand 185 states and 229 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:28,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:28,673 INFO L93 Difference]: Finished difference Result 435 states and 535 transitions. [2021-11-22 16:03:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:28,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2021-11-22 16:03:28,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:28,680 INFO L225 Difference]: With dead ends: 435 [2021-11-22 16:03:28,680 INFO L226 Difference]: Without dead ends: 435 [2021-11-22 16:03:28,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:28,687 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 236 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:28,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 451 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:03:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-22 16:03:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 279. [2021-11-22 16:03:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 224 states have (on average 1.75) internal successors, (392), 278 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 392 transitions. [2021-11-22 16:03:28,734 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 392 transitions. Word has length 4 [2021-11-22 16:03:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:28,736 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 392 transitions. [2021-11-22 16:03:28,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 392 transitions. [2021-11-22 16:03:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-22 16:03:28,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:28,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-22 16:03:28,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 16:03:28,739 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:28,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 28698698, now seen corresponding path program 1 times [2021-11-22 16:03:28,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:28,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87082324] [2021-11-22 16:03:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:28,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:28,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:28,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87082324] [2021-11-22 16:03:28,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87082324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:28,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:28,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:28,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937357333] [2021-11-22 16:03:28,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:28,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:28,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:28,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:28,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:28,999 INFO L87 Difference]: Start difference. First operand 279 states and 392 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:29,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:29,349 INFO L93 Difference]: Finished difference Result 450 states and 569 transitions. [2021-11-22 16:03:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:03:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-22 16:03:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:29,354 INFO L225 Difference]: With dead ends: 450 [2021-11-22 16:03:29,354 INFO L226 Difference]: Without dead ends: 450 [2021-11-22 16:03:29,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:29,359 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 272 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:29,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 430 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:03:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-11-22 16:03:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 285. [2021-11-22 16:03:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 230 states have (on average 1.7260869565217392) internal successors, (397), 284 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 397 transitions. [2021-11-22 16:03:29,396 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 397 transitions. Word has length 5 [2021-11-22 16:03:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:29,396 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 397 transitions. [2021-11-22 16:03:29,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 397 transitions. [2021-11-22 16:03:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 16:03:29,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:29,398 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 16:03:29,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 16:03:29,399 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:29,400 INFO L85 PathProgramCache]: Analyzing trace with hash 889659685, now seen corresponding path program 1 times [2021-11-22 16:03:29,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:29,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231108482] [2021-11-22 16:03:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:29,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:29,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231108482] [2021-11-22 16:03:29,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231108482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:29,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:29,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:29,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405658659] [2021-11-22 16:03:29,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:29,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:29,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:29,613 INFO L87 Difference]: Start difference. First operand 285 states and 397 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-11-22 16:03:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:29,891 INFO L93 Difference]: Finished difference Result 437 states and 535 transitions. [2021-11-22 16:03:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:03:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2021-11-22 16:03:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:29,893 INFO L225 Difference]: With dead ends: 437 [2021-11-22 16:03:29,893 INFO L226 Difference]: Without dead ends: 437 [2021-11-22 16:03:29,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:29,894 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 251 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:29,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 535 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:03:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-22 16:03:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 285. [2021-11-22 16:03:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 230 states have (on average 1.7043478260869565) internal successors, (392), 284 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 392 transitions. [2021-11-22 16:03:29,920 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 392 transitions. Word has length 6 [2021-11-22 16:03:29,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:29,921 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 392 transitions. [2021-11-22 16:03:29,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2021-11-22 16:03:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 392 transitions. [2021-11-22 16:03:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 16:03:29,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:29,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:29,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 16:03:29,922 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:29,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646508, now seen corresponding path program 1 times [2021-11-22 16:03:29,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:29,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149090498] [2021-11-22 16:03:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:29,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:29,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:29,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149090498] [2021-11-22 16:03:29,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149090498] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:29,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:29,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:29,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246369056] [2021-11-22 16:03:29,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:29,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:29,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:29,990 INFO L87 Difference]: Start difference. First operand 285 states and 392 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) [2021-11-22 16:03:30,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:30,140 INFO L93 Difference]: Finished difference Result 337 states and 435 transitions. [2021-11-22 16:03:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:30,140 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 [2021-11-22 16:03:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:30,143 INFO L225 Difference]: With dead ends: 337 [2021-11-22 16:03:30,143 INFO L226 Difference]: Without dead ends: 337 [2021-11-22 16:03:30,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:30,147 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 171 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:30,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 288 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:30,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-22 16:03:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 284. [2021-11-22 16:03:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 230 states have (on average 1.6956521739130435) internal successors, (390), 283 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 390 transitions. [2021-11-22 16:03:30,168 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 390 transitions. Word has length 7 [2021-11-22 16:03:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:30,168 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 390 transitions. [2021-11-22 16:03:30,168 INFO L471 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) [2021-11-22 16:03:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 390 transitions. [2021-11-22 16:03:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 16:03:30,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:30,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:30,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 16:03:30,175 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash 264466951, now seen corresponding path program 1 times [2021-11-22 16:03:30,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:30,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059078299] [2021-11-22 16:03:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:30,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:30,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:30,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059078299] [2021-11-22 16:03:30,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059078299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:30,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:30,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:30,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92519722] [2021-11-22 16:03:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:30,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:30,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:30,248 INFO L87 Difference]: Start difference. First operand 284 states and 390 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:30,476 INFO L93 Difference]: Finished difference Result 351 states and 454 transitions. [2021-11-22 16:03:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:30,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-22 16:03:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:30,479 INFO L225 Difference]: With dead ends: 351 [2021-11-22 16:03:30,479 INFO L226 Difference]: Without dead ends: 351 [2021-11-22 16:03:30,480 INFO L932 BasicCegarLoop]: 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 [2021-11-22 16:03:30,481 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 158 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:30,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 367 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:03:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-22 16:03:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 283. [2021-11-22 16:03:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 230 states have (on average 1.6869565217391305) internal successors, (388), 282 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 388 transitions. [2021-11-22 16:03:30,489 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 388 transitions. Word has length 8 [2021-11-22 16:03:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:30,490 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 388 transitions. [2021-11-22 16:03:30,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 388 transitions. [2021-11-22 16:03:30,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-22 16:03:30,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:30,491 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:30,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 16:03:30,492 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:30,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1118627475, now seen corresponding path program 1 times [2021-11-22 16:03:30,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:30,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95283202] [2021-11-22 16:03:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:30,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:30,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95283202] [2021-11-22 16:03:30,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95283202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:30,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47698261] [2021-11-22 16:03:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:30,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:30,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:30,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:30,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:03:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:30,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:03:30,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:30,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:31,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47698261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:31,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:31,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2021-11-22 16:03:31,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522993138] [2021-11-22 16:03:31,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 16:03:31,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 16:03:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:03:31,057 INFO L87 Difference]: Start difference. First operand 283 states and 388 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:31,593 INFO L93 Difference]: Finished difference Result 443 states and 533 transitions. [2021-11-22 16:03:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:03:31,594 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-22 16:03:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:31,597 INFO L225 Difference]: With dead ends: 443 [2021-11-22 16:03:31,597 INFO L226 Difference]: Without dead ends: 443 [2021-11-22 16:03:31,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:03:31,599 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 752 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:31,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 1180 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:03:31,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-11-22 16:03:31,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 307. [2021-11-22 16:03:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 257 states have (on average 1.6381322957198443) internal successors, (421), 306 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:31,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 421 transitions. [2021-11-22 16:03:31,610 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 421 transitions. Word has length 12 [2021-11-22 16:03:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:31,610 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 421 transitions. [2021-11-22 16:03:31,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 421 transitions. [2021-11-22 16:03:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 16:03:31,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:31,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:31,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:31,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 16:03:31,827 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash -317713405, now seen corresponding path program 1 times [2021-11-22 16:03:31,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:31,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726875997] [2021-11-22 16:03:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:31,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:31,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:31,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726875997] [2021-11-22 16:03:31,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726875997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:31,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103887415] [2021-11-22 16:03:31,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:31,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:31,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:31,976 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:32,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:03:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:32,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 16:03:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:32,173 INFO L388 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 [2021-11-22 16:03:32,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:32,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:32,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103887415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:32,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:32,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-22 16:03:32,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411413752] [2021-11-22 16:03:32,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:32,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:03:32,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:32,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:03:32,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:03:32,254 INFO L87 Difference]: Start difference. First operand 307 states and 421 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:32,813 INFO L93 Difference]: Finished difference Result 480 states and 600 transitions. [2021-11-22 16:03:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:03:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 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 13 [2021-11-22 16:03:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:32,816 INFO L225 Difference]: With dead ends: 480 [2021-11-22 16:03:32,816 INFO L226 Difference]: Without dead ends: 480 [2021-11-22 16:03:32,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:03:32,818 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 860 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:32,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 955 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 16:03:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-22 16:03:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 322. [2021-11-22 16:03:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 273 states have (on average 1.6263736263736264) internal successors, (444), 321 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 444 transitions. [2021-11-22 16:03:32,837 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 444 transitions. Word has length 13 [2021-11-22 16:03:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:32,838 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 444 transitions. [2021-11-22 16:03:32,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 444 transitions. [2021-11-22 16:03:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 16:03:32,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:32,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:32,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:33,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:33,059 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1259180916, now seen corresponding path program 1 times [2021-11-22 16:03:33,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:33,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519297873] [2021-11-22 16:03:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:33,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:33,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:33,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519297873] [2021-11-22 16:03:33,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519297873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:33,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510738236] [2021-11-22 16:03:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:33,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:33,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:33,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:33,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:03:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 16:03:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:33,522 INFO L388 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 37 treesize of output 25 [2021-11-22 16:03:33,533 INFO L388 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 22 treesize of output 10 [2021-11-22 16:03:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:33,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:33,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510738236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:33,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:33,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2021-11-22 16:03:33,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134487517] [2021-11-22 16:03:33,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:33,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 16:03:33,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:33,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 16:03:33,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:03:33,690 INFO L87 Difference]: Start difference. First operand 322 states and 444 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:34,743 INFO L93 Difference]: Finished difference Result 786 states and 951 transitions. [2021-11-22 16:03:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 16:03:34,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-22 16:03:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:34,748 INFO L225 Difference]: With dead ends: 786 [2021-11-22 16:03:34,748 INFO L226 Difference]: Without dead ends: 786 [2021-11-22 16:03:34,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-11-22 16:03:34,750 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 1256 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1256 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:34,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1256 Valid, 1990 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:03:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-11-22 16:03:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 381. [2021-11-22 16:03:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 333 states have (on average 1.6366366366366367) internal successors, (545), 380 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 545 transitions. [2021-11-22 16:03:34,766 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 545 transitions. Word has length 14 [2021-11-22 16:03:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:34,767 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 545 transitions. [2021-11-22 16:03:34,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 545 transitions. [2021-11-22 16:03:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 16:03:34,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:34,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:34,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:34,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:34,987 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:34,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:34,987 INFO L85 PathProgramCache]: Analyzing trace with hash -723310514, now seen corresponding path program 1 times [2021-11-22 16:03:34,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:34,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566555458] [2021-11-22 16:03:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:34,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:34,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:35,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:35,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566555458] [2021-11-22 16:03:35,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566555458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:35,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:35,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:35,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108384397] [2021-11-22 16:03:35,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:35,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:35,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:35,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:35,017 INFO L87 Difference]: Start difference. First operand 381 states and 545 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:35,028 INFO L93 Difference]: Finished difference Result 426 states and 599 transitions. [2021-11-22 16:03:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:35,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 16:03:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:35,031 INFO L225 Difference]: With dead ends: 426 [2021-11-22 16:03:35,032 INFO L226 Difference]: Without dead ends: 426 [2021-11-22 16:03:35,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:35,033 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 81 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:35,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 275 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-22 16:03:35,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 284. [2021-11-22 16:03:35,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 254 states have (on average 1.578740157480315) internal successors, (401), 283 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 401 transitions. [2021-11-22 16:03:35,044 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 401 transitions. Word has length 16 [2021-11-22 16:03:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:35,044 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 401 transitions. [2021-11-22 16:03:35,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 401 transitions. [2021-11-22 16:03:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 16:03:35,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:35,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:35,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 16:03:35,047 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:35,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:35,047 INFO L85 PathProgramCache]: Analyzing trace with hash -947142882, now seen corresponding path program 1 times [2021-11-22 16:03:35,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:35,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471467202] [2021-11-22 16:03:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:35,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:35,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:35,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471467202] [2021-11-22 16:03:35,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471467202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:35,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:35,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:35,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270424906] [2021-11-22 16:03:35,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:35,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:35,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:35,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:35,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:35,098 INFO L87 Difference]: Start difference. First operand 284 states and 401 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:35,125 INFO L93 Difference]: Finished difference Result 318 states and 420 transitions. [2021-11-22 16:03:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:35,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 16:03:35,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:35,127 INFO L225 Difference]: With dead ends: 318 [2021-11-22 16:03:35,127 INFO L226 Difference]: Without dead ends: 318 [2021-11-22 16:03:35,128 INFO L932 BasicCegarLoop]: 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 [2021-11-22 16:03:35,128 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 75 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:35,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 174 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-22 16:03:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 298. [2021-11-22 16:03:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 275 states have (on average 1.5018181818181817) internal successors, (413), 297 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 413 transitions. [2021-11-22 16:03:35,137 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 413 transitions. Word has length 17 [2021-11-22 16:03:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:35,137 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 413 transitions. [2021-11-22 16:03:35,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 413 transitions. [2021-11-22 16:03:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 16:03:35,139 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:35,139 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:35,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-22 16:03:35,139 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:35,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:35,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1555868704, now seen corresponding path program 1 times [2021-11-22 16:03:35,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:35,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725019522] [2021-11-22 16:03:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:35,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:35,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:35,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725019522] [2021-11-22 16:03:35,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725019522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:35,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:35,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:35,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223413618] [2021-11-22 16:03:35,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:35,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:35,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:35,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:35,165 INFO L87 Difference]: Start difference. First operand 298 states and 413 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:35,176 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2021-11-22 16:03:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 16:03:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:35,179 INFO L225 Difference]: With dead ends: 232 [2021-11-22 16:03:35,179 INFO L226 Difference]: Without dead ends: 232 [2021-11-22 16:03:35,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:35,180 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 85 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:35,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 215 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-22 16:03:35,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2021-11-22 16:03:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 199 states have (on average 1.4522613065326633) internal successors, (289), 221 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 289 transitions. [2021-11-22 16:03:35,187 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 289 transitions. Word has length 20 [2021-11-22 16:03:35,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:35,187 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 289 transitions. [2021-11-22 16:03:35,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 289 transitions. [2021-11-22 16:03:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 16:03:35,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:35,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:35,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-22 16:03:35,190 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash 321116316, now seen corresponding path program 1 times [2021-11-22 16:03:35,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:35,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348782762] [2021-11-22 16:03:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:35,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:35,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:35,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348782762] [2021-11-22 16:03:35,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348782762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:35,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:35,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:03:35,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456163215] [2021-11-22 16:03:35,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:35,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:03:35,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:03:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:35,300 INFO L87 Difference]: Start difference. First operand 222 states and 289 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:35,503 INFO L93 Difference]: Finished difference Result 321 states and 385 transitions. [2021-11-22 16:03:35,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:03:35,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 16:03:35,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:35,506 INFO L225 Difference]: With dead ends: 321 [2021-11-22 16:03:35,506 INFO L226 Difference]: Without dead ends: 321 [2021-11-22 16:03:35,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:03:35,507 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 495 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:35,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 114 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:03:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-22 16:03:35,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 230. [2021-11-22 16:03:35,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 209 states have (on average 1.4162679425837321) internal successors, (296), 229 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 296 transitions. [2021-11-22 16:03:35,514 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 296 transitions. Word has length 22 [2021-11-22 16:03:35,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:35,515 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 296 transitions. [2021-11-22 16:03:35,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,515 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 296 transitions. [2021-11-22 16:03:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 16:03:35,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:35,517 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:35,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-22 16:03:35,517 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:35,518 INFO L85 PathProgramCache]: Analyzing trace with hash -955921151, now seen corresponding path program 1 times [2021-11-22 16:03:35,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:35,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979627904] [2021-11-22 16:03:35,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:35,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:35,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:35,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979627904] [2021-11-22 16:03:35,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979627904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:35,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:35,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:35,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109831160] [2021-11-22 16:03:35,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:35,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:35,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:35,568 INFO L87 Difference]: Start difference. First operand 230 states and 296 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:35,648 INFO L93 Difference]: Finished difference Result 255 states and 314 transitions. [2021-11-22 16:03:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:35,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 16:03:35,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:35,651 INFO L225 Difference]: With dead ends: 255 [2021-11-22 16:03:35,651 INFO L226 Difference]: Without dead ends: 255 [2021-11-22 16:03:35,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:35,652 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 81 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:35,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 160 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-22 16:03:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 229. [2021-11-22 16:03:35,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 209 states have (on average 1.3971291866028708) internal successors, (292), 228 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 292 transitions. [2021-11-22 16:03:35,659 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 292 transitions. Word has length 23 [2021-11-22 16:03:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:35,660 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 292 transitions. [2021-11-22 16:03:35,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 292 transitions. [2021-11-22 16:03:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 16:03:35,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:35,661 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:35,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-22 16:03:35,662 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash 431215531, now seen corresponding path program 1 times [2021-11-22 16:03:35,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:35,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298138936] [2021-11-22 16:03:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:35,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:35,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:35,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:35,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298138936] [2021-11-22 16:03:35,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298138936] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:35,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:35,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:35,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537250456] [2021-11-22 16:03:35,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:35,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:35,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:35,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:35,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:35,744 INFO L87 Difference]: Start difference. First operand 229 states and 292 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:35,823 INFO L93 Difference]: Finished difference Result 237 states and 295 transitions. [2021-11-22 16:03:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-22 16:03:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:35,825 INFO L225 Difference]: With dead ends: 237 [2021-11-22 16:03:35,825 INFO L226 Difference]: Without dead ends: 237 [2021-11-22 16:03:35,827 INFO L932 BasicCegarLoop]: 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 [2021-11-22 16:03:35,828 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 62 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:35,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 218 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:35,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-22 16:03:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2021-11-22 16:03:35,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 209 states have (on average 1.38755980861244) internal successors, (290), 228 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 290 transitions. [2021-11-22 16:03:35,836 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 290 transitions. Word has length 24 [2021-11-22 16:03:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:35,836 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 290 transitions. [2021-11-22 16:03:35,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 290 transitions. [2021-11-22 16:03:35,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 16:03:35,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:35,837 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:35,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-22 16:03:35,838 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:35,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:35,838 INFO L85 PathProgramCache]: Analyzing trace with hash -644864229, now seen corresponding path program 1 times [2021-11-22 16:03:35,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:35,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025821073] [2021-11-22 16:03:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:35,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:36,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:36,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025821073] [2021-11-22 16:03:36,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025821073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:36,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:36,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 16:03:36,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326430786] [2021-11-22 16:03:36,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:36,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:03:36,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:36,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:03:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:03:36,139 INFO L87 Difference]: Start difference. First operand 229 states and 290 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:36,522 INFO L93 Difference]: Finished difference Result 315 states and 372 transitions. [2021-11-22 16:03:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:03:36,523 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-22 16:03:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:36,525 INFO L225 Difference]: With dead ends: 315 [2021-11-22 16:03:36,525 INFO L226 Difference]: Without dead ends: 315 [2021-11-22 16:03:36,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:03:36,526 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 359 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:36,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 305 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:03:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-22 16:03:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 229. [2021-11-22 16:03:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 209 states have (on average 1.368421052631579) internal successors, (286), 228 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 286 transitions. [2021-11-22 16:03:36,533 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 286 transitions. Word has length 24 [2021-11-22 16:03:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:36,533 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 286 transitions. [2021-11-22 16:03:36,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 286 transitions. [2021-11-22 16:03:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-22 16:03:36,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:36,535 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:36,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-22 16:03:36,535 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1239229027, now seen corresponding path program 1 times [2021-11-22 16:03:36,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:36,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884840850] [2021-11-22 16:03:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:36,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:36,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:36,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884840850] [2021-11-22 16:03:36,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884840850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:36,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:36,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:03:36,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766052510] [2021-11-22 16:03:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:36,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:03:36,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:03:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:36,631 INFO L87 Difference]: Start difference. First operand 229 states and 286 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:36,803 INFO L93 Difference]: Finished difference Result 270 states and 318 transitions. [2021-11-22 16:03:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:03:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-22 16:03:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:36,805 INFO L225 Difference]: With dead ends: 270 [2021-11-22 16:03:36,805 INFO L226 Difference]: Without dead ends: 270 [2021-11-22 16:03:36,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:03:36,806 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 223 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:36,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 238 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-22 16:03:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 228. [2021-11-22 16:03:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 209 states have (on average 1.3588516746411483) internal successors, (284), 227 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 284 transitions. [2021-11-22 16:03:36,813 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 284 transitions. Word has length 26 [2021-11-22 16:03:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:36,813 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 284 transitions. [2021-11-22 16:03:36,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 284 transitions. [2021-11-22 16:03:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 16:03:36,815 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:36,816 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:36,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-22 16:03:36,816 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:36,817 INFO L85 PathProgramCache]: Analyzing trace with hash 141596739, now seen corresponding path program 1 times [2021-11-22 16:03:36,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:36,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414337537] [2021-11-22 16:03:36,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:36,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:36,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414337537] [2021-11-22 16:03:36,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414337537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:36,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923852037] [2021-11-22 16:03:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:36,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:36,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:36,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:36,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:03:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:37,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 16:03:37,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:37,243 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:03:37,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-22 16:03:37,252 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:03:37,253 INFO L388 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 21 treesize of output 17 [2021-11-22 16:03:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:37,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:38,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923852037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:38,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:38,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2021-11-22 16:03:38,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663677477] [2021-11-22 16:03:38,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:38,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 16:03:38,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:38,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 16:03:38,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:03:38,044 INFO L87 Difference]: Start difference. First operand 228 states and 284 transitions. Second operand has 16 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:38,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:38,578 INFO L93 Difference]: Finished difference Result 362 states and 429 transitions. [2021-11-22 16:03:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:03:38,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 16:03:38,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:38,581 INFO L225 Difference]: With dead ends: 362 [2021-11-22 16:03:38,581 INFO L226 Difference]: Without dead ends: 362 [2021-11-22 16:03:38,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-11-22 16:03:38,582 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 650 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:38,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 780 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 307 Invalid, 0 Unknown, 341 Unchecked, 0.3s Time] [2021-11-22 16:03:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-22 16:03:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 267. [2021-11-22 16:03:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 251 states have (on average 1.3346613545816732) internal successors, (335), 266 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 335 transitions. [2021-11-22 16:03:38,591 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 335 transitions. Word has length 30 [2021-11-22 16:03:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:38,591 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 335 transitions. [2021-11-22 16:03:38,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 335 transitions. [2021-11-22 16:03:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 16:03:38,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:38,593 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:38,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:38,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 16:03:38,811 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:38,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1533677601, now seen corresponding path program 1 times [2021-11-22 16:03:38,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:38,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000543037] [2021-11-22 16:03:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:38,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:38,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:38,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000543037] [2021-11-22 16:03:38,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000543037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:38,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:38,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:38,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733637268] [2021-11-22 16:03:38,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:38,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:38,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:38,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:38,846 INFO L87 Difference]: Start difference. First operand 267 states and 335 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:38,883 INFO L93 Difference]: Finished difference Result 273 states and 338 transitions. [2021-11-22 16:03:38,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:38,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 16:03:38,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:38,886 INFO L225 Difference]: With dead ends: 273 [2021-11-22 16:03:38,886 INFO L226 Difference]: Without dead ends: 273 [2021-11-22 16:03:38,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:38,887 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 150 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:38,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 189 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-22 16:03:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 265. [2021-11-22 16:03:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 251 states have (on average 1.3266932270916334) internal successors, (333), 264 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 333 transitions. [2021-11-22 16:03:38,894 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 333 transitions. Word has length 35 [2021-11-22 16:03:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:38,895 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 333 transitions. [2021-11-22 16:03:38,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 333 transitions. [2021-11-22 16:03:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 16:03:38,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:38,896 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:38,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-22 16:03:38,896 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:38,897 INFO L85 PathProgramCache]: Analyzing trace with hash 299365564, now seen corresponding path program 1 times [2021-11-22 16:03:38,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:38,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201048115] [2021-11-22 16:03:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:38,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:38,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:38,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201048115] [2021-11-22 16:03:38,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201048115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:38,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:38,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:38,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715631284] [2021-11-22 16:03:38,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:38,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:38,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:38,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:38,951 INFO L87 Difference]: Start difference. First operand 265 states and 333 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:38,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:38,992 INFO L93 Difference]: Finished difference Result 271 states and 336 transitions. [2021-11-22 16:03:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:38,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 16:03:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:38,995 INFO L225 Difference]: With dead ends: 271 [2021-11-22 16:03:38,996 INFO L226 Difference]: Without dead ends: 271 [2021-11-22 16:03:38,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:38,997 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 145 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:38,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 177 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-22 16:03:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 263. [2021-11-22 16:03:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 251 states have (on average 1.3187250996015936) internal successors, (331), 262 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 331 transitions. [2021-11-22 16:03:39,010 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 331 transitions. Word has length 36 [2021-11-22 16:03:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:39,010 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 331 transitions. [2021-11-22 16:03:39,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 331 transitions. [2021-11-22 16:03:39,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-22 16:03:39,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:39,012 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:39,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-22 16:03:39,013 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:39,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash 690398083, now seen corresponding path program 1 times [2021-11-22 16:03:39,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:39,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101599506] [2021-11-22 16:03:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:39,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:39,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:39,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101599506] [2021-11-22 16:03:39,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101599506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:39,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:39,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:39,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852361037] [2021-11-22 16:03:39,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:39,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:39,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:39,076 INFO L87 Difference]: Start difference. First operand 263 states and 331 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:39,167 INFO L93 Difference]: Finished difference Result 286 states and 350 transitions. [2021-11-22 16:03:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:39,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-22 16:03:39,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:39,169 INFO L225 Difference]: With dead ends: 286 [2021-11-22 16:03:39,169 INFO L226 Difference]: Without dead ends: 286 [2021-11-22 16:03:39,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:39,170 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 115 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:39,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 216 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-22 16:03:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 271. [2021-11-22 16:03:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 260 states have (on average 1.3153846153846154) internal successors, (342), 270 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 342 transitions. [2021-11-22 16:03:39,178 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 342 transitions. Word has length 37 [2021-11-22 16:03:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:39,179 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 342 transitions. [2021-11-22 16:03:39,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 342 transitions. [2021-11-22 16:03:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 16:03:39,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:39,180 INFO L514 BasicCegarLoop]: 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, 1, 1] [2021-11-22 16:03:39,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-22 16:03:39,180 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash 476300630, now seen corresponding path program 1 times [2021-11-22 16:03:39,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:39,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291561718] [2021-11-22 16:03:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:39,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:39,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:39,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291561718] [2021-11-22 16:03:39,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291561718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:39,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:39,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:39,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280180662] [2021-11-22 16:03:39,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:39,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:39,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:39,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:39,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:39,224 INFO L87 Difference]: Start difference. First operand 271 states and 342 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:39,280 INFO L93 Difference]: Finished difference Result 284 states and 342 transitions. [2021-11-22 16:03:39,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:39,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 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 39 [2021-11-22 16:03:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:39,283 INFO L225 Difference]: With dead ends: 284 [2021-11-22 16:03:39,283 INFO L226 Difference]: Without dead ends: 284 [2021-11-22 16:03:39,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:39,285 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 83 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:39,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 142 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:39,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-22 16:03:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 271. [2021-11-22 16:03:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 260 states have (on average 1.2884615384615385) internal successors, (335), 270 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 335 transitions. [2021-11-22 16:03:39,293 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 335 transitions. Word has length 39 [2021-11-22 16:03:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:39,293 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 335 transitions. [2021-11-22 16:03:39,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 335 transitions. [2021-11-22 16:03:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 16:03:39,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:39,294 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-11-22 16:03:39,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-22 16:03:39,295 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1880417871, now seen corresponding path program 1 times [2021-11-22 16:03:39,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:39,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813602406] [2021-11-22 16:03:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:39,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:39,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:39,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813602406] [2021-11-22 16:03:39,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813602406] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:39,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:39,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:39,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470122294] [2021-11-22 16:03:39,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:39,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:39,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:39,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:39,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:39,362 INFO L87 Difference]: Start difference. First operand 271 states and 335 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:39,425 INFO L93 Difference]: Finished difference Result 277 states and 338 transitions. [2021-11-22 16:03:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:39,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-22 16:03:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:39,428 INFO L225 Difference]: With dead ends: 277 [2021-11-22 16:03:39,428 INFO L226 Difference]: Without dead ends: 277 [2021-11-22 16:03:39,428 INFO L932 BasicCegarLoop]: 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 [2021-11-22 16:03:39,429 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 46 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:39,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 199 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-22 16:03:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 271. [2021-11-22 16:03:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 260 states have (on average 1.2807692307692307) internal successors, (333), 270 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 333 transitions. [2021-11-22 16:03:39,436 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 333 transitions. Word has length 40 [2021-11-22 16:03:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:39,437 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 333 transitions. [2021-11-22 16:03:39,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 333 transitions. [2021-11-22 16:03:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 16:03:39,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:39,438 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-22 16:03:39,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-22 16:03:39,438 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:39,439 INFO L85 PathProgramCache]: Analyzing trace with hash 931541993, now seen corresponding path program 1 times [2021-11-22 16:03:39,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:39,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339941660] [2021-11-22 16:03:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:39,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:39,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:39,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339941660] [2021-11-22 16:03:39,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339941660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:39,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593104767] [2021-11-22 16:03:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:39,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:39,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:39,481 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:39,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:03:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:03:39,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:39,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:03:39,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593104767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:39,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:03:39,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-11-22 16:03:39,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295177709] [2021-11-22 16:03:39,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:39,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:39,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:39,634 INFO L87 Difference]: Start difference. First operand 271 states and 333 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:39,712 INFO L93 Difference]: Finished difference Result 349 states and 408 transitions. [2021-11-22 16:03:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:03:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-22 16:03:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:39,715 INFO L225 Difference]: With dead ends: 349 [2021-11-22 16:03:39,715 INFO L226 Difference]: Without dead ends: 349 [2021-11-22 16:03:39,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:39,716 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 155 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:39,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 354 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-22 16:03:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 260. [2021-11-22 16:03:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 250 states have (on average 1.26) internal successors, (315), 259 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-11-22 16:03:39,725 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 40 [2021-11-22 16:03:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:39,725 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-11-22 16:03:39,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-11-22 16:03:39,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-22 16:03:39,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:39,726 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1] [2021-11-22 16:03:39,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-22 16:03:39,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-22 16:03:39,945 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:39,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash -125181343, now seen corresponding path program 1 times [2021-11-22 16:03:39,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:39,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011161382] [2021-11-22 16:03:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:39,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:40,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:40,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011161382] [2021-11-22 16:03:40,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011161382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:40,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:40,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:03:40,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465940286] [2021-11-22 16:03:40,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:40,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:03:40,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:40,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:03:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:40,014 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:40,186 INFO L93 Difference]: Finished difference Result 295 states and 335 transitions. [2021-11-22 16:03:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:03:40,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-22 16:03:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:40,188 INFO L225 Difference]: With dead ends: 295 [2021-11-22 16:03:40,189 INFO L226 Difference]: Without dead ends: 295 [2021-11-22 16:03:40,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:03:40,189 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 318 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:40,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 207 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:40,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-22 16:03:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 259. [2021-11-22 16:03:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 250 states have (on average 1.232) internal successors, (308), 258 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 308 transitions. [2021-11-22 16:03:40,205 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 308 transitions. Word has length 42 [2021-11-22 16:03:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:40,205 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 308 transitions. [2021-11-22 16:03:40,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:40,206 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 308 transitions. [2021-11-22 16:03:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 16:03:40,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:40,206 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:40,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-22 16:03:40,207 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:40,207 INFO L85 PathProgramCache]: Analyzing trace with hash 908584562, now seen corresponding path program 1 times [2021-11-22 16:03:40,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668537280] [2021-11-22 16:03:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:40,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:40,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668537280] [2021-11-22 16:03:40,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668537280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:40,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:40,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:03:40,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061904283] [2021-11-22 16:03:40,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:40,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:03:40,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:03:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:03:40,278 INFO L87 Difference]: Start difference. First operand 259 states and 308 transitions. Second operand has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:40,391 INFO L93 Difference]: Finished difference Result 266 states and 314 transitions. [2021-11-22 16:03:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:40,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-22 16:03:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:40,393 INFO L225 Difference]: With dead ends: 266 [2021-11-22 16:03:40,394 INFO L226 Difference]: Without dead ends: 266 [2021-11-22 16:03:40,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:03:40,395 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 200 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:40,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 120 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:40,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-22 16:03:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 258. [2021-11-22 16:03:40,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 250 states have (on average 1.228) internal successors, (307), 257 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 307 transitions. [2021-11-22 16:03:40,407 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 307 transitions. Word has length 43 [2021-11-22 16:03:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:40,408 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 307 transitions. [2021-11-22 16:03:40,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.166666666666667) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 307 transitions. [2021-11-22 16:03:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-22 16:03:40,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:40,409 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:40,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-22 16:03:40,410 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:40,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1898649489, now seen corresponding path program 1 times [2021-11-22 16:03:40,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:40,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806701366] [2021-11-22 16:03:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:40,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:40,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:40,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806701366] [2021-11-22 16:03:40,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806701366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:40,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:40,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 16:03:40,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529995467] [2021-11-22 16:03:40,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:40,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:03:40,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:03:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:03:40,743 INFO L87 Difference]: Start difference. First operand 258 states and 307 transitions. Second operand has 11 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:41,266 INFO L93 Difference]: Finished difference Result 348 states and 401 transitions. [2021-11-22 16:03:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:03:41,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-22 16:03:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:41,269 INFO L225 Difference]: With dead ends: 348 [2021-11-22 16:03:41,269 INFO L226 Difference]: Without dead ends: 348 [2021-11-22 16:03:41,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:03:41,270 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 518 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:41,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 287 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:03:41,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-22 16:03:41,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 258. [2021-11-22 16:03:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 250 states have (on average 1.224) internal successors, (306), 257 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 306 transitions. [2021-11-22 16:03:41,277 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 306 transitions. Word has length 44 [2021-11-22 16:03:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:41,278 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 306 transitions. [2021-11-22 16:03:41,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 306 transitions. [2021-11-22 16:03:41,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-22 16:03:41,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:41,279 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:41,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-22 16:03:41,279 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:41,280 INFO L85 PathProgramCache]: Analyzing trace with hash 758949073, now seen corresponding path program 1 times [2021-11-22 16:03:41,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:41,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609095651] [2021-11-22 16:03:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:41,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:41,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:41,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609095651] [2021-11-22 16:03:41,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609095651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:41,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:41,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:03:41,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321165994] [2021-11-22 16:03:41,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:41,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:03:41,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:03:41,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:41,362 INFO L87 Difference]: Start difference. First operand 258 states and 306 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:41,497 INFO L93 Difference]: Finished difference Result 271 states and 316 transitions. [2021-11-22 16:03:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:03:41,504 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-11-22 16:03:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:41,505 INFO L225 Difference]: With dead ends: 271 [2021-11-22 16:03:41,506 INFO L226 Difference]: Without dead ends: 271 [2021-11-22 16:03:41,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:03:41,506 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 292 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:41,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 136 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-22 16:03:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 257. [2021-11-22 16:03:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 250 states have (on average 1.216) internal successors, (304), 256 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 304 transitions. [2021-11-22 16:03:41,514 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 304 transitions. Word has length 46 [2021-11-22 16:03:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:41,514 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 304 transitions. [2021-11-22 16:03:41,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 304 transitions. [2021-11-22 16:03:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-22 16:03:41,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:41,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:41,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-22 16:03:41,516 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:41,517 INFO L85 PathProgramCache]: Analyzing trace with hash -334960540, now seen corresponding path program 1 times [2021-11-22 16:03:41,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:41,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861168487] [2021-11-22 16:03:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:41,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 16:03:41,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861168487] [2021-11-22 16:03:41,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861168487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:41,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380939455] [2021-11-22 16:03:41,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:41,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:41,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:41,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:03:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:41,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 16:03:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:42,099 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:03:42,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-22 16:03:42,107 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:03:42,107 INFO L388 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 21 treesize of output 17 [2021-11-22 16:03:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:03:42,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:03:43,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380939455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:43,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:43,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2021-11-22 16:03:43,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165709665] [2021-11-22 16:03:43,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:43,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 16:03:43,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:43,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 16:03:43,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:03:43,133 INFO L87 Difference]: Start difference. First operand 257 states and 304 transitions. Second operand has 17 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:43,987 INFO L93 Difference]: Finished difference Result 392 states and 444 transitions. [2021-11-22 16:03:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 16:03:43,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-22 16:03:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:43,990 INFO L225 Difference]: With dead ends: 392 [2021-11-22 16:03:43,990 INFO L226 Difference]: Without dead ends: 392 [2021-11-22 16:03:43,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2021-11-22 16:03:43,992 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 620 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:43,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 945 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 452 Invalid, 0 Unknown, 258 Unchecked, 0.4s Time] [2021-11-22 16:03:43,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-22 16:03:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 266. [2021-11-22 16:03:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 259 states have (on average 1.2123552123552124) internal successors, (314), 265 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 314 transitions. [2021-11-22 16:03:44,000 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 314 transitions. Word has length 48 [2021-11-22 16:03:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:44,000 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 314 transitions. [2021-11-22 16:03:44,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 7.625) internal successors, (122), 16 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 314 transitions. [2021-11-22 16:03:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-22 16:03:44,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:44,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:44,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:44,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-22 16:03:44,219 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:44,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1575916377, now seen corresponding path program 1 times [2021-11-22 16:03:44,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:44,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676487670] [2021-11-22 16:03:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:44,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-22 16:03:44,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:44,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676487670] [2021-11-22 16:03:44,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676487670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:44,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342852285] [2021-11-22 16:03:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:44,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:44,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:44,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:44,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:03:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:44,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 16:03:44,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:44,839 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:03:44,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-22 16:03:44,846 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:03:44,847 INFO L388 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 21 treesize of output 17 [2021-11-22 16:03:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:03:45,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:03:45,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342852285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:45,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:45,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2021-11-22 16:03:45,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115145242] [2021-11-22 16:03:45,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:45,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 16:03:45,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 16:03:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:03:45,859 INFO L87 Difference]: Start difference. First operand 266 states and 314 transitions. Second operand has 17 states, 16 states have (on average 8.0) internal successors, (128), 16 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:46,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:46,669 INFO L93 Difference]: Finished difference Result 383 states and 435 transitions. [2021-11-22 16:03:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 16:03:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 8.0) internal successors, (128), 16 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-22 16:03:46,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:46,672 INFO L225 Difference]: With dead ends: 383 [2021-11-22 16:03:46,672 INFO L226 Difference]: Without dead ends: 383 [2021-11-22 16:03:46,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=874, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 16:03:46,673 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 599 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:46,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 754 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 311 Invalid, 0 Unknown, 126 Unchecked, 0.3s Time] [2021-11-22 16:03:46,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-22 16:03:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 256. [2021-11-22 16:03:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.204) internal successors, (301), 255 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 301 transitions. [2021-11-22 16:03:46,682 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 301 transitions. Word has length 50 [2021-11-22 16:03:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:46,682 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 301 transitions. [2021-11-22 16:03:46,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 8.0) internal successors, (128), 16 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:46,682 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 301 transitions. [2021-11-22 16:03:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-22 16:03:46,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:46,683 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:46,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-22 16:03:46,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:46,904 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:46,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1514072040, now seen corresponding path program 1 times [2021-11-22 16:03:46,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:46,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437275330] [2021-11-22 16:03:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:46,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 16:03:46,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:46,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437275330] [2021-11-22 16:03:46,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437275330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:46,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:46,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:03:46,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939591539] [2021-11-22 16:03:46,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:46,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:46,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:46,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:46,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:46,961 INFO L87 Difference]: Start difference. First operand 256 states and 301 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:46,993 INFO L93 Difference]: Finished difference Result 247 states and 285 transitions. [2021-11-22 16:03:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 50 [2021-11-22 16:03:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:46,995 INFO L225 Difference]: With dead ends: 247 [2021-11-22 16:03:46,995 INFO L226 Difference]: Without dead ends: 247 [2021-11-22 16:03:46,996 INFO L932 BasicCegarLoop]: 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 [2021-11-22 16:03:46,996 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 113 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:47,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 245 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-11-22 16:03:47,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 238. [2021-11-22 16:03:47,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.1939655172413792) internal successors, (277), 237 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:47,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 277 transitions. [2021-11-22 16:03:47,008 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 277 transitions. Word has length 50 [2021-11-22 16:03:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:47,009 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 277 transitions. [2021-11-22 16:03:47,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:47,009 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 277 transitions. [2021-11-22 16:03:47,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 16:03:47,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:47,010 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:47,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-22 16:03:47,011 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:47,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1084090976, now seen corresponding path program 1 times [2021-11-22 16:03:47,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:47,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469749067] [2021-11-22 16:03:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:47,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:47,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:47,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469749067] [2021-11-22 16:03:47,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469749067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:47,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:47,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:47,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909530776] [2021-11-22 16:03:47,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:47,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:03:47,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:47,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:03:47,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:03:47,054 INFO L87 Difference]: Start difference. First operand 238 states and 277 transitions. Second operand has 3 states, 2 states have (on average 25.5) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:47,092 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2021-11-22 16:03:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:03:47,092 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 25.5) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 16:03:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:47,093 INFO L225 Difference]: With dead ends: 245 [2021-11-22 16:03:47,094 INFO L226 Difference]: Without dead ends: 238 [2021-11-22 16:03:47,094 INFO L932 BasicCegarLoop]: 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 [2021-11-22 16:03:47,094 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 12 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:47,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-22 16:03:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2021-11-22 16:03:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.1810344827586208) internal successors, (274), 237 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 274 transitions. [2021-11-22 16:03:47,101 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 274 transitions. Word has length 51 [2021-11-22 16:03:47,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:47,102 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 274 transitions. [2021-11-22 16:03:47,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 25.5) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 274 transitions. [2021-11-22 16:03:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 16:03:47,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:47,103 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:47,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-22 16:03:47,104 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:47,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1785193819, now seen corresponding path program 1 times [2021-11-22 16:03:47,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:47,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557915408] [2021-11-22 16:03:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:47,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:47,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:47,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557915408] [2021-11-22 16:03:47,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557915408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:47,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663805946] [2021-11-22 16:03:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:47,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:47,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:47,142 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:47,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:03:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:47,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:03:47,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:47,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:47,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663805946] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:47,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:47,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-22 16:03:47,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992118991] [2021-11-22 16:03:47,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:47,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:47,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:47,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:47,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:47,396 INFO L87 Difference]: Start difference. First operand 238 states and 274 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:47,446 INFO L93 Difference]: Finished difference Result 314 states and 352 transitions. [2021-11-22 16:03:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:47,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-22 16:03:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:47,449 INFO L225 Difference]: With dead ends: 314 [2021-11-22 16:03:47,449 INFO L226 Difference]: Without dead ends: 314 [2021-11-22 16:03:47,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:47,450 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 228 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:47,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 147 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-22 16:03:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 238. [2021-11-22 16:03:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.1767241379310345) internal successors, (273), 237 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 273 transitions. [2021-11-22 16:03:47,458 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 273 transitions. Word has length 52 [2021-11-22 16:03:47,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:47,458 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 273 transitions. [2021-11-22 16:03:47,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:47,459 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 273 transitions. [2021-11-22 16:03:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 16:03:47,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:47,460 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:47,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:47,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:47,681 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:47,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1785194456, now seen corresponding path program 1 times [2021-11-22 16:03:47,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:47,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554290909] [2021-11-22 16:03:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:47,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:47,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554290909] [2021-11-22 16:03:47,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554290909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:47,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235555669] [2021-11-22 16:03:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:47,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:47,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:47,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:47,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:03:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:47,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 16:03:47,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:48,049 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-22 16:03:48,049 INFO L388 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 [2021-11-22 16:03:48,297 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-11-22 16:03:48,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-22 16:03:48,380 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-22 16:03:48,380 INFO L388 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 21 [2021-11-22 16:03:48,586 INFO L388 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 [2021-11-22 16:03:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:48,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:48,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235555669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:48,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:48,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-11-22 16:03:48,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27737441] [2021-11-22 16:03:48,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:48,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 16:03:48,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 16:03:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-22 16:03:48,919 INFO L87 Difference]: Start difference. First operand 238 states and 273 transitions. Second operand has 23 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:49,835 INFO L93 Difference]: Finished difference Result 339 states and 371 transitions. [2021-11-22 16:03:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 16:03:49,836 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 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 52 [2021-11-22 16:03:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:49,838 INFO L225 Difference]: With dead ends: 339 [2021-11-22 16:03:49,838 INFO L226 Difference]: Without dead ends: 339 [2021-11-22 16:03:49,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2021-11-22 16:03:49,840 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1015 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:49,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1015 Valid, 892 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 833 Invalid, 0 Unknown, 515 Unchecked, 0.5s Time] [2021-11-22 16:03:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-22 16:03:49,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 242. [2021-11-22 16:03:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 236 states have (on average 1.173728813559322) internal successors, (277), 241 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 277 transitions. [2021-11-22 16:03:49,847 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 277 transitions. Word has length 52 [2021-11-22 16:03:49,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:49,848 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 277 transitions. [2021-11-22 16:03:49,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 7.045454545454546) internal successors, (155), 22 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:49,848 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 277 transitions. [2021-11-22 16:03:49,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 16:03:49,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:49,849 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:49,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:50,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:50,063 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash 284233486, now seen corresponding path program 1 times [2021-11-22 16:03:50,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:50,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194609012] [2021-11-22 16:03:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:50,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:50,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:50,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194609012] [2021-11-22 16:03:50,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194609012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:50,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:50,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:03:50,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318369383] [2021-11-22 16:03:50,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:50,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:03:50,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:50,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:03:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:50,179 INFO L87 Difference]: Start difference. First operand 242 states and 277 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:50,360 INFO L93 Difference]: Finished difference Result 406 states and 456 transitions. [2021-11-22 16:03:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:03:50,360 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-11-22 16:03:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:50,362 INFO L225 Difference]: With dead ends: 406 [2021-11-22 16:03:50,362 INFO L226 Difference]: Without dead ends: 406 [2021-11-22 16:03:50,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:03:50,363 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 304 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:50,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 295 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:50,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-22 16:03:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 256. [2021-11-22 16:03:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.16) internal successors, (290), 255 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:50,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 290 transitions. [2021-11-22 16:03:50,371 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 290 transitions. Word has length 53 [2021-11-22 16:03:50,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:50,371 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 290 transitions. [2021-11-22 16:03:50,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:50,372 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 290 transitions. [2021-11-22 16:03:50,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 16:03:50,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:50,373 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:03:50,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-22 16:03:50,373 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:03:50,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash 493546937, now seen corresponding path program 1 times [2021-11-22 16:03:50,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:50,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394735734] [2021-11-22 16:03:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:50,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:50,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:50,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394735734] [2021-11-22 16:03:50,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394735734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:50,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617611383] [2021-11-22 16:03:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:50,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:50,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:50,859 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:50,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 16:03:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:50,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-22 16:03:50,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:51,390 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:03:51,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-22 16:03:51,408 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:03:51,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-22 16:03:52,107 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-22 16:03:52,107 INFO L388 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 3 case distinctions, treesize of input 36 treesize of output 41 [2021-11-22 16:03:52,118 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-22 16:03:52,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 33 [2021-11-22 16:03:52,314 INFO L388 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 30 treesize of output 29 [2021-11-22 16:03:54,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:03:54,353 INFO L388 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 43 treesize of output 31 [2021-11-22 16:03:54,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:03:54,358 INFO L388 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 25 treesize of output 13 [2021-11-22 16:03:54,427 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:03:54,428 INFO L388 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 34 treesize of output 34 [2021-11-22 16:03:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:54,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:54,834 INFO L388 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 22 treesize of output 14 [2021-11-22 16:03:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:56,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617611383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:56,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:03:56,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2021-11-22 16:03:56,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714746104] [2021-11-22 16:03:56,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:56,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-22 16:03:56,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-22 16:03:56,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 16:03:56,557 INFO L87 Difference]: Start difference. First operand 256 states and 290 transitions. Second operand has 37 states, 36 states have (on average 4.416666666666667) internal successors, (159), 36 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:59,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:59,999 INFO L93 Difference]: Finished difference Result 544 states and 608 transitions. [2021-11-22 16:04:00,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-22 16:04:00,000 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.416666666666667) internal successors, (159), 36 states have internal predecessors, (159), 0 states have call successors, (0), 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 53 [2021-11-22 16:04:00,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:00,003 INFO L225 Difference]: With dead ends: 544 [2021-11-22 16:04:00,003 INFO L226 Difference]: Without dead ends: 544 [2021-11-22 16:04:00,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 87 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=881, Invalid=5281, Unknown=0, NotChecked=0, Total=6162 [2021-11-22 16:04:00,007 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 837 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 832 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:00,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 1810 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 936 Invalid, 0 Unknown, 832 Unchecked, 0.6s Time] [2021-11-22 16:04:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-22 16:04:00,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 257. [2021-11-22 16:04:00,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 251 states have (on average 1.159362549800797) internal successors, (291), 256 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 291 transitions. [2021-11-22 16:04:00,024 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 291 transitions. Word has length 53 [2021-11-22 16:04:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:00,024 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 291 transitions. [2021-11-22 16:04:00,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.416666666666667) internal successors, (159), 36 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 291 transitions. [2021-11-22 16:04:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 16:04:00,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:00,026 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:04:00,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:00,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:00,250 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash 5070697, now seen corresponding path program 1 times [2021-11-22 16:04:00,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:00,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407148768] [2021-11-22 16:04:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:00,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:00,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-22 16:04:00,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:00,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407148768] [2021-11-22 16:04:00,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407148768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:04:00,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135234234] [2021-11-22 16:04:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:00,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:00,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:00,385 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:04:00,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 16:04:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:04:00,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:00,754 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:04:00,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-22 16:04:00,759 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:04:00,760 INFO L388 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 21 treesize of output 17 [2021-11-22 16:04:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:04:01,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:04:01,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135234234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:01,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:04:01,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2021-11-22 16:04:01,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280892761] [2021-11-22 16:04:01,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:01,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 16:04:01,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:01,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 16:04:01,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:04:01,778 INFO L87 Difference]: Start difference. First operand 257 states and 291 transitions. Second operand has 18 states, 17 states have (on average 8.235294117647058) internal successors, (140), 17 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:02,503 INFO L93 Difference]: Finished difference Result 385 states and 426 transitions. [2021-11-22 16:04:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 16:04:02,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 8.235294117647058) internal successors, (140), 17 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 16:04:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:02,505 INFO L225 Difference]: With dead ends: 385 [2021-11-22 16:04:02,505 INFO L226 Difference]: Without dead ends: 385 [2021-11-22 16:04:02,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 16:04:02,506 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 714 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:02,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 613 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 278 Invalid, 0 Unknown, 433 Unchecked, 0.2s Time] [2021-11-22 16:04:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-22 16:04:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 270. [2021-11-22 16:04:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.1590909090909092) internal successors, (306), 269 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:02,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 306 transitions. [2021-11-22 16:04:02,514 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 306 transitions. Word has length 54 [2021-11-22 16:04:02,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:02,515 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 306 transitions. [2021-11-22 16:04:02,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 8.235294117647058) internal successors, (140), 17 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:02,515 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 306 transitions. [2021-11-22 16:04:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 16:04:02,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:02,516 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:04:02,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:02,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-22 16:04:02,729 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:02,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:02,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1888394811, now seen corresponding path program 1 times [2021-11-22 16:04:02,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:02,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235147206] [2021-11-22 16:04:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:02,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:02,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:02,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235147206] [2021-11-22 16:04:02,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235147206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 16:04:02,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902486030] [2021-11-22 16:04:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:02,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:02,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:02,952 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:04:02,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 16:04:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:03,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 16:04:03,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:03,113 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-22 16:04:03,114 INFO L388 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 [2021-11-22 16:04:03,333 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-11-22 16:04:03,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-22 16:04:03,420 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-22 16:04:03,420 INFO L388 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 21 [2021-11-22 16:04:03,669 INFO L388 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 [2021-11-22 16:04:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:03,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:04,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902486030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:04,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 16:04:04,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-11-22 16:04:04,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544164228] [2021-11-22 16:04:04,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:04,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 16:04:04,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 16:04:04,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-22 16:04:04,017 INFO L87 Difference]: Start difference. First operand 270 states and 306 transitions. Second operand has 23 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:05,169 INFO L93 Difference]: Finished difference Result 381 states and 415 transitions. [2021-11-22 16:04:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 16:04:05,170 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 0 states have call successors, (0), 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 54 [2021-11-22 16:04:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:05,171 INFO L225 Difference]: With dead ends: 381 [2021-11-22 16:04:05,171 INFO L226 Difference]: Without dead ends: 381 [2021-11-22 16:04:05,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=490, Invalid=1862, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 16:04:05,172 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 1025 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 537 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:05,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1170 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1165 Invalid, 0 Unknown, 537 Unchecked, 0.6s Time] [2021-11-22 16:04:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-22 16:04:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 269. [2021-11-22 16:04:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.1553030303030303) internal successors, (305), 268 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 305 transitions. [2021-11-22 16:04:05,181 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 305 transitions. Word has length 54 [2021-11-22 16:04:05,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:05,182 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 305 transitions. [2021-11-22 16:04:05,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 7.318181818181818) internal successors, (161), 22 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 305 transitions. [2021-11-22 16:04:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-22 16:04:05,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:05,183 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:04:05,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:05,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-22 16:04:05,399 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1589303228, now seen corresponding path program 1 times [2021-11-22 16:04:05,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:05,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679419825] [2021-11-22 16:04:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:05,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:05,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:05,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679419825] [2021-11-22 16:04:05,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679419825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:05,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:05,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-22 16:04:05,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787070149] [2021-11-22 16:04:05,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:05,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:04:05,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:04:05,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:04:05,552 INFO L87 Difference]: Start difference. First operand 269 states and 305 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:05,801 INFO L93 Difference]: Finished difference Result 296 states and 324 transitions. [2021-11-22 16:04:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:04:05,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-22 16:04:05,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:05,803 INFO L225 Difference]: With dead ends: 296 [2021-11-22 16:04:05,803 INFO L226 Difference]: Without dead ends: 296 [2021-11-22 16:04:05,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:04:05,804 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 498 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:05,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 509 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:04:05,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-22 16:04:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 247. [2021-11-22 16:04:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 244 states have (on average 1.1311475409836065) internal successors, (276), 246 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 276 transitions. [2021-11-22 16:04:05,811 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 276 transitions. Word has length 55 [2021-11-22 16:04:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:05,811 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 276 transitions. [2021-11-22 16:04:05,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:05,812 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 276 transitions. [2021-11-22 16:04:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-22 16:04:05,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:05,813 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:04:05,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-22 16:04:05,813 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:05,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:05,814 INFO L85 PathProgramCache]: Analyzing trace with hash 577977258, now seen corresponding path program 1 times [2021-11-22 16:04:05,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:05,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159334085] [2021-11-22 16:04:05,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:05,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-22 16:04:05,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159334085] [2021-11-22 16:04:05,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159334085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:05,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:05,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:04:05,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384874541] [2021-11-22 16:04:05,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:05,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:04:05,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:05,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:04:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:04:05,860 INFO L87 Difference]: Start difference. First operand 247 states and 276 transitions. Second operand has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:05,926 INFO L93 Difference]: Finished difference Result 260 states and 287 transitions. [2021-11-22 16:04:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:04:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-22 16:04:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:05,928 INFO L225 Difference]: With dead ends: 260 [2021-11-22 16:04:05,928 INFO L226 Difference]: Without dead ends: 260 [2021-11-22 16:04:05,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:04:05,929 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 94 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:05,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 117 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:04:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-22 16:04:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 209. [2021-11-22 16:04:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1207729468599035) internal successors, (232), 208 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 232 transitions. [2021-11-22 16:04:05,935 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 232 transitions. Word has length 56 [2021-11-22 16:04:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:05,936 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 232 transitions. [2021-11-22 16:04:05,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 232 transitions. [2021-11-22 16:04:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 16:04:05,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:05,937 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2021-11-22 16:04:05,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-22 16:04:05,938 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash 795588564, now seen corresponding path program 1 times [2021-11-22 16:04:05,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:05,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750767962] [2021-11-22 16:04:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:05,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:04:05,961 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:04:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:04:06,003 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 16:04:06,004 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 16:04:06,005 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_LEAK (57 of 58 remaining) [2021-11-22 16:04:06,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (56 of 58 remaining) [2021-11-22 16:04:06,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (55 of 58 remaining) [2021-11-22 16:04:06,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (54 of 58 remaining) [2021-11-22 16:04:06,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (53 of 58 remaining) [2021-11-22 16:04:06,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (52 of 58 remaining) [2021-11-22 16:04:06,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (51 of 58 remaining) [2021-11-22 16:04:06,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (50 of 58 remaining) [2021-11-22 16:04:06,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (49 of 58 remaining) [2021-11-22 16:04:06,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (48 of 58 remaining) [2021-11-22 16:04:06,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (47 of 58 remaining) [2021-11-22 16:04:06,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (46 of 58 remaining) [2021-11-22 16:04:06,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (45 of 58 remaining) [2021-11-22 16:04:06,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (44 of 58 remaining) [2021-11-22 16:04:06,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (43 of 58 remaining) [2021-11-22 16:04:06,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (42 of 58 remaining) [2021-11-22 16:04:06,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (41 of 58 remaining) [2021-11-22 16:04:06,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (40 of 58 remaining) [2021-11-22 16:04:06,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (39 of 58 remaining) [2021-11-22 16:04:06,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (38 of 58 remaining) [2021-11-22 16:04:06,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (37 of 58 remaining) [2021-11-22 16:04:06,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (36 of 58 remaining) [2021-11-22 16:04:06,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_DEREFERENCE (35 of 58 remaining) [2021-11-22 16:04:06,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_DEREFERENCE (34 of 58 remaining) [2021-11-22 16:04:06,011 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_DEREFERENCE (33 of 58 remaining) [2021-11-22 16:04:06,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE (32 of 58 remaining) [2021-11-22 16:04:06,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (31 of 58 remaining) [2021-11-22 16:04:06,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (30 of 58 remaining) [2021-11-22 16:04:06,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (29 of 58 remaining) [2021-11-22 16:04:06,012 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION (28 of 58 remaining) [2021-11-22 16:04:06,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (27 of 58 remaining) [2021-11-22 16:04:06,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE (26 of 58 remaining) [2021-11-22 16:04:06,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE (25 of 58 remaining) [2021-11-22 16:04:06,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (24 of 58 remaining) [2021-11-22 16:04:06,013 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (23 of 58 remaining) [2021-11-22 16:04:06,014 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE (22 of 58 remaining) [2021-11-22 16:04:06,014 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE (21 of 58 remaining) [2021-11-22 16:04:06,014 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE (20 of 58 remaining) [2021-11-22 16:04:06,014 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE (19 of 58 remaining) [2021-11-22 16:04:06,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION (18 of 58 remaining) [2021-11-22 16:04:06,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION (17 of 58 remaining) [2021-11-22 16:04:06,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 58 remaining) [2021-11-22 16:04:06,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 58 remaining) [2021-11-22 16:04:06,015 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 58 remaining) [2021-11-22 16:04:06,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 58 remaining) [2021-11-22 16:04:06,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION (12 of 58 remaining) [2021-11-22 16:04:06,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION (11 of 58 remaining) [2021-11-22 16:04:06,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION (10 of 58 remaining) [2021-11-22 16:04:06,016 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION (9 of 58 remaining) [2021-11-22 16:04:06,017 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE (8 of 58 remaining) [2021-11-22 16:04:06,017 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_FREE (7 of 58 remaining) [2021-11-22 16:04:06,017 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_FREE (6 of 58 remaining) [2021-11-22 16:04:06,017 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE (5 of 58 remaining) [2021-11-22 16:04:06,017 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_FREE (4 of 58 remaining) [2021-11-22 16:04:06,018 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE (3 of 58 remaining) [2021-11-22 16:04:06,018 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE (2 of 58 remaining) [2021-11-22 16:04:06,018 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE (1 of 58 remaining) [2021-11-22 16:04:06,018 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE (0 of 58 remaining) [2021-11-22 16:04:06,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-22 16:04:06,022 INFO L732 BasicCegarLoop]: Path program 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, 1, 1, 1, 1] [2021-11-22 16:04:06,025 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 16:04:06,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 04:04:06 BoogieIcfgContainer [2021-11-22 16:04:06,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 16:04:06,090 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 16:04:06,090 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 16:04:06,090 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 16:04:06,091 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:03:27" (3/4) ... [2021-11-22 16:04:06,098 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-22 16:04:06,098 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 16:04:06,099 INFO L158 Benchmark]: Toolchain (without parser) took 39881.58ms. Allocated memory was 111.1MB in the beginning and 224.4MB in the end (delta: 113.2MB). Free memory was 77.7MB in the beginning and 164.0MB in the end (delta: -86.2MB). Peak memory consumption was 26.2MB. Max. memory is 16.1GB. [2021-11-22 16:04:06,099 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 111.1MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:04:06,099 INFO L158 Benchmark]: CACSL2BoogieTranslator took 519.44ms. Allocated memory is still 111.1MB. Free memory was 77.5MB in the beginning and 74.9MB in the end (delta: 2.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-22 16:04:06,100 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.21ms. Allocated memory is still 111.1MB. Free memory was 74.9MB in the beginning and 72.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:04:06,100 INFO L158 Benchmark]: Boogie Preprocessor took 68.97ms. Allocated memory is still 111.1MB. Free memory was 72.3MB in the beginning and 70.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:04:06,100 INFO L158 Benchmark]: RCFGBuilder took 776.62ms. Allocated memory was 111.1MB in the beginning and 155.2MB in the end (delta: 44.0MB). Free memory was 70.2MB in the beginning and 125.7MB in the end (delta: -55.6MB). Peak memory consumption was 26.7MB. Max. memory is 16.1GB. [2021-11-22 16:04:06,101 INFO L158 Benchmark]: TraceAbstraction took 38445.26ms. Allocated memory was 155.2MB in the beginning and 224.4MB in the end (delta: 69.2MB). Free memory was 125.2MB in the beginning and 164.0MB in the end (delta: -38.7MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2021-11-22 16:04:06,101 INFO L158 Benchmark]: Witness Printer took 8.62ms. Allocated memory is still 224.4MB. Free memory is still 164.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:04:06,102 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 111.1MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 519.44ms. Allocated memory is still 111.1MB. Free memory was 77.5MB in the beginning and 74.9MB in the end (delta: 2.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.21ms. Allocated memory is still 111.1MB. Free memory was 74.9MB in the beginning and 72.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.97ms. Allocated memory is still 111.1MB. Free memory was 72.3MB in the beginning and 70.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 776.62ms. Allocated memory was 111.1MB in the beginning and 155.2MB in the end (delta: 44.0MB). Free memory was 70.2MB in the beginning and 125.7MB in the end (delta: -55.6MB). Peak memory consumption was 26.7MB. Max. memory is 16.1GB. * TraceAbstraction took 38445.26ms. Allocated memory was 155.2MB in the beginning and 224.4MB in the end (delta: 69.2MB). Free memory was 125.2MB in the beginning and 164.0MB in the end (delta: -38.7MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 8.62ms. Allocated memory is still 224.4MB. Free memory is still 164.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L722] CALL parse_input("c1") [L692] int i = 0; VAL [commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") [L723] CALL parse_input("c1") [L692] int i = 0; VAL [commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [commands={6:0}, global={0:0}, state=0, x={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [commands={6:0}, global={0:0}, state=0, x={-3:0}] [L709] global = x [L710] state = STATE_2 VAL [commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() [L723] RET parse_input("c1") [L724] CALL parse_input("c2") [L692] int i = 0; VAL [commands={6:0}, global={-3:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={-3:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={6:0}, global={-3:0}, i=1, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={-3:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={2:0}, global={-3:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={-3:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={-3:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={-3:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={-3:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={6:0}, global={-3:0}, i=2, input={5:0}, input={5:0}, state=1] [L692] COND FALSE !(i < 2) VAL [commands={6:0}, global={-3:0}, i=2, input={5:0}, input={5:0}, state=1] [L724] RET parse_input("c2") [L725] return 0; VAL [\result=0, commands={6:0}, global={-3:0}, state=1] - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 153 locations, 58 error locations. Started 1 CEGAR loops. OverallTime: 38.3s, OverallIterations: 41, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 15.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14282 SdHoareTripleChecker+Valid, 8.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14282 mSDsluCounter, 18530 SdHoareTripleChecker+Invalid, 6.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3042 IncrementalHoareTripleChecker+Unchecked, 13764 mSDsCounter, 1268 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9811 IncrementalHoareTripleChecker+Invalid, 14121 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1268 mSolverCounterUnsat, 4766 mSDtfsCounter, 9811 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1324 GetRequests, 822 SyntacticMatches, 41 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3994 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=381occurred in iteration=9, InterpolantAutomatonStates: 365, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 40 MinimizatonAttempts, 3349 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 17.8s InterpolantComputationTime, 1834 NumberOfCodeBlocks, 1834 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 2146 ConstructedInterpolants, 288 QuantifiedInterpolants, 32969 SizeOfPredicates, 42 NumberOfNonLiveVariables, 2693 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 63 InterpolantComputations, 29 PerfectInterpolantSequences, 139/246 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-22 16:04:06,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0 --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:04:08,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:04:08,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:04:08,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:04:08,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:04:08,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:04:08,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:04:08,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:04:08,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:04:08,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:04:08,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:04:08,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:04:08,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:04:08,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:04:08,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:04:08,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:04:08,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:04:08,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:04:08,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:04:08,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:04:08,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:04:08,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:04:08,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:04:08,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:04:08,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:04:08,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:04:08,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:04:08,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:04:08,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:04:08,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:04:08,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:04:08,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:04:08,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:04:08,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:04:08,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:04:08,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:04:08,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:04:08,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:04:08,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:04:08,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:04:08,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:04:08,661 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-22 16:04:08,711 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:04:08,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:04:08,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:04:08,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:04:08,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:04:08,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:04:08,718 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:04:08,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:04:08,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:04:08,719 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-22 16:04:08,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:04:08,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:04:08,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:04:08,721 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-22 16:04:08,721 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-22 16:04:08,721 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-22 16:04:08,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:04:08,722 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 16:04:08,722 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-22 16:04:08,722 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-22 16:04:08,723 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:04:08,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:04:08,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:04:08,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:04:08,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:04:08,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:04:08,724 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:04:08,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:04:08,725 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-22 16:04:08,725 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-22 16:04:08,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:04:08,726 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-22 16:04:08,726 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-11-22 16:04:09,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:04:09,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:04:09,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:04:09,178 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:04:09,179 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:04:09,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-22 16:04:09,266 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data/0429864a5/901b043fe6b4463f8af551e54ef65c1e/FLAG4350bad14 [2021-11-22 16:04:10,002 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:04:10,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-22 16:04:10,017 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data/0429864a5/901b043fe6b4463f8af551e54ef65c1e/FLAG4350bad14 [2021-11-22 16:04:10,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/data/0429864a5/901b043fe6b4463f8af551e54ef65c1e [2021-11-22 16:04:10,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:04:10,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:04:10,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:04:10,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:04:10,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:04:10,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:10,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e04bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10, skipping insertion in model container [2021-11-22 16:04:10,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:10,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:04:10,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:04:10,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:04:10,758 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:04:10,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:04:10,890 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:04:10,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10 WrapperNode [2021-11-22 16:04:10,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:04:10,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:04:10,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:04:10,895 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:04:10,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:10,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:10,995 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 8, calls inlined = 14, statements flattened = 206 [2021-11-22 16:04:10,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:04:10,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:04:10,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:04:11,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:04:11,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:11,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:11,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:11,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:11,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:11,067 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:11,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:11,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:04:11,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:04:11,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:04:11,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:04:11,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (1/1) ... [2021-11-22 16:04:11,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:04:11,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:11,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:04:11,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:04:11,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-22 16:04:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 16:04:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:04:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 16:04:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 16:04:11,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-22 16:04:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-22 16:04:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:04:11,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:04:11,342 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:04:11,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:04:12,051 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:04:12,060 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:04:12,061 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 16:04:12,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:04:12 BoogieIcfgContainer [2021-11-22 16:04:12,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:04:12,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:04:12,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:04:12,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:04:12,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:04:10" (1/3) ... [2021-11-22 16:04:12,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ff5ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:04:12, skipping insertion in model container [2021-11-22 16:04:12,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:04:10" (2/3) ... [2021-11-22 16:04:12,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69ff5ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:04:12, skipping insertion in model container [2021-11-22 16:04:12,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:04:12" (3/3) ... [2021-11-22 16:04:12,085 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-11-22 16:04:12,091 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:04:12,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2021-11-22 16:04:12,136 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:04:12,143 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 16:04:12,143 INFO L340 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2021-11-22 16:04:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 94 states have (on average 1.872340425531915) internal successors, (176), 152 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-22 16:04:12,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:12,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-22 16:04:12,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:12,177 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-11-22 16:04:12,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:12,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047409203] [2021-11-22 16:04:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:12,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:12,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:12,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:12,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 16:04:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:12,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:04:12,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:12,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:12,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:12,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047409203] [2021-11-22 16:04:12,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047409203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:12,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:12,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-22 16:04:12,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544095154] [2021-11-22 16:04:12,402 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:12,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:04:12,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:12,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:04:12,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:04:12,439 INFO L87 Difference]: Start difference. First operand has 153 states, 94 states have (on average 1.872340425531915) internal successors, (176), 152 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:12,987 INFO L93 Difference]: Finished difference Result 255 states and 289 transitions. [2021-11-22 16:04:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:04:12,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-22 16:04:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:13,010 INFO L225 Difference]: With dead ends: 255 [2021-11-22 16:04:13,010 INFO L226 Difference]: Without dead ends: 249 [2021-11-22 16:04:13,012 INFO L932 BasicCegarLoop]: 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 [2021-11-22 16:04:13,019 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 357 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:13,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 215 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 16:04:13,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-22 16:04:13,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 158. [2021-11-22 16:04:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 107 states have (on average 1.7009345794392523) internal successors, (182), 157 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 182 transitions. [2021-11-22 16:04:13,071 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 182 transitions. Word has length 4 [2021-11-22 16:04:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:13,072 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 182 transitions. [2021-11-22 16:04:13,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:13,072 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 182 transitions. [2021-11-22 16:04:13,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-22 16:04:13,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:13,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-22 16:04:13,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:13,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:13,287 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:13,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:13,288 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-11-22 16:04:13,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:13,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34367596] [2021-11-22 16:04:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:13,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:13,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:13,297 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:13,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 16:04:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:13,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:04:13,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:13,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:13,759 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:13,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34367596] [2021-11-22 16:04:13,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34367596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:13,760 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:13,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-22 16:04:13,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035403753] [2021-11-22 16:04:13,760 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:13,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:04:13,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:13,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:04:13,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:04:13,762 INFO L87 Difference]: Start difference. First operand 158 states and 182 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:14,711 INFO L93 Difference]: Finished difference Result 371 states and 416 transitions. [2021-11-22 16:04:14,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:04:14,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-22 16:04:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:14,715 INFO L225 Difference]: With dead ends: 371 [2021-11-22 16:04:14,716 INFO L226 Difference]: Without dead ends: 371 [2021-11-22 16:04:14,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:04:14,718 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 582 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:14,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 386 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 16:04:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-22 16:04:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 231. [2021-11-22 16:04:14,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 180 states have (on average 1.6444444444444444) internal successors, (296), 230 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 296 transitions. [2021-11-22 16:04:14,740 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 296 transitions. Word has length 4 [2021-11-22 16:04:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:14,741 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 296 transitions. [2021-11-22 16:04:14,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 296 transitions. [2021-11-22 16:04:14,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-22 16:04:14,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:14,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-22 16:04:14,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:14,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:14,953 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:14,954 INFO L85 PathProgramCache]: Analyzing trace with hash 28698698, now seen corresponding path program 1 times [2021-11-22 16:04:14,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:14,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820824683] [2021-11-22 16:04:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:14,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:14,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:14,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:14,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-22 16:04:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:15,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:04:15,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:15,134 INFO L388 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 15 treesize of output 7 [2021-11-22 16:04:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:15,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:15,225 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:15,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820824683] [2021-11-22 16:04:15,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820824683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:15,225 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:15,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-22 16:04:15,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784643689] [2021-11-22 16:04:15,226 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:15,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:04:15,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:15,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:04:15,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:04:15,228 INFO L87 Difference]: Start difference. First operand 231 states and 296 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:15,961 INFO L93 Difference]: Finished difference Result 473 states and 594 transitions. [2021-11-22 16:04:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:04:15,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-22 16:04:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:15,966 INFO L225 Difference]: With dead ends: 473 [2021-11-22 16:04:15,966 INFO L226 Difference]: Without dead ends: 473 [2021-11-22 16:04:15,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:04:15,968 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 317 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:15,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 617 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:04:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-22 16:04:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 289. [2021-11-22 16:04:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 238 states have (on average 1.6260504201680672) internal successors, (387), 288 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 387 transitions. [2021-11-22 16:04:16,008 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 387 transitions. Word has length 5 [2021-11-22 16:04:16,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:16,008 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 387 transitions. [2021-11-22 16:04:16,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 387 transitions. [2021-11-22 16:04:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-22 16:04:16,010 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:16,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-22 16:04:16,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-22 16:04:16,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:16,211 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:16,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash 889659685, now seen corresponding path program 1 times [2021-11-22 16:04:16,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:16,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200706734] [2021-11-22 16:04:16,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:16,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:16,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:16,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:16,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-22 16:04:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:16,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 16:04:16,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:16,415 INFO L388 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 29 treesize of output 21 [2021-11-22 16:04:16,428 INFO L388 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 18 treesize of output 10 [2021-11-22 16:04:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:16,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:16,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:16,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200706734] [2021-11-22 16:04:16,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200706734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:16,569 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:16,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-22 16:04:16,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465734225] [2021-11-22 16:04:16,570 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:16,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:04:16,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:04:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:04:16,571 INFO L87 Difference]: Start difference. First operand 289 states and 387 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:17,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:17,568 INFO L93 Difference]: Finished difference Result 623 states and 741 transitions. [2021-11-22 16:04:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:04:17,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-11-22 16:04:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:17,572 INFO L225 Difference]: With dead ends: 623 [2021-11-22 16:04:17,573 INFO L226 Difference]: Without dead ends: 623 [2021-11-22 16:04:17,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:04:17,575 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 840 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:17,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [840 Valid, 533 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-22 16:04:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-11-22 16:04:17,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 320. [2021-11-22 16:04:17,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 269 states have (on average 1.5947955390334572) internal successors, (429), 319 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 429 transitions. [2021-11-22 16:04:17,594 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 429 transitions. Word has length 6 [2021-11-22 16:04:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:17,595 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 429 transitions. [2021-11-22 16:04:17,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 429 transitions. [2021-11-22 16:04:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-22 16:04:17,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:17,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:17,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-22 16:04:17,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:17,814 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:17,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1809646508, now seen corresponding path program 1 times [2021-11-22 16:04:17,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:17,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533921639] [2021-11-22 16:04:17,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:17,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:17,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:17,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:17,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-22 16:04:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:04:17,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:17,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:17,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533921639] [2021-11-22 16:04:17,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533921639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:17,955 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:17,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-22 16:04:17,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285439492] [2021-11-22 16:04:17,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:17,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:04:17,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:17,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:04:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:04:17,957 INFO L87 Difference]: Start difference. First operand 320 states and 429 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:18,305 INFO L93 Difference]: Finished difference Result 421 states and 533 transitions. [2021-11-22 16:04:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:04:18,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2021-11-22 16:04:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:18,308 INFO L225 Difference]: With dead ends: 421 [2021-11-22 16:04:18,308 INFO L226 Difference]: Without dead ends: 421 [2021-11-22 16:04:18,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:04:18,310 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 375 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:18,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [375 Valid, 332 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:04:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-22 16:04:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 326. [2021-11-22 16:04:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 276 states have (on average 1.5797101449275361) internal successors, (436), 325 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:18,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 436 transitions. [2021-11-22 16:04:18,323 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 436 transitions. Word has length 7 [2021-11-22 16:04:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:18,323 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 436 transitions. [2021-11-22 16:04:18,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:18,323 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 436 transitions. [2021-11-22 16:04:18,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-22 16:04:18,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:18,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:18,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:18,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:18,536 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:18,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash 264466951, now seen corresponding path program 1 times [2021-11-22 16:04:18,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:18,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250861430] [2021-11-22 16:04:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:18,537 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:18,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:18,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:18,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-22 16:04:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:18,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:04:18,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:18,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:18,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:18,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250861430] [2021-11-22 16:04:18,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250861430] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:18,727 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:18,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-22 16:04:18,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510383877] [2021-11-22 16:04:18,728 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:18,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:04:18,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:04:18,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:04:18,729 INFO L87 Difference]: Start difference. First operand 326 states and 436 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:19,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:19,246 INFO L93 Difference]: Finished difference Result 398 states and 484 transitions. [2021-11-22 16:04:19,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:04:19,249 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-22 16:04:19,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:19,251 INFO L225 Difference]: With dead ends: 398 [2021-11-22 16:04:19,251 INFO L226 Difference]: Without dead ends: 398 [2021-11-22 16:04:19,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:04:19,252 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 510 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:19,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 365 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-22 16:04:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-22 16:04:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 328. [2021-11-22 16:04:19,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 279 states have (on average 1.5591397849462365) internal successors, (435), 327 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:19,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 435 transitions. [2021-11-22 16:04:19,264 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 435 transitions. Word has length 8 [2021-11-22 16:04:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:19,264 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 435 transitions. [2021-11-22 16:04:19,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 435 transitions. [2021-11-22 16:04:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 16:04:19,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:19,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:19,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-22 16:04:19,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:19,476 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:19,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -317713405, now seen corresponding path program 1 times [2021-11-22 16:04:19,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:19,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309915920] [2021-11-22 16:04:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:19,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:19,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:19,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:19,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-22 16:04:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:19,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:04:19,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:19,776 INFO L388 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 15 treesize of output 7 [2021-11-22 16:04:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:19,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:19,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309915920] [2021-11-22 16:04:19,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309915920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:19,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:19,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-22 16:04:19,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811660637] [2021-11-22 16:04:19,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:19,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:04:19,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:19,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:04:19,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:04:19,991 INFO L87 Difference]: Start difference. First operand 328 states and 435 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:21,332 INFO L93 Difference]: Finished difference Result 653 states and 822 transitions. [2021-11-22 16:04:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:04:21,333 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 16:04:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:21,337 INFO L225 Difference]: With dead ends: 653 [2021-11-22 16:04:21,338 INFO L226 Difference]: Without dead ends: 653 [2021-11-22 16:04:21,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:04:21,339 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 395 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:21,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1274 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-22 16:04:21,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-22 16:04:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 357. [2021-11-22 16:04:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 308 states have (on average 1.5487012987012987) internal successors, (477), 356 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 477 transitions. [2021-11-22 16:04:21,358 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 477 transitions. Word has length 13 [2021-11-22 16:04:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:21,358 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 477 transitions. [2021-11-22 16:04:21,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 477 transitions. [2021-11-22 16:04:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 16:04:21,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:21,359 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:21,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:21,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:21,573 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1259180916, now seen corresponding path program 1 times [2021-11-22 16:04:21,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:21,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563912534] [2021-11-22 16:04:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:21,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:21,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:21,575 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:21,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-22 16:04:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 16:04:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:21,913 INFO L388 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 29 treesize of output 21 [2021-11-22 16:04:21,917 INFO L388 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 18 treesize of output 10 [2021-11-22 16:04:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:21,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:22,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:22,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563912534] [2021-11-22 16:04:22,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563912534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:22,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:22,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-22 16:04:22,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253090056] [2021-11-22 16:04:22,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:22,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:04:22,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:04:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:04:22,142 INFO L87 Difference]: Start difference. First operand 357 states and 477 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:24,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:04:27,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:04:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:27,920 INFO L93 Difference]: Finished difference Result 814 states and 970 transitions. [2021-11-22 16:04:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 16:04:27,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-22 16:04:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:27,925 INFO L225 Difference]: With dead ends: 814 [2021-11-22 16:04:27,925 INFO L226 Difference]: Without dead ends: 814 [2021-11-22 16:04:27,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:04:27,926 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 875 mSDsluCounter, 1298 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:27,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 1574 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 610 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-11-22 16:04:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-11-22 16:04:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 364. [2021-11-22 16:04:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 315 states have (on average 1.5365079365079366) internal successors, (484), 363 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 484 transitions. [2021-11-22 16:04:27,940 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 484 transitions. Word has length 14 [2021-11-22 16:04:27,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:27,941 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 484 transitions. [2021-11-22 16:04:27,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 484 transitions. [2021-11-22 16:04:27,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 16:04:27,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:27,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:27,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:28,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:28,162 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash -723310514, now seen corresponding path program 1 times [2021-11-22 16:04:28,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:28,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1134527720] [2021-11-22 16:04:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:28,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:28,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:28,164 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:28,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-22 16:04:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:04:28,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:28,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:28,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:28,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1134527720] [2021-11-22 16:04:28,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1134527720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:28,278 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:28,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 16:04:28,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067142902] [2021-11-22 16:04:28,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:28,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:04:28,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:28,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:04:28,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:28,281 INFO L87 Difference]: Start difference. First operand 364 states and 484 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:28,297 INFO L93 Difference]: Finished difference Result 389 states and 501 transitions. [2021-11-22 16:04:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:04:28,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-22 16:04:28,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:28,300 INFO L225 Difference]: With dead ends: 389 [2021-11-22 16:04:28,300 INFO L226 Difference]: Without dead ends: 389 [2021-11-22 16:04:28,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:28,301 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 84 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:28,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 280 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:04:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-22 16:04:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 264. [2021-11-22 16:04:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 233 states have (on average 1.4892703862660943) internal successors, (347), 263 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:28,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 347 transitions. [2021-11-22 16:04:28,310 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 347 transitions. Word has length 16 [2021-11-22 16:04:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:28,310 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 347 transitions. [2021-11-22 16:04:28,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 347 transitions. [2021-11-22 16:04:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 16:04:28,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:28,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:28,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:28,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:28,523 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash -947142882, now seen corresponding path program 1 times [2021-11-22 16:04:28,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:28,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358739777] [2021-11-22 16:04:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:28,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:28,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:28,527 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:28,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-22 16:04:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:28,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:04:28,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:28,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:28,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:28,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358739777] [2021-11-22 16:04:28,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358739777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:28,764 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:28,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 16:04:28,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843574369] [2021-11-22 16:04:28,765 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:28,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:04:28,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:28,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:04:28,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:28,766 INFO L87 Difference]: Start difference. First operand 264 states and 347 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:28,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:28,803 INFO L93 Difference]: Finished difference Result 302 states and 377 transitions. [2021-11-22 16:04:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:04:28,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 16:04:28,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:28,806 INFO L225 Difference]: With dead ends: 302 [2021-11-22 16:04:28,806 INFO L226 Difference]: Without dead ends: 302 [2021-11-22 16:04:28,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:28,807 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 82 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:28,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 178 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:04:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-22 16:04:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 280. [2021-11-22 16:04:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 253 states have (on average 1.4624505928853755) internal successors, (370), 279 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 370 transitions. [2021-11-22 16:04:28,815 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 370 transitions. Word has length 17 [2021-11-22 16:04:28,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:28,815 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 370 transitions. [2021-11-22 16:04:28,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 370 transitions. [2021-11-22 16:04:28,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-22 16:04:28,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:28,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:28,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:29,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:29,027 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:29,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:29,028 INFO L85 PathProgramCache]: Analyzing trace with hash -441953550, now seen corresponding path program 1 times [2021-11-22 16:04:29,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:29,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086482564] [2021-11-22 16:04:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:29,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:29,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:29,029 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:29,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-22 16:04:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:29,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:04:29,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:29,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:30,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086482564] [2021-11-22 16:04:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086482564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:30,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:30,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-11-22 16:04:30,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690828726] [2021-11-22 16:04:30,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:30,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:04:30,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:30,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:04:30,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:04:30,203 INFO L87 Difference]: Start difference. First operand 280 states and 370 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:31,240 INFO L93 Difference]: Finished difference Result 398 states and 490 transitions. [2021-11-22 16:04:31,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:04:31,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 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 18 [2021-11-22 16:04:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:31,243 INFO L225 Difference]: With dead ends: 398 [2021-11-22 16:04:31,243 INFO L226 Difference]: Without dead ends: 398 [2021-11-22 16:04:31,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:04:31,244 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 588 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:31,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 419 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-22 16:04:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-22 16:04:31,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 295. [2021-11-22 16:04:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 268 states have (on average 1.458955223880597) internal successors, (391), 294 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:31,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 391 transitions. [2021-11-22 16:04:31,267 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 391 transitions. Word has length 18 [2021-11-22 16:04:31,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:31,268 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 391 transitions. [2021-11-22 16:04:31,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:31,268 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 391 transitions. [2021-11-22 16:04:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 16:04:31,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:31,269 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-22 16:04:31,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:31,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:31,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:31,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:31,481 INFO L85 PathProgramCache]: Analyzing trace with hash 486275988, now seen corresponding path program 1 times [2021-11-22 16:04:31,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:31,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465872211] [2021-11-22 16:04:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:31,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:31,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:31,482 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:31,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-22 16:04:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:31,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:04:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:31,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:31,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:31,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:31,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465872211] [2021-11-22 16:04:31,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465872211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:31,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:31,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-22 16:04:31,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813326459] [2021-11-22 16:04:31,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:31,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:04:31,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:04:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:04:31,671 INFO L87 Difference]: Start difference. First operand 295 states and 391 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:31,970 INFO L93 Difference]: Finished difference Result 373 states and 459 transitions. [2021-11-22 16:04:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:04:31,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 16:04:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:31,973 INFO L225 Difference]: With dead ends: 373 [2021-11-22 16:04:31,973 INFO L226 Difference]: Without dead ends: 373 [2021-11-22 16:04:31,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:04:31,974 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 279 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:31,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 722 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:04:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-22 16:04:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 268. [2021-11-22 16:04:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 247 states have (on average 1.4008097165991902) internal successors, (346), 267 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 346 transitions. [2021-11-22 16:04:31,982 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 346 transitions. Word has length 20 [2021-11-22 16:04:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:31,983 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 346 transitions. [2021-11-22 16:04:31,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:31,983 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 346 transitions. [2021-11-22 16:04:31,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-22 16:04:31,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:31,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:32,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:32,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:32,195 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:32,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:32,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1555868704, now seen corresponding path program 1 times [2021-11-22 16:04:32,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:32,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105848600] [2021-11-22 16:04:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:32,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:32,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:32,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:32,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-22 16:04:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-22 16:04:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:32,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:32,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:32,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105848600] [2021-11-22 16:04:32,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105848600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:32,334 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:32,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 16:04:32,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905588027] [2021-11-22 16:04:32,335 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:32,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 16:04:32,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 16:04:32,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:32,336 INFO L87 Difference]: Start difference. First operand 268 states and 346 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:32,352 INFO L93 Difference]: Finished difference Result 219 states and 259 transitions. [2021-11-22 16:04:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 16:04:32,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-22 16:04:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:32,354 INFO L225 Difference]: With dead ends: 219 [2021-11-22 16:04:32,354 INFO L226 Difference]: Without dead ends: 219 [2021-11-22 16:04:32,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 16:04:32,356 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 83 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:32,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 216 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:04:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-22 16:04:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 207. [2021-11-22 16:04:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 186 states have (on average 1.3548387096774193) internal successors, (252), 206 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 252 transitions. [2021-11-22 16:04:32,363 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 252 transitions. Word has length 20 [2021-11-22 16:04:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:32,363 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 252 transitions. [2021-11-22 16:04:32,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 252 transitions. [2021-11-22 16:04:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-22 16:04:32,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:32,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:32,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:32,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:32,576 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:32,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:32,576 INFO L85 PathProgramCache]: Analyzing trace with hash 321116316, now seen corresponding path program 1 times [2021-11-22 16:04:32,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:32,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190568366] [2021-11-22 16:04:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:32,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:32,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:32,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:32,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-22 16:04:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 16:04:32,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:32,959 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:04:32,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-22 16:04:32,975 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-22 16:04:32,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 35 [2021-11-22 16:04:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:33,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:36,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190568366] [2021-11-22 16:04:36,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190568366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:36,152 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:36,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-22 16:04:36,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13524660] [2021-11-22 16:04:36,153 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:36,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:04:36,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:36,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:04:36,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=36, Unknown=1, NotChecked=0, Total=56 [2021-11-22 16:04:36,154 INFO L87 Difference]: Start difference. First operand 207 states and 252 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:37,029 INFO L93 Difference]: Finished difference Result 380 states and 444 transitions. [2021-11-22 16:04:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-22 16:04:37,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-22 16:04:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:37,031 INFO L225 Difference]: With dead ends: 380 [2021-11-22 16:04:37,032 INFO L226 Difference]: Without dead ends: 380 [2021-11-22 16:04:37,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=38, Invalid=71, Unknown=1, NotChecked=0, Total=110 [2021-11-22 16:04:37,032 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 448 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:37,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 378 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 259 Unchecked, 0.6s Time] [2021-11-22 16:04:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-22 16:04:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 266. [2021-11-22 16:04:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 245 states have (on average 1.3428571428571427) internal successors, (329), 265 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 329 transitions. [2021-11-22 16:04:37,040 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 329 transitions. Word has length 22 [2021-11-22 16:04:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:37,041 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 329 transitions. [2021-11-22 16:04:37,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 329 transitions. [2021-11-22 16:04:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 16:04:37,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:37,044 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:04:37,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:37,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:37,257 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:37,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash -955921151, now seen corresponding path program 1 times [2021-11-22 16:04:37,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:37,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508637425] [2021-11-22 16:04:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:37,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:37,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:37,260 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:37,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-22 16:04:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:37,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:04:37,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:37,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:37,541 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:37,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508637425] [2021-11-22 16:04:37,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508637425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:37,541 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:37,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-22 16:04:37,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604173040] [2021-11-22 16:04:37,541 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:37,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:04:37,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:04:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:04:37,542 INFO L87 Difference]: Start difference. First operand 266 states and 329 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:37,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:37,834 INFO L93 Difference]: Finished difference Result 309 states and 363 transitions. [2021-11-22 16:04:37,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:04:37,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 16:04:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:37,837 INFO L225 Difference]: With dead ends: 309 [2021-11-22 16:04:37,837 INFO L226 Difference]: Without dead ends: 309 [2021-11-22 16:04:37,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:04:37,838 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 204 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:37,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 177 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:04:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-22 16:04:37,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 265. [2021-11-22 16:04:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 245 states have (on average 1.3265306122448979) internal successors, (325), 264 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 325 transitions. [2021-11-22 16:04:37,848 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 325 transitions. Word has length 23 [2021-11-22 16:04:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:37,849 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 325 transitions. [2021-11-22 16:04:37,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 325 transitions. [2021-11-22 16:04:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 16:04:37,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:37,853 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:04:37,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:38,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:38,064 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash 431215531, now seen corresponding path program 1 times [2021-11-22 16:04:38,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:38,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198559943] [2021-11-22 16:04:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:38,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:38,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:38,067 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:38,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-22 16:04:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:38,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:04:38,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:38,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:38,364 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:38,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198559943] [2021-11-22 16:04:38,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198559943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:38,364 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:38,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-22 16:04:38,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322944332] [2021-11-22 16:04:38,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:38,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:04:38,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:38,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:04:38,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:04:38,365 INFO L87 Difference]: Start difference. First operand 265 states and 325 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:38,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:38,739 INFO L93 Difference]: Finished difference Result 281 states and 331 transitions. [2021-11-22 16:04:38,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:04:38,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-22 16:04:38,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:38,741 INFO L225 Difference]: With dead ends: 281 [2021-11-22 16:04:38,741 INFO L226 Difference]: Without dead ends: 281 [2021-11-22 16:04:38,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:04:38,742 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 250 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:38,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 210 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:04:38,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-22 16:04:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 264. [2021-11-22 16:04:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 245 states have (on average 1.310204081632653) internal successors, (321), 263 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 321 transitions. [2021-11-22 16:04:38,750 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 321 transitions. Word has length 24 [2021-11-22 16:04:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:38,751 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 321 transitions. [2021-11-22 16:04:38,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 321 transitions. [2021-11-22 16:04:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 16:04:38,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:38,752 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:04:38,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-22 16:04:38,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:38,964 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:38,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1193149375, now seen corresponding path program 1 times [2021-11-22 16:04:38,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:38,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090247753] [2021-11-22 16:04:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:38,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:38,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:38,966 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:38,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-22 16:04:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 16:04:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:39,413 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:04:39,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-11-22 16:04:39,431 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-22 16:04:39,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-11-22 16:04:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:39,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:43,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:43,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090247753] [2021-11-22 16:04:43,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090247753] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:43,670 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:43,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-22 16:04:43,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699057198] [2021-11-22 16:04:43,670 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:43,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:04:43,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:04:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=36, Unknown=1, NotChecked=0, Total=56 [2021-11-22 16:04:43,671 INFO L87 Difference]: Start difference. First operand 264 states and 321 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:44,783 INFO L93 Difference]: Finished difference Result 357 states and 417 transitions. [2021-11-22 16:04:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:04:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-22 16:04:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:44,786 INFO L225 Difference]: With dead ends: 357 [2021-11-22 16:04:44,786 INFO L226 Difference]: Without dead ends: 357 [2021-11-22 16:04:44,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=38, Invalid=71, Unknown=1, NotChecked=0, Total=110 [2021-11-22 16:04:44,787 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 403 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:44,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 313 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 145 Unchecked, 0.8s Time] [2021-11-22 16:04:44,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-22 16:04:44,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 278. [2021-11-22 16:04:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 259 states have (on average 1.3011583011583012) internal successors, (337), 277 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 337 transitions. [2021-11-22 16:04:44,796 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 337 transitions. Word has length 28 [2021-11-22 16:04:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:44,796 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 337 transitions. [2021-11-22 16:04:44,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:44,796 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 337 transitions. [2021-11-22 16:04:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 16:04:44,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:44,797 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:44,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-22 16:04:45,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:45,009 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:45,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1787726333, now seen corresponding path program 1 times [2021-11-22 16:04:45,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:45,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29679499] [2021-11-22 16:04:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:45,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:45,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:45,012 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:45,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-22 16:04:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:45,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:04:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:45,573 INFO L388 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 18 treesize of output 10 [2021-11-22 16:04:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:45,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:46,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:46,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29679499] [2021-11-22 16:04:46,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29679499] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:46,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:46,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-22 16:04:46,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906542362] [2021-11-22 16:04:46,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:46,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:04:46,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:46,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:04:46,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:04:46,005 INFO L87 Difference]: Start difference. First operand 278 states and 337 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:46,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:46,695 INFO L93 Difference]: Finished difference Result 251 states and 291 transitions. [2021-11-22 16:04:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:04:46,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 16:04:46,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:46,698 INFO L225 Difference]: With dead ends: 251 [2021-11-22 16:04:46,698 INFO L226 Difference]: Without dead ends: 251 [2021-11-22 16:04:46,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:04:46,699 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 198 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:46,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 570 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:04:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-22 16:04:46,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 236. [2021-11-22 16:04:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 217 states have (on average 1.2903225806451613) internal successors, (280), 235 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2021-11-22 16:04:46,707 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 30 [2021-11-22 16:04:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:46,707 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2021-11-22 16:04:46,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2021-11-22 16:04:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 16:04:46,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:46,708 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:04:46,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:46,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:46,923 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:46,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:46,923 INFO L85 PathProgramCache]: Analyzing trace with hash 139720546, now seen corresponding path program 1 times [2021-11-22 16:04:46,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:46,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722562266] [2021-11-22 16:04:46,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:46,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:46,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:46,925 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:46,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-22 16:04:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:47,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:04:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:47,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:47,414 INFO L388 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 36 treesize of output 32 [2021-11-22 16:04:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:48,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:48,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722562266] [2021-11-22 16:04:48,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722562266] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:48,698 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:48,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-22 16:04:48,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381279058] [2021-11-22 16:04:48,698 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:48,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:04:48,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:04:48,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:04:48,700 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:49,547 INFO L93 Difference]: Finished difference Result 321 states and 365 transitions. [2021-11-22 16:04:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:04:49,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 16:04:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:49,550 INFO L225 Difference]: With dead ends: 321 [2021-11-22 16:04:49,550 INFO L226 Difference]: Without dead ends: 321 [2021-11-22 16:04:49,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:04:49,550 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 405 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:49,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 203 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:04:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-22 16:04:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 239. [2021-11-22 16:04:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 222 states have (on average 1.2792792792792793) internal successors, (284), 238 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 284 transitions. [2021-11-22 16:04:49,558 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 284 transitions. Word has length 30 [2021-11-22 16:04:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:49,558 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 284 transitions. [2021-11-22 16:04:49,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 284 transitions. [2021-11-22 16:04:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 16:04:49,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:49,560 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:49,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:49,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:49,773 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash 141596739, now seen corresponding path program 1 times [2021-11-22 16:04:49,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:49,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182162718] [2021-11-22 16:04:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:49,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:49,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:49,774 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:49,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-22 16:04:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:04:49,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:50,244 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:04:50,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-11-22 16:04:50,263 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-22 16:04:50,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-11-22 16:04:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:50,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:54,675 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182162718] [2021-11-22 16:04:54,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182162718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:54,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:54,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-22 16:04:54,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970091305] [2021-11-22 16:04:54,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:54,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:04:54,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:04:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2021-11-22 16:04:54,677 INFO L87 Difference]: Start difference. First operand 239 states and 284 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:56,322 INFO L93 Difference]: Finished difference Result 330 states and 376 transitions. [2021-11-22 16:04:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:04:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 16:04:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:56,324 INFO L225 Difference]: With dead ends: 330 [2021-11-22 16:04:56,325 INFO L226 Difference]: Without dead ends: 330 [2021-11-22 16:04:56,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=66, Invalid=143, Unknown=1, NotChecked=0, Total=210 [2021-11-22 16:04:56,326 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 567 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:56,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 364 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 144 Invalid, 0 Unknown, 249 Unchecked, 1.0s Time] [2021-11-22 16:04:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-22 16:04:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 235. [2021-11-22 16:04:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 218 states have (on average 1.2844036697247707) internal successors, (280), 234 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 280 transitions. [2021-11-22 16:04:56,333 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 280 transitions. Word has length 30 [2021-11-22 16:04:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:56,334 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 280 transitions. [2021-11-22 16:04:56,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 280 transitions. [2021-11-22 16:04:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 16:04:56,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:56,335 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:56,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-22 16:04:56,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:04:56,548 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:04:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:56,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1129092518, now seen corresponding path program 1 times [2021-11-22 16:04:56,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:04:56,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174091601] [2021-11-22 16:04:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:56,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:04:56,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:04:56,551 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:04:56,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-22 16:04:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 16:04:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:57,008 INFO L388 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 22 treesize of output 10 [2021-11-22 16:04:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:57,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:57,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:04:57,397 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-22 16:04:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:58,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:04:58,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174091601] [2021-11-22 16:04:58,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174091601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:58,356 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:58,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-22 16:04:58,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373601897] [2021-11-22 16:04:58,356 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:58,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 16:04:58,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:04:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 16:04:58,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:04:58,358 INFO L87 Difference]: Start difference. First operand 235 states and 280 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:04,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:05:09,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:05:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:09,544 INFO L93 Difference]: Finished difference Result 313 states and 357 transitions. [2021-11-22 16:05:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:05:09,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-22 16:05:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:09,554 INFO L225 Difference]: With dead ends: 313 [2021-11-22 16:05:09,554 INFO L226 Difference]: Without dead ends: 313 [2021-11-22 16:05:09,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:05:09,555 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 704 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 47 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:09,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1002 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 238 Invalid, 2 Unknown, 125 Unchecked, 4.8s Time] [2021-11-22 16:05:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-22 16:05:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 231. [2021-11-22 16:05:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 215 states have (on average 1.2697674418604652) internal successors, (273), 230 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 273 transitions. [2021-11-22 16:05:09,563 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 273 transitions. Word has length 32 [2021-11-22 16:05:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:09,563 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 273 transitions. [2021-11-22 16:05:09,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 273 transitions. [2021-11-22 16:05:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-22 16:05:09,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:09,565 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:05:09,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-22 16:05:09,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:09,779 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:09,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1364485886, now seen corresponding path program 1 times [2021-11-22 16:05:09,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:09,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59570531] [2021-11-22 16:05:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:09,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:09,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:09,781 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:09,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-22 16:05:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 16:05:09,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:10,331 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:05:10,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-22 16:05:10,352 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:05:10,352 INFO L388 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 25 treesize of output 21 [2021-11-22 16:05:10,978 INFO L388 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 29 treesize of output 21 [2021-11-22 16:05:10,984 INFO L388 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 18 treesize of output 10 [2021-11-22 16:05:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:11,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:13,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:13,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59570531] [2021-11-22 16:05:13,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59570531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:05:13,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:05:13,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-22 16:05:13,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44210828] [2021-11-22 16:05:13,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:05:13,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 16:05:13,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 16:05:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2021-11-22 16:05:13,644 INFO L87 Difference]: Start difference. First operand 231 states and 273 transitions. Second operand has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:15,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:05:18,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:05:18,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:18,902 INFO L93 Difference]: Finished difference Result 281 states and 327 transitions. [2021-11-22 16:05:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 16:05:18,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-22 16:05:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:18,905 INFO L225 Difference]: With dead ends: 281 [2021-11-22 16:05:18,905 INFO L226 Difference]: Without dead ends: 281 [2021-11-22 16:05:18,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=89, Invalid=252, Unknown=1, NotChecked=0, Total=342 [2021-11-22 16:05:18,906 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 223 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:18,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 550 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 195 Invalid, 2 Unknown, 252 Unchecked, 4.8s Time] [2021-11-22 16:05:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-22 16:05:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 230. [2021-11-22 16:05:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 215 states have (on average 1.2651162790697674) internal successors, (272), 229 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 272 transitions. [2021-11-22 16:05:18,913 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 272 transitions. Word has length 32 [2021-11-22 16:05:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:18,914 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 272 transitions. [2021-11-22 16:05:18,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 272 transitions. [2021-11-22 16:05:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 16:05:18,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:18,915 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:05:18,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-22 16:05:19,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:19,130 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:19,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:19,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1533677601, now seen corresponding path program 1 times [2021-11-22 16:05:19,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:19,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888353330] [2021-11-22 16:05:19,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:19,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:19,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:19,132 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:19,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-22 16:05:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:19,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:05:19,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:19,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:19,402 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:19,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888353330] [2021-11-22 16:05:19,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888353330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:05:19,402 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:05:19,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 16:05:19,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673292071] [2021-11-22 16:05:19,403 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:05:19,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:05:19,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:19,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:05:19,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:05:19,405 INFO L87 Difference]: Start difference. First operand 230 states and 272 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:19,472 INFO L93 Difference]: Finished difference Result 238 states and 277 transitions. [2021-11-22 16:05:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:05:19,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 16:05:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:19,474 INFO L225 Difference]: With dead ends: 238 [2021-11-22 16:05:19,474 INFO L226 Difference]: Without dead ends: 238 [2021-11-22 16:05:19,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:05:19,475 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 147 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:19,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 189 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:05:19,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-22 16:05:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 228. [2021-11-22 16:05:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 215 states have (on average 1.255813953488372) internal successors, (270), 227 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 270 transitions. [2021-11-22 16:05:19,482 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 270 transitions. Word has length 35 [2021-11-22 16:05:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:19,482 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 270 transitions. [2021-11-22 16:05:19,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 270 transitions. [2021-11-22 16:05:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 16:05:19,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:19,484 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:05:19,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-22 16:05:19,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:19,698 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash 299365564, now seen corresponding path program 1 times [2021-11-22 16:05:19,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:19,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148543388] [2021-11-22 16:05:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:19,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:19,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:19,699 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:19,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-22 16:05:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:19,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:05:19,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:20,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:20,278 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:20,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148543388] [2021-11-22 16:05:20,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148543388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:05:20,279 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:05:20,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-22 16:05:20,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878745709] [2021-11-22 16:05:20,279 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:05:20,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:05:20,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:20,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:05:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:05:20,281 INFO L87 Difference]: Start difference. First operand 228 states and 270 transitions. Second operand has 7 states, 6 states have (on average 12.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:20,490 INFO L93 Difference]: Finished difference Result 229 states and 264 transitions. [2021-11-22 16:05:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:05:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 16:05:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:20,492 INFO L225 Difference]: With dead ends: 229 [2021-11-22 16:05:20,492 INFO L226 Difference]: Without dead ends: 229 [2021-11-22 16:05:20,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:05:20,493 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 230 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:20,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 299 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:05:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-22 16:05:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 218. [2021-11-22 16:05:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 207 states have (on average 1.2367149758454106) internal successors, (256), 217 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 256 transitions. [2021-11-22 16:05:20,498 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 256 transitions. Word has length 36 [2021-11-22 16:05:20,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:20,499 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 256 transitions. [2021-11-22 16:05:20,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.0) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 256 transitions. [2021-11-22 16:05:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 16:05:20,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:20,500 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:05:20,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-22 16:05:20,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:20,715 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:20,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash -845929816, now seen corresponding path program 1 times [2021-11-22 16:05:20,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:20,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160551223] [2021-11-22 16:05:20,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:20,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:20,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:20,716 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:20,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-22 16:05:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:20,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:05:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:21,216 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:05:21,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-11-22 16:05:21,236 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-22 16:05:21,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 35 [2021-11-22 16:05:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:21,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:25,921 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:25,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160551223] [2021-11-22 16:05:25,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160551223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:05:25,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:05:25,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-22 16:05:25,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257841737] [2021-11-22 16:05:25,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:05:25,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:05:25,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:25,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:05:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2021-11-22 16:05:25,924 INFO L87 Difference]: Start difference. First operand 218 states and 256 transitions. Second operand has 10 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:29,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:05:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:30,126 INFO L93 Difference]: Finished difference Result 320 states and 362 transitions. [2021-11-22 16:05:30,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 16:05:30,127 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-22 16:05:30,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:30,129 INFO L225 Difference]: With dead ends: 320 [2021-11-22 16:05:30,129 INFO L226 Difference]: Without dead ends: 320 [2021-11-22 16:05:30,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=63, Invalid=146, Unknown=1, NotChecked=0, Total=210 [2021-11-22 16:05:30,130 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 343 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:30,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 406 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 115 Invalid, 1 Unknown, 177 Unchecked, 3.6s Time] [2021-11-22 16:05:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-22 16:05:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-11-22 16:05:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 207 states have (on average 1.2318840579710144) internal successors, (255), 216 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:30,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 255 transitions. [2021-11-22 16:05:30,137 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 255 transitions. Word has length 36 [2021-11-22 16:05:30,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:30,137 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 255 transitions. [2021-11-22 16:05:30,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:30,138 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 255 transitions. [2021-11-22 16:05:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-22 16:05:30,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:30,139 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:05:30,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-22 16:05:30,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:30,351 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash 690398083, now seen corresponding path program 1 times [2021-11-22 16:05:30,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:30,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048236297] [2021-11-22 16:05:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:30,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:30,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:30,354 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:30,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-22 16:05:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:05:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:30,472 INFO L388 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 [2021-11-22 16:05:30,572 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-22 16:05:30,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-11-22 16:05:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:30,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:30,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048236297] [2021-11-22 16:05:30,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048236297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:05:30,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:05:30,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-22 16:05:30,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898043230] [2021-11-22 16:05:30,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:05:30,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:05:30,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:30,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:05:30,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:05:30,715 INFO L87 Difference]: Start difference. First operand 217 states and 255 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:31,081 INFO L93 Difference]: Finished difference Result 245 states and 282 transitions. [2021-11-22 16:05:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:05:31,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-22 16:05:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:31,083 INFO L225 Difference]: With dead ends: 245 [2021-11-22 16:05:31,083 INFO L226 Difference]: Without dead ends: 245 [2021-11-22 16:05:31,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:05:31,084 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 109 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:31,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 214 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:05:31,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-22 16:05:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 230. [2021-11-22 16:05:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 221 states have (on average 1.2352941176470589) internal successors, (273), 229 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:31,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 273 transitions. [2021-11-22 16:05:31,090 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 273 transitions. Word has length 37 [2021-11-22 16:05:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:31,091 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 273 transitions. [2021-11-22 16:05:31,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 273 transitions. [2021-11-22 16:05:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 16:05:31,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:31,092 INFO L514 BasicCegarLoop]: 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, 1, 1] [2021-11-22 16:05:31,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-22 16:05:31,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:31,307 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:31,307 INFO L85 PathProgramCache]: Analyzing trace with hash 476300630, now seen corresponding path program 1 times [2021-11-22 16:05:31,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:31,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111317151] [2021-11-22 16:05:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:31,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:31,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:31,308 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:31,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-22 16:05:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 16:05:31,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:31,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:31,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:31,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111317151] [2021-11-22 16:05:31,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111317151] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:05:31,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:05:31,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-22 16:05:31,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770412789] [2021-11-22 16:05:31,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:05:31,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:05:31,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:31,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:05:31,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:05:31,676 INFO L87 Difference]: Start difference. First operand 230 states and 273 transitions. Second operand has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:32,012 INFO L93 Difference]: Finished difference Result 251 states and 281 transitions. [2021-11-22 16:05:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:05:32,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-22 16:05:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:32,014 INFO L225 Difference]: With dead ends: 251 [2021-11-22 16:05:32,014 INFO L226 Difference]: Without dead ends: 251 [2021-11-22 16:05:32,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:05:32,015 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 153 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:32,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 162 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 16:05:32,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-22 16:05:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 230. [2021-11-22 16:05:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 221 states have (on average 1.2171945701357465) internal successors, (269), 229 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 269 transitions. [2021-11-22 16:05:32,021 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 269 transitions. Word has length 39 [2021-11-22 16:05:32,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:32,022 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 269 transitions. [2021-11-22 16:05:32,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:32,022 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 269 transitions. [2021-11-22 16:05:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-22 16:05:32,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:32,023 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-11-22 16:05:32,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-22 16:05:32,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:32,224 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:32,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1880417871, now seen corresponding path program 1 times [2021-11-22 16:05:32,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:32,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127678702] [2021-11-22 16:05:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:32,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:32,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:32,227 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:32,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-22 16:05:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:32,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:05:32,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:32,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:32,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:32,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127678702] [2021-11-22 16:05:32,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127678702] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:05:32,796 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:05:32,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-22 16:05:32,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919764362] [2021-11-22 16:05:32,797 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:05:32,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:05:32,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:05:32,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:05:32,798 INFO L87 Difference]: Start difference. First operand 230 states and 269 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:33,262 INFO L93 Difference]: Finished difference Result 243 states and 276 transitions. [2021-11-22 16:05:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:05:33,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-22 16:05:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:33,264 INFO L225 Difference]: With dead ends: 243 [2021-11-22 16:05:33,265 INFO L226 Difference]: Without dead ends: 243 [2021-11-22 16:05:33,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:05:33,265 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 199 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:33,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 209 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 16:05:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-22 16:05:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2021-11-22 16:05:33,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 221 states have (on average 1.1945701357466063) internal successors, (264), 228 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 264 transitions. [2021-11-22 16:05:33,271 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 264 transitions. Word has length 40 [2021-11-22 16:05:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:33,271 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 264 transitions. [2021-11-22 16:05:33,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 264 transitions. [2021-11-22 16:05:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 16:05:33,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:33,273 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-22 16:05:33,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-22 16:05:33,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:33,483 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:33,483 INFO L85 PathProgramCache]: Analyzing trace with hash 908584562, now seen corresponding path program 1 times [2021-11-22 16:05:33,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:33,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258168561] [2021-11-22 16:05:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:33,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:33,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:33,484 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:33,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-22 16:05:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:33,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 16:05:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:33,783 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:05:33,784 INFO L388 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 14 treesize of output 14 [2021-11-22 16:05:33,989 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-22 16:05:33,989 INFO L388 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 22 treesize of output 29 [2021-11-22 16:05:34,208 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-11-22 16:05:34,208 INFO L388 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 3 case distinctions, treesize of input 34 treesize of output 49 [2021-11-22 16:05:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:34,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:38,458 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-22 16:05:38,458 INFO L388 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 47 treesize of output 44 [2021-11-22 16:05:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:38,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:38,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258168561] [2021-11-22 16:05:38,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258168561] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:05:38,661 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:05:38,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 11 [2021-11-22 16:05:38,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309452870] [2021-11-22 16:05:38,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:05:38,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 16:05:38,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 16:05:38,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=110, Unknown=2, NotChecked=0, Total=156 [2021-11-22 16:05:38,663 INFO L87 Difference]: Start difference. First operand 229 states and 264 transitions. Second operand has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:39,458 INFO L93 Difference]: Finished difference Result 284 states and 314 transitions. [2021-11-22 16:05:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 16:05:39,459 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-22 16:05:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:39,460 INFO L225 Difference]: With dead ends: 284 [2021-11-22 16:05:39,460 INFO L226 Difference]: Without dead ends: 284 [2021-11-22 16:05:39,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=98, Invalid=242, Unknown=2, NotChecked=0, Total=342 [2021-11-22 16:05:39,461 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 270 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:39,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 556 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 219 Invalid, 0 Unknown, 165 Unchecked, 0.6s Time] [2021-11-22 16:05:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-22 16:05:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 228. [2021-11-22 16:05:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 221 states have (on average 1.1900452488687783) internal successors, (263), 227 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 263 transitions. [2021-11-22 16:05:39,468 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 263 transitions. Word has length 43 [2021-11-22 16:05:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:39,468 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 263 transitions. [2021-11-22 16:05:39,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 263 transitions. [2021-11-22 16:05:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 16:05:39,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:39,470 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1] [2021-11-22 16:05:39,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-22 16:05:39,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:39,698 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:39,698 INFO L85 PathProgramCache]: Analyzing trace with hash 908584563, now seen corresponding path program 1 times [2021-11-22 16:05:39,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:39,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209587506] [2021-11-22 16:05:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:39,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:39,700 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:39,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-22 16:05:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 16:05:39,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:40,083 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:05:40,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-22 16:05:40,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:05:40,092 INFO L388 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 25 treesize of output 21 [2021-11-22 16:05:40,579 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-22 16:05:40,580 INFO L388 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 3 case distinctions, treesize of input 32 treesize of output 37 [2021-11-22 16:05:40,589 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:05:40,589 INFO L388 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 31 treesize of output 27 [2021-11-22 16:05:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:40,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:43,816 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-22 16:05:43,817 INFO L388 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 34 treesize of output 33 [2021-11-22 16:05:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:48,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:48,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209587506] [2021-11-22 16:05:48,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209587506] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:05:48,553 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:05:48,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 7 [2021-11-22 16:05:48,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886166041] [2021-11-22 16:05:48,554 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:05:48,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-22 16:05:48,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:48,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-22 16:05:48,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=46, Unknown=1, NotChecked=0, Total=72 [2021-11-22 16:05:48,555 INFO L87 Difference]: Start difference. First operand 228 states and 263 transitions. Second operand has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:05:49,029 INFO L93 Difference]: Finished difference Result 287 states and 324 transitions. [2021-11-22 16:05:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:05:49,030 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-22 16:05:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:05:49,032 INFO L225 Difference]: With dead ends: 287 [2021-11-22 16:05:49,032 INFO L226 Difference]: Without dead ends: 287 [2021-11-22 16:05:49,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=48, Invalid=83, Unknown=1, NotChecked=0, Total=132 [2021-11-22 16:05:49,033 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 136 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:05:49,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 364 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2021-11-22 16:05:49,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-22 16:05:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 228. [2021-11-22 16:05:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 221 states have (on average 1.1855203619909502) internal successors, (262), 227 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 262 transitions. [2021-11-22 16:05:49,039 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 262 transitions. Word has length 43 [2021-11-22 16:05:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:05:49,040 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 262 transitions. [2021-11-22 16:05:49,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:05:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 262 transitions. [2021-11-22 16:05:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-22 16:05:49,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:05:49,041 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:05:49,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-22 16:05:49,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:05:49,255 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:05:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:05:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1898649489, now seen corresponding path program 1 times [2021-11-22 16:05:49,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:05:49,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045824553] [2021-11-22 16:05:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:05:49,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:05:49,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:05:49,256 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:05:49,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-22 16:05:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:05:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 16:05:49,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:05:49,561 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:05:49,562 INFO L388 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 13 treesize of output 13 [2021-11-22 16:05:49,966 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-22 16:05:49,966 INFO L388 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 30 treesize of output 41 [2021-11-22 16:05:50,286 INFO L354 Elim1Store]: treesize reduction 42, result has 37.3 percent of original size [2021-11-22 16:05:50,286 INFO L388 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 3 case distinctions, treesize of input 53 treesize of output 68 [2021-11-22 16:05:50,737 INFO L388 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 47 treesize of output 35 [2021-11-22 16:05:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:50,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:05:59,291 INFO L354 Elim1Store]: treesize reduction -1, result has 103.0 percent of original size [2021-11-22 16:05:59,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 123 [2021-11-22 16:05:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:05:59,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:05:59,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045824553] [2021-11-22 16:05:59,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045824553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:05:59,863 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:05:59,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 9] imperfect sequences [] total 19 [2021-11-22 16:05:59,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546295112] [2021-11-22 16:05:59,864 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:05:59,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-22 16:05:59,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:05:59,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-22 16:05:59,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=343, Unknown=4, NotChecked=0, Total=420 [2021-11-22 16:05:59,865 INFO L87 Difference]: Start difference. First operand 228 states and 262 transitions. Second operand has 21 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:06:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:06:32,062 INFO L93 Difference]: Finished difference Result 287 states and 318 transitions. [2021-11-22 16:06:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 16:06:32,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-22 16:06:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:06:32,065 INFO L225 Difference]: With dead ends: 287 [2021-11-22 16:06:32,065 INFO L226 Difference]: Without dead ends: 287 [2021-11-22 16:06:32,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 71 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=217, Invalid=709, Unknown=4, NotChecked=0, Total=930 [2021-11-22 16:06:32,066 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 947 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-22 16:06:32,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 701 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 528 Invalid, 0 Unknown, 393 Unchecked, 1.3s Time] [2021-11-22 16:06:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-22 16:06:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 228. [2021-11-22 16:06:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 221 states have (on average 1.1809954751131222) internal successors, (261), 227 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:06:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 261 transitions. [2021-11-22 16:06:32,072 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 261 transitions. Word has length 44 [2021-11-22 16:06:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:06:32,073 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 261 transitions. [2021-11-22 16:06:32,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:06:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 261 transitions. [2021-11-22 16:06:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-22 16:06:32,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:06:32,074 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:06:32,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-22 16:06:32,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:06:32,279 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:06:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:06:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1271408210, now seen corresponding path program 1 times [2021-11-22 16:06:32,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:06:32,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142869481] [2021-11-22 16:06:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:06:32,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:06:32,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:06:32,283 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:06:32,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-22 16:06:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:06:32,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 16:06:32,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:06:32,761 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:06:32,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-22 16:06:33,600 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-22 16:06:33,601 INFO L388 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 42 treesize of output 42 [2021-11-22 16:06:33,648 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-22 16:06:33,648 INFO L388 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 3 case distinctions, treesize of input 29 treesize of output 34 [2021-11-22 16:06:34,021 INFO L388 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 21 treesize of output 20 [2021-11-22 16:06:34,701 INFO L388 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 42 treesize of output 30 [2021-11-22 16:06:34,705 INFO L388 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 27 treesize of output 19 [2021-11-22 16:06:34,844 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:06:34,845 INFO L388 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 29 treesize of output 29 [2021-11-22 16:06:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:06:34,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:06:35,327 INFO L388 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 25 treesize of output 19 [2021-11-22 16:06:37,805 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-22 16:06:37,806 INFO L388 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 34 treesize of output 33 [2021-11-22 16:06:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:06:42,000 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:06:42,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142869481] [2021-11-22 16:06:42,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142869481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:06:42,001 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:06:42,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 21 [2021-11-22 16:06:42,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035444789] [2021-11-22 16:06:42,001 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:06:42,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 16:06:42,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:06:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 16:06:42,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=381, Unknown=2, NotChecked=0, Total=506 [2021-11-22 16:06:42,003 INFO L87 Difference]: Start difference. First operand 228 states and 261 transitions. Second operand has 23 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:06:49,796 WARN L227 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:06:56,423 WARN L227 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:06:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:06:59,194 INFO L93 Difference]: Finished difference Result 413 states and 458 transitions. [2021-11-22 16:06:59,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-22 16:06:59,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-22 16:06:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:06:59,196 INFO L225 Difference]: With dead ends: 413 [2021-11-22 16:06:59,197 INFO L226 Difference]: Without dead ends: 413 [2021-11-22 16:06:59,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=629, Invalid=1919, Unknown=2, NotChecked=0, Total=2550 [2021-11-22 16:06:59,198 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 666 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:06:59,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 844 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 555 Invalid, 0 Unknown, 598 Unchecked, 1.8s Time] [2021-11-22 16:06:59,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-22 16:06:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 228. [2021-11-22 16:06:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 221 states have (on average 1.1764705882352942) internal successors, (260), 227 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:06:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 260 transitions. [2021-11-22 16:06:59,204 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 260 transitions. Word has length 45 [2021-11-22 16:06:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:06:59,204 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 260 transitions. [2021-11-22 16:06:59,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.090909090909091) internal successors, (90), 22 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:06:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 260 transitions. [2021-11-22 16:06:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-22 16:06:59,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:06:59,206 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:06:59,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-22 16:06:59,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:06:59,407 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:06:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:06:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash 758949073, now seen corresponding path program 1 times [2021-11-22 16:06:59,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:06:59,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163735919] [2021-11-22 16:06:59,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:06:59,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:06:59,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:06:59,409 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:06:59,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-22 16:06:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:06:59,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:06:59,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:06:59,684 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-22 16:06:59,684 INFO L388 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 32 [2021-11-22 16:07:00,152 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-22 16:07:00,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 58 [2021-11-22 16:07:00,652 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-22 16:07:00,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 88 [2021-11-22 16:07:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:07:01,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:07:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:07:04,549 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:07:04,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163735919] [2021-11-22 16:07:04,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163735919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:07:04,550 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:07:04,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-22 16:07:04,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964973303] [2021-11-22 16:07:04,550 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:07:04,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 16:07:04,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:07:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 16:07:04,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=108, Unknown=1, NotChecked=0, Total=156 [2021-11-22 16:07:04,551 INFO L87 Difference]: Start difference. First operand 228 states and 260 transitions. Second operand has 13 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:04,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:07:04,888 INFO L93 Difference]: Finished difference Result 239 states and 270 transitions. [2021-11-22 16:07:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:07:04,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-22 16:07:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:07:04,890 INFO L225 Difference]: With dead ends: 239 [2021-11-22 16:07:04,890 INFO L226 Difference]: Without dead ends: 239 [2021-11-22 16:07:04,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=81, Invalid=190, Unknown=1, NotChecked=0, Total=272 [2021-11-22 16:07:04,891 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 140 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:07:04,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 444 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2021-11-22 16:07:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-22 16:07:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 227. [2021-11-22 16:07:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.1719457013574661) internal successors, (259), 226 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 259 transitions. [2021-11-22 16:07:04,896 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 259 transitions. Word has length 46 [2021-11-22 16:07:04,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:07:04,896 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 259 transitions. [2021-11-22 16:07:04,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:04,897 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 259 transitions. [2021-11-22 16:07:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-22 16:07:04,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:07:04,898 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:07:04,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-22 16:07:05,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:07:05,111 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:07:05,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:07:05,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1279091495, now seen corresponding path program 1 times [2021-11-22 16:07:05,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:07:05,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413070391] [2021-11-22 16:07:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:07:05,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:07:05,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:07:05,112 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:07:05,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-22 16:07:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:07:05,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:07:05,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:07:05,584 INFO L388 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 40 treesize of output 28 [2021-11-22 16:07:05,592 INFO L388 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 25 treesize of output 13 [2021-11-22 16:07:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:07:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:07:07,745 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-22 16:07:07,745 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2021-11-22 16:07:07,753 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-22 16:07:07,753 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-22 16:07:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 16:07:07,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:07:07,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413070391] [2021-11-22 16:07:07,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413070391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:07:07,799 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:07:07,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 12 [2021-11-22 16:07:07,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751619917] [2021-11-22 16:07:07,799 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:07:07,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 16:07:07,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:07:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 16:07:07,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:07:07,801 INFO L87 Difference]: Start difference. First operand 227 states and 259 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:09,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:07:12,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:07:14,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:07:16,870 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:07:18,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:07:20,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:07:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:07:21,095 INFO L93 Difference]: Finished difference Result 302 states and 331 transitions. [2021-11-22 16:07:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:07:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 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 46 [2021-11-22 16:07:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:07:21,098 INFO L225 Difference]: With dead ends: 302 [2021-11-22 16:07:21,098 INFO L226 Difference]: Without dead ends: 302 [2021-11-22 16:07:21,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-11-22 16:07:21,098 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 775 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 34 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:07:21,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 510 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 220 Invalid, 6 Unknown, 0 Unchecked, 12.8s Time] [2021-11-22 16:07:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-22 16:07:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 209. [2021-11-22 16:07:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 203 states have (on average 1.167487684729064) internal successors, (237), 208 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 237 transitions. [2021-11-22 16:07:21,108 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 237 transitions. Word has length 46 [2021-11-22 16:07:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:07:21,108 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 237 transitions. [2021-11-22 16:07:21,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 237 transitions. [2021-11-22 16:07:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-22 16:07:21,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:07:21,110 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-11-22 16:07:21,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-22 16:07:21,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:07:21,324 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:07:21,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:07:21,325 INFO L85 PathProgramCache]: Analyzing trace with hash 822977090, now seen corresponding path program 1 times [2021-11-22 16:07:21,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:07:21,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302268789] [2021-11-22 16:07:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:07:21,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:07:21,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:07:21,327 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:07:21,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-22 16:07:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:07:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-22 16:07:21,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:07:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:07:21,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:07:22,463 INFO L388 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 27 treesize of output 23 [2021-11-22 16:07:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:07:23,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:07:23,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302268789] [2021-11-22 16:07:23,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302268789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:07:23,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:07:23,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-22 16:07:23,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494924679] [2021-11-22 16:07:23,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:07:23,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 16:07:23,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:07:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 16:07:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:07:23,484 INFO L87 Difference]: Start difference. First operand 209 states and 237 transitions. Second operand has 12 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:07:24,352 INFO L93 Difference]: Finished difference Result 276 states and 299 transitions. [2021-11-22 16:07:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:07:24,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-22 16:07:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:07:24,354 INFO L225 Difference]: With dead ends: 276 [2021-11-22 16:07:24,354 INFO L226 Difference]: Without dead ends: 276 [2021-11-22 16:07:24,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-11-22 16:07:24,355 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 413 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:07:24,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 480 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-22 16:07:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-22 16:07:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 195. [2021-11-22 16:07:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.1587301587301588) internal successors, (219), 194 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 219 transitions. [2021-11-22 16:07:24,361 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 219 transitions. Word has length 46 [2021-11-22 16:07:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:07:24,361 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 219 transitions. [2021-11-22 16:07:24,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 219 transitions. [2021-11-22 16:07:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-22 16:07:24,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:07:24,363 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:07:24,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-22 16:07:24,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:07:24,577 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:07:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:07:24,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1144215096, now seen corresponding path program 1 times [2021-11-22 16:07:24,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:07:24,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118446331] [2021-11-22 16:07:24,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:07:24,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:07:24,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:07:24,578 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:07:24,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-22 16:07:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:07:24,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 16:07:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:07:24,961 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:07:24,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-22 16:07:25,518 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-22 16:07:25,519 INFO L388 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 3 case distinctions, treesize of input 38 treesize of output 43 [2021-11-22 16:07:25,532 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:07:25,533 INFO L388 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 37 treesize of output 37 [2021-11-22 16:07:25,755 INFO L388 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 21 treesize of output 20 [2021-11-22 16:07:26,294 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:07:26,294 INFO L388 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 29 treesize of output 29 [2021-11-22 16:07:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:07:26,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:07:27,571 INFO L388 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 16 treesize of output 14 [2021-11-22 16:07:30,013 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-22 16:07:30,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-22 16:07:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:07:31,587 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:07:31,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118446331] [2021-11-22 16:07:31,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118446331] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:07:31,587 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:07:31,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 15 [2021-11-22 16:07:31,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525458440] [2021-11-22 16:07:31,588 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:07:31,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 16:07:31,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:07:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 16:07:31,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=214, Unknown=1, NotChecked=0, Total=272 [2021-11-22 16:07:31,589 INFO L87 Difference]: Start difference. First operand 195 states and 219 transitions. Second operand has 17 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:39,660 WARN L227 SmtUtils]: Spent 6.21s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:07:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:07:41,615 INFO L93 Difference]: Finished difference Result 288 states and 309 transitions. [2021-11-22 16:07:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 16:07:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 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 49 [2021-11-22 16:07:41,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:07:41,618 INFO L225 Difference]: With dead ends: 288 [2021-11-22 16:07:41,618 INFO L226 Difference]: Without dead ends: 288 [2021-11-22 16:07:41,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=200, Invalid=611, Unknown=1, NotChecked=0, Total=812 [2021-11-22 16:07:41,619 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 661 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:07:41,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 740 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 305 Invalid, 0 Unknown, 481 Unchecked, 1.8s Time] [2021-11-22 16:07:41,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-22 16:07:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 195. [2021-11-22 16:07:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.1534391534391535) internal successors, (218), 194 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 218 transitions. [2021-11-22 16:07:41,624 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 218 transitions. Word has length 49 [2021-11-22 16:07:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:07:41,625 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 218 transitions. [2021-11-22 16:07:41,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:41,625 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 218 transitions. [2021-11-22 16:07:41,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-22 16:07:41,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:07:41,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:07:41,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-22 16:07:41,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:07:41,850 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:07:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:07:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash 225472515, now seen corresponding path program 1 times [2021-11-22 16:07:41,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:07:41,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077747492] [2021-11-22 16:07:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:07:41,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:07:41,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:07:41,852 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:07:41,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-22 16:07:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:07:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 16:07:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:07:43,127 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:07:43,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-22 16:07:43,138 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 16:07:43,138 INFO L388 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 28 treesize of output 24 [2021-11-22 16:07:43,750 INFO L388 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 29 treesize of output 21 [2021-11-22 16:07:43,754 INFO L388 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 18 treesize of output 10 [2021-11-22 16:07:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 16:07:43,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:07:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:07:46,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:07:46,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077747492] [2021-11-22 16:07:46,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077747492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:07:46,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:07:46,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-11-22 16:07:46,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577148961] [2021-11-22 16:07:46,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:07:46,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 16:07:46,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:07:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 16:07:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2021-11-22 16:07:46,729 INFO L87 Difference]: Start difference. First operand 195 states and 218 transitions. Second operand has 13 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:07:47,892 INFO L93 Difference]: Finished difference Result 226 states and 250 transitions. [2021-11-22 16:07:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 16:07:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-22 16:07:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:07:47,894 INFO L225 Difference]: With dead ends: 226 [2021-11-22 16:07:47,894 INFO L226 Difference]: Without dead ends: 226 [2021-11-22 16:07:47,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=93, Invalid=286, Unknown=1, NotChecked=0, Total=380 [2021-11-22 16:07:47,895 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 211 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:07:47,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 372 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 156 Invalid, 0 Unknown, 197 Unchecked, 0.6s Time] [2021-11-22 16:07:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-22 16:07:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 200. [2021-11-22 16:07:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.1494845360824741) internal successors, (223), 199 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 223 transitions. [2021-11-22 16:07:47,899 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 223 transitions. Word has length 50 [2021-11-22 16:07:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:07:47,899 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 223 transitions. [2021-11-22 16:07:47,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.666666666666667) internal successors, (92), 12 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 223 transitions. [2021-11-22 16:07:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 16:07:47,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:07:47,900 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:07:47,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-22 16:07:48,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:07:48,113 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:07:48,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:07:48,114 INFO L85 PathProgramCache]: Analyzing trace with hash 80960410, now seen corresponding path program 1 times [2021-11-22 16:07:48,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:07:48,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147153721] [2021-11-22 16:07:48,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:07:48,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:07:48,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:07:48,115 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:07:48,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-22 16:07:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:07:48,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:07:48,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:07:48,442 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:07:48,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-22 16:07:48,978 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-22 16:07:48,978 INFO L388 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 3 case distinctions, treesize of input 36 treesize of output 41 [2021-11-22 16:07:48,993 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:07:48,994 INFO L388 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 35 treesize of output 35 [2021-11-22 16:07:49,221 INFO L388 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 21 treesize of output 20 [2021-11-22 16:07:49,683 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:07:49,686 INFO L388 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 29 treesize of output 29 [2021-11-22 16:07:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:07:50,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:07:51,395 INFO L388 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 16 treesize of output 14 [2021-11-22 16:07:53,949 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-22 16:07:53,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-11-22 16:07:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:07:55,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:07:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147153721] [2021-11-22 16:07:55,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147153721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:07:55,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:07:55,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-11-22 16:07:55,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192330996] [2021-11-22 16:07:55,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:07:55,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 16:07:55,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:07:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 16:07:55,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=273, Unknown=1, NotChecked=0, Total=342 [2021-11-22 16:07:55,710 INFO L87 Difference]: Start difference. First operand 200 states and 223 transitions. Second operand has 19 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:07:58,943 INFO L93 Difference]: Finished difference Result 310 states and 329 transitions. [2021-11-22 16:07:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-22 16:07:58,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 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 51 [2021-11-22 16:07:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:07:58,947 INFO L225 Difference]: With dead ends: 310 [2021-11-22 16:07:58,947 INFO L226 Difference]: Without dead ends: 310 [2021-11-22 16:07:58,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=177, Invalid=524, Unknown=1, NotChecked=0, Total=702 [2021-11-22 16:07:58,948 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 605 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:07:58,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 879 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 394 Invalid, 0 Unknown, 515 Unchecked, 1.7s Time] [2021-11-22 16:07:58,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-22 16:07:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 199. [2021-11-22 16:07:58,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.1443298969072164) internal successors, (222), 198 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2021-11-22 16:07:58,954 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 51 [2021-11-22 16:07:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:07:58,955 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2021-11-22 16:07:58,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.666666666666667) internal successors, (102), 18 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:07:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2021-11-22 16:07:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 16:07:58,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:07:58,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:07:58,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-22 16:07:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:07:59,171 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:07:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:07:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1667821446, now seen corresponding path program 1 times [2021-11-22 16:07:59,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:07:59,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195891663] [2021-11-22 16:07:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:07:59,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:07:59,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:07:59,174 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:07:59,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-22 16:07:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:07:59,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 16:07:59,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:07:59,746 INFO L388 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 22 treesize of output 10 [2021-11-22 16:07:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:07:59,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:00,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 16:08:00,230 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-22 16:08:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:08:01,371 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:08:01,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195891663] [2021-11-22 16:08:01,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195891663] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:08:01,372 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:08:01,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-22 16:08:01,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276609606] [2021-11-22 16:08:01,372 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:08:01,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 16:08:01,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:08:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 16:08:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:08:01,373 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:06,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:08:10,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:08:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:13,105 INFO L93 Difference]: Finished difference Result 249 states and 265 transitions. [2021-11-22 16:08:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 16:08:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-22 16:08:13,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:13,108 INFO L225 Difference]: With dead ends: 249 [2021-11-22 16:08:13,108 INFO L226 Difference]: Without dead ends: 249 [2021-11-22 16:08:13,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-11-22 16:08:13,109 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 671 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 56 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:13,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 669 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 208 Invalid, 2 Unknown, 138 Unchecked, 4.8s Time] [2021-11-22 16:08:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-22 16:08:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 194. [2021-11-22 16:08:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 193 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 214 transitions. [2021-11-22 16:08:13,114 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 214 transitions. Word has length 52 [2021-11-22 16:08:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:13,115 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 214 transitions. [2021-11-22 16:08:13,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 15 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 214 transitions. [2021-11-22 16:08:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-22 16:08:13,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:13,116 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:08:13,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:13,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:08:13,331 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:08:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1785194456, now seen corresponding path program 1 times [2021-11-22 16:08:13,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:08:13,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176672169] [2021-11-22 16:08:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:13,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:08:13,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:08:13,334 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:08:13,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-22 16:08:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:08:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 16:08:13,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:13,732 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-22 16:08:13,732 INFO L388 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 22 treesize of output 29 [2021-11-22 16:08:14,401 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-22 16:08:14,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 64 [2021-11-22 16:08:14,919 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-22 16:08:14,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 86 [2021-11-22 16:08:16,553 INFO L388 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 15 treesize of output 7 [2021-11-22 16:08:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:16,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:35,822 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:08:35,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176672169] [2021-11-22 16:08:35,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176672169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:35,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:35,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-11-22 16:08:35,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778881831] [2021-11-22 16:08:35,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:35,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 16:08:35,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:08:35,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 16:08:35,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=228, Unknown=8, NotChecked=0, Total=306 [2021-11-22 16:08:35,824 INFO L87 Difference]: Start difference. First operand 194 states and 214 transitions. Second operand has 18 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:40,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:40,964 INFO L93 Difference]: Finished difference Result 234 states and 256 transitions. [2021-11-22 16:08:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 16:08:40,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-22 16:08:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:40,966 INFO L225 Difference]: With dead ends: 234 [2021-11-22 16:08:40,966 INFO L226 Difference]: Without dead ends: 234 [2021-11-22 16:08:40,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=143, Invalid=497, Unknown=10, NotChecked=0, Total=650 [2021-11-22 16:08:40,967 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 164 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:40,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 423 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 186 Unchecked, 0.5s Time] [2021-11-22 16:08:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-22 16:08:40,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 193. [2021-11-22 16:08:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 189 states have (on average 1.126984126984127) internal successors, (213), 192 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 213 transitions. [2021-11-22 16:08:40,972 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 213 transitions. Word has length 52 [2021-11-22 16:08:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:40,972 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 213 transitions. [2021-11-22 16:08:40,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 213 transitions. [2021-11-22 16:08:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 16:08:40,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:40,974 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:08:40,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-22 16:08:41,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:08:41,187 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:08:41,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash 493546937, now seen corresponding path program 1 times [2021-11-22 16:08:41,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:08:41,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319645161] [2021-11-22 16:08:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:41,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:08:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:08:41,189 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:08:41,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-22 16:08:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:08:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 16:08:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:41,646 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-22 16:08:41,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-22 16:08:42,334 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-11-22 16:08:42,334 INFO L388 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 3 case distinctions, treesize of input 21 treesize of output 38 [2021-11-22 16:08:42,725 INFO L388 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 29 treesize of output 28 [2021-11-22 16:08:45,841 INFO L388 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 29 treesize of output 21 [2021-11-22 16:08:45,848 INFO L388 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 18 treesize of output 10 [2021-11-22 16:08:46,080 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 16:08:46,081 INFO L388 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 37 treesize of output 37 [2021-11-22 16:08:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:46,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:46,913 INFO L388 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 31 treesize of output 23 [2021-11-22 16:08:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:08:48,251 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:08:48,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319645161] [2021-11-22 16:08:48,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319645161] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:08:48,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:08:48,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-11-22 16:08:48,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542718966] [2021-11-22 16:08:48,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:08:48,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 16:08:48,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:08:48,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 16:08:48,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-11-22 16:08:48,254 INFO L87 Difference]: Start difference. First operand 193 states and 213 transitions. Second operand has 20 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:50,614 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:08:54,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:08:56,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:08:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:08:58,917 INFO L93 Difference]: Finished difference Result 276 states and 293 transitions. [2021-11-22 16:08:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 16:08:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-22 16:08:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:08:58,920 INFO L225 Difference]: With dead ends: 276 [2021-11-22 16:08:58,920 INFO L226 Difference]: Without dead ends: 276 [2021-11-22 16:08:58,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=343, Invalid=1139, Unknown=0, NotChecked=0, Total=1482 [2021-11-22 16:08:58,921 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 624 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 602 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:08:58,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 752 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 479 Invalid, 3 Unknown, 602 Unchecked, 8.1s Time] [2021-11-22 16:08:58,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-22 16:08:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 192. [2021-11-22 16:08:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 189 states have (on average 1.1216931216931216) internal successors, (212), 191 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 212 transitions. [2021-11-22 16:08:58,927 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 212 transitions. Word has length 53 [2021-11-22 16:08:58,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:08:58,927 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 212 transitions. [2021-11-22 16:08:58,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:08:58,928 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 212 transitions. [2021-11-22 16:08:58,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-22 16:08:58,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:08:58,929 INFO L514 BasicCegarLoop]: 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] [2021-11-22 16:08:58,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-22 16:08:59,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:08:59,135 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:08:59,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:08:59,135 INFO L85 PathProgramCache]: Analyzing trace with hash 5070697, now seen corresponding path program 1 times [2021-11-22 16:08:59,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:08:59,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217361970] [2021-11-22 16:08:59,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:08:59,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:08:59,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:08:59,136 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:08:59,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-22 16:08:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:08:59,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 16:08:59,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:08:59,991 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-22 16:08:59,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-11-22 16:09:00,007 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-22 16:09:00,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-11-22 16:09:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:09:00,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:09:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:09:05,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:09:05,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217361970] [2021-11-22 16:09:05,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217361970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:09:05,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:09:05,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-22 16:09:05,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446556890] [2021-11-22 16:09:05,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:09:05,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:09:05,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:09:05,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:09:05,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=62, Unknown=1, NotChecked=0, Total=90 [2021-11-22 16:09:05,644 INFO L87 Difference]: Start difference. First operand 192 states and 212 transitions. Second operand has 10 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:09:07,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:09:07,023 INFO L93 Difference]: Finished difference Result 228 states and 250 transitions. [2021-11-22 16:09:07,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 16:09:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-22 16:09:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:09:07,025 INFO L225 Difference]: With dead ends: 228 [2021-11-22 16:09:07,025 INFO L226 Difference]: Without dead ends: 228 [2021-11-22 16:09:07,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=90, Invalid=181, Unknown=1, NotChecked=0, Total=272 [2021-11-22 16:09:07,026 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 199 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:09:07,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 339 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 69 Invalid, 0 Unknown, 137 Unchecked, 0.6s Time] [2021-11-22 16:09:07,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-22 16:09:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 192. [2021-11-22 16:09:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 189 states have (on average 1.1164021164021165) internal successors, (211), 191 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:09:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 211 transitions. [2021-11-22 16:09:07,029 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 211 transitions. Word has length 54 [2021-11-22 16:09:07,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:09:07,030 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 211 transitions. [2021-11-22 16:09:07,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:09:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 211 transitions. [2021-11-22 16:09:07,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-22 16:09:07,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:09:07,030 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:09:07,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-22 16:09:07,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:09:07,231 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:09:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:09:07,231 INFO L85 PathProgramCache]: Analyzing trace with hash 678872401, now seen corresponding path program 1 times [2021-11-22 16:09:07,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:09:07,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831570444] [2021-11-22 16:09:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:09:07,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:09:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:09:07,233 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:09:07,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-22 16:09:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:09:07,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 16:09:07,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:09:07,750 INFO L388 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 40 treesize of output 28 [2021-11-22 16:09:07,753 INFO L388 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 25 treesize of output 13 [2021-11-22 16:09:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:09:07,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:09:09,187 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-22 16:09:09,187 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2021-11-22 16:09:09,195 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-22 16:09:09,195 INFO L388 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-11-22 16:09:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-22 16:09:09,257 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 16:09:09,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831570444] [2021-11-22 16:09:09,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831570444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 16:09:09,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:09:09,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 12 [2021-11-22 16:09:09,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282233576] [2021-11-22 16:09:09,258 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 16:09:09,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 16:09:09,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 16:09:09,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 16:09:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-22 16:09:09,260 INFO L87 Difference]: Start difference. First operand 192 states and 211 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:09:11,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:09:13,377 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:09:15,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:09:17,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:09:20,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:09:22,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:09:24,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 16:09:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:09:24,509 INFO L93 Difference]: Finished difference Result 308 states and 333 transitions. [2021-11-22 16:09:24,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 16:09:24,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-22 16:09:24,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:09:24,512 INFO L225 Difference]: With dead ends: 308 [2021-11-22 16:09:24,512 INFO L226 Difference]: Without dead ends: 308 [2021-11-22 16:09:24,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:09:24,513 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 757 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 40 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:09:24,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 520 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 211 Invalid, 7 Unknown, 0 Unchecked, 14.7s Time] [2021-11-22 16:09:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-22 16:09:24,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 198. [2021-11-22 16:09:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 195 states have (on average 1.1076923076923078) internal successors, (216), 197 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:09:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 216 transitions. [2021-11-22 16:09:24,521 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 216 transitions. Word has length 55 [2021-11-22 16:09:24,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:09:24,521 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 216 transitions. [2021-11-22 16:09:24,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:09:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 216 transitions. [2021-11-22 16:09:24,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 16:09:24,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:09:24,523 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2021-11-22 16:09:24,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-22 16:09:24,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:09:24,727 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2021-11-22 16:09:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:09:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash 795588564, now seen corresponding path program 1 times [2021-11-22 16:09:24,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 16:09:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572211348] [2021-11-22 16:09:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:09:24,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 16:09:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 16:09:24,729 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 16:09:24,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-22 16:09:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:09:24,899 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 16:09:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 16:09:25,106 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-22 16:09:25,106 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 16:09:25,107 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_LEAK (57 of 58 remaining) [2021-11-22 16:09:25,109 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (56 of 58 remaining) [2021-11-22 16:09:25,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (55 of 58 remaining) [2021-11-22 16:09:25,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (54 of 58 remaining) [2021-11-22 16:09:25,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (53 of 58 remaining) [2021-11-22 16:09:25,110 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (52 of 58 remaining) [2021-11-22 16:09:25,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (51 of 58 remaining) [2021-11-22 16:09:25,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (50 of 58 remaining) [2021-11-22 16:09:25,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (49 of 58 remaining) [2021-11-22 16:09:25,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (48 of 58 remaining) [2021-11-22 16:09:25,111 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (47 of 58 remaining) [2021-11-22 16:09:25,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (46 of 58 remaining) [2021-11-22 16:09:25,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (45 of 58 remaining) [2021-11-22 16:09:25,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (44 of 58 remaining) [2021-11-22 16:09:25,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (43 of 58 remaining) [2021-11-22 16:09:25,112 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (42 of 58 remaining) [2021-11-22 16:09:25,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (41 of 58 remaining) [2021-11-22 16:09:25,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (40 of 58 remaining) [2021-11-22 16:09:25,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (39 of 58 remaining) [2021-11-22 16:09:25,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (38 of 58 remaining) [2021-11-22 16:09:25,113 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION (37 of 58 remaining) [2021-11-22 16:09:25,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION (36 of 58 remaining) [2021-11-22 16:09:25,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_DEREFERENCE (35 of 58 remaining) [2021-11-22 16:09:25,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_DEREFERENCE (34 of 58 remaining) [2021-11-22 16:09:25,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_DEREFERENCE (33 of 58 remaining) [2021-11-22 16:09:25,114 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_DEREFERENCE (32 of 58 remaining) [2021-11-22 16:09:25,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION (31 of 58 remaining) [2021-11-22 16:09:25,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION (30 of 58 remaining) [2021-11-22 16:09:25,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION (29 of 58 remaining) [2021-11-22 16:09:25,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION (28 of 58 remaining) [2021-11-22 16:09:25,115 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (27 of 58 remaining) [2021-11-22 16:09:25,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE (26 of 58 remaining) [2021-11-22 16:09:25,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE (25 of 58 remaining) [2021-11-22 16:09:25,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (24 of 58 remaining) [2021-11-22 16:09:25,116 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (23 of 58 remaining) [2021-11-22 16:09:25,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE (22 of 58 remaining) [2021-11-22 16:09:25,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE (21 of 58 remaining) [2021-11-22 16:09:25,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE (20 of 58 remaining) [2021-11-22 16:09:25,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE (19 of 58 remaining) [2021-11-22 16:09:25,117 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38REQUIRES_VIOLATION (18 of 58 remaining) [2021-11-22 16:09:25,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39REQUIRES_VIOLATION (17 of 58 remaining) [2021-11-22 16:09:25,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 58 remaining) [2021-11-22 16:09:25,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 58 remaining) [2021-11-22 16:09:25,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 58 remaining) [2021-11-22 16:09:25,118 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 58 remaining) [2021-11-22 16:09:25,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44REQUIRES_VIOLATION (12 of 58 remaining) [2021-11-22 16:09:25,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45REQUIRES_VIOLATION (11 of 58 remaining) [2021-11-22 16:09:25,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46REQUIRES_VIOLATION (10 of 58 remaining) [2021-11-22 16:09:25,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47REQUIRES_VIOLATION (9 of 58 remaining) [2021-11-22 16:09:25,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE (8 of 58 remaining) [2021-11-22 16:09:25,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_FREE (7 of 58 remaining) [2021-11-22 16:09:25,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_FREE (6 of 58 remaining) [2021-11-22 16:09:25,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE (5 of 58 remaining) [2021-11-22 16:09:25,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_FREE (4 of 58 remaining) [2021-11-22 16:09:25,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE (3 of 58 remaining) [2021-11-22 16:09:25,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE (2 of 58 remaining) [2021-11-22 16:09:25,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE (1 of 58 remaining) [2021-11-22 16:09:25,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE (0 of 58 remaining) [2021-11-22 16:09:25,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-22 16:09:25,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 16:09:25,347 INFO L732 BasicCegarLoop]: Path program 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:09:25,355 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 16:09:25,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 04:09:25 BoogieIcfgContainer [2021-11-22 16:09:25,437 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 16:09:25,438 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 16:09:25,438 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 16:09:25,438 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 16:09:25,439 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:04:12" (3/4) ... [2021-11-22 16:09:25,442 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-22 16:09:25,442 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 16:09:25,443 INFO L158 Benchmark]: Toolchain (without parser) took 315224.33ms. Allocated memory was 65.0MB in the beginning and 104.9MB in the end (delta: 39.8MB). Free memory was 43.3MB in the beginning and 61.3MB in the end (delta: -18.1MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. [2021-11-22 16:09:25,443 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 65.0MB. Free memory was 46.3MB in the beginning and 46.2MB in the end (delta: 50.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:09:25,444 INFO L158 Benchmark]: CACSL2BoogieTranslator took 672.15ms. Allocated memory is still 65.0MB. Free memory was 43.0MB in the beginning and 37.9MB in the end (delta: 5.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 16:09:25,444 INFO L158 Benchmark]: Boogie Procedure Inliner took 104.00ms. Allocated memory is still 65.0MB. Free memory was 37.7MB in the beginning and 35.1MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-22 16:09:25,444 INFO L158 Benchmark]: Boogie Preprocessor took 86.30ms. Allocated memory is still 65.0MB. Free memory was 35.1MB in the beginning and 32.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 16:09:25,444 INFO L158 Benchmark]: RCFGBuilder took 977.58ms. Allocated memory is still 65.0MB. Free memory was 32.8MB in the beginning and 27.4MB in the end (delta: 5.4MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. [2021-11-22 16:09:25,445 INFO L158 Benchmark]: TraceAbstraction took 313359.48ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 65.2MB in the beginning and 62.4MB in the end (delta: 2.9MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. [2021-11-22 16:09:25,445 INFO L158 Benchmark]: Witness Printer took 5.12ms. Allocated memory is still 104.9MB. Free memory was 62.4MB in the beginning and 61.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 16:09:25,446 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 65.0MB. Free memory was 46.3MB in the beginning and 46.2MB in the end (delta: 50.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 672.15ms. Allocated memory is still 65.0MB. Free memory was 43.0MB in the beginning and 37.9MB in the end (delta: 5.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 104.00ms. Allocated memory is still 65.0MB. Free memory was 37.7MB in the beginning and 35.1MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 86.30ms. Allocated memory is still 65.0MB. Free memory was 35.1MB in the beginning and 32.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 977.58ms. Allocated memory is still 65.0MB. Free memory was 32.8MB in the beginning and 27.4MB in the end (delta: 5.4MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. * TraceAbstraction took 313359.48ms. Allocated memory was 86.0MB in the beginning and 104.9MB in the end (delta: 18.9MB). Free memory was 65.2MB in the beginning and 62.4MB in the end (delta: 2.9MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. * Witness Printer took 5.12ms. Allocated memory is still 104.9MB. Free memory was 62.4MB in the beginning and 61.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L722] CALL parse_input("c1") [L692] int i = 0; VAL [commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") [L723] CALL parse_input("c1") [L692] int i = 0; VAL [commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L723] RET parse_input("c1") [L724] CALL parse_input("c2") [L692] int i = 0; VAL [commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [commands={6:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [commands={6:0}, commands[i].name={2:0}, global={7:0}, i=1, input={5:0}, input={5:0}, state=1] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L692] COND FALSE !(i < 2) VAL [commands={6:0}, global={7:0}, i=2, input={5:0}, input={5:0}, state=1] [L724] RET parse_input("c2") [L725] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 153 locations, 58 error locations. Started 1 CEGAR loops. OverallTime: 313.2s, OverallIterations: 44, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 164.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 25 mSolverCounterUnknown, 17189 SdHoareTripleChecker+Valid, 80.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17189 mSDsluCounter, 20950 SdHoareTripleChecker+Invalid, 76.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 4851 IncrementalHoareTripleChecker+Unchecked, 16176 mSDsCounter, 1167 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8896 IncrementalHoareTripleChecker+Invalid, 14939 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1167 mSolverCounterUnsat, 4774 mSDtfsCounter, 8896 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2886 GetRequests, 2279 SyntacticMatches, 52 SemanticMatches, 555 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 161.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=364occurred in iteration=8, InterpolantAutomatonStates: 472, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 43 MinimizatonAttempts, 3850 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 133.9s InterpolantComputationTime, 1412 NumberOfCodeBlocks, 1412 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 2624 ConstructedInterpolants, 649 QuantifiedInterpolants, 48001 SizeOfPredicates, 179 NumberOfNonLiveVariables, 5381 ConjunctsInSsa, 348 ConjunctsInUnsatCore, 86 InterpolantComputations, 58 PerfectInterpolantSequences, 91/248 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-22 16:09:25,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea90b2e-e3da-4f65-a4a3-90f7c1c4f26d/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample