./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8 --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 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:07:40,480 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:07:40,483 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:07:40,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:07:40,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:07:40,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:07:40,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:07:40,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:07:40,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:07:40,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:07:40,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:07:40,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:07:40,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:07:40,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:07:40,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:07:40,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:07:40,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:07:40,561 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:07:40,563 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:07:40,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:07:40,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:07:40,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:07:40,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:07:40,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:07:40,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:07:40,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:07:40,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:07:40,591 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:07:40,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:07:40,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:07:40,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:07:40,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:07:40,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:07:40,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:07:40,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:07:40,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:07:40,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:07:40,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:07:40,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:07:40,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:07:40,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:07:40,607 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:07:40,653 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:07:40,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:07:40,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:07:40,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:07:40,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:07:40,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:07:40,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:07:40,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:07:40,657 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:07:40,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:07:40,659 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:07:40,659 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:07:40,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:07:40,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:07:40,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:07:40,660 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:07:40,660 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:07:40,660 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:07:40,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:07:40,661 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:07:40,661 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:07:40,661 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:07:40,662 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:07:40,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:07:40,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:07:40,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:07:40,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:07:40,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:07:40,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:07:40,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:07:40,665 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_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a [2022-11-16 12:07:41,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:07:41,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:07:41,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:07:41,081 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:07:41,082 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:07:41,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2022-11-16 12:07:41,166 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/data/3dafa9792/e08be6994333406eb7e039b600591750/FLAG79d8f9304 [2022-11-16 12:07:41,848 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:07:41,849 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2022-11-16 12:07:41,864 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/data/3dafa9792/e08be6994333406eb7e039b600591750/FLAG79d8f9304 [2022-11-16 12:07:42,104 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/data/3dafa9792/e08be6994333406eb7e039b600591750 [2022-11-16 12:07:42,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:07:42,118 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:07:42,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:07:42,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:07:42,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:07:42,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da92b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42, skipping insertion in model container [2022-11-16 12:07:42,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:07:42,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:07:42,662 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2022-11-16 12:07:42,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:07:42,675 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:07:42,721 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2022-11-16 12:07:42,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:07:42,758 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:07:42,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42 WrapperNode [2022-11-16 12:07:42,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:07:42,759 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:07:42,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:07:42,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:07:42,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,793 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,839 INFO L138 Inliner]: procedures = 126, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 133 [2022-11-16 12:07:42,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:07:42,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:07:42,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:07:42,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:07:42,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,921 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:07:42,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:07:42,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:07:42,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:07:42,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (1/1) ... [2022-11-16 12:07:42,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:07:42,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:42,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:07:43,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:07:43,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:07:43,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:07:43,058 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-16 12:07:43,058 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-16 12:07:43,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:07:43,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:07:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 12:07:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 12:07:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:07:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:07:43,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:07:43,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:07:43,243 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:07:43,246 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:07:43,703 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:07:43,712 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:07:43,712 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 12:07:43,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:07:43 BoogieIcfgContainer [2022-11-16 12:07:43,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:07:43,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:07:43,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:07:43,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:07:43,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:07:42" (1/3) ... [2022-11-16 12:07:43,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6942fa8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:07:43, skipping insertion in model container [2022-11-16 12:07:43,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:42" (2/3) ... [2022-11-16 12:07:43,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6942fa8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:07:43, skipping insertion in model container [2022-11-16 12:07:43,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:07:43" (3/3) ... [2022-11-16 12:07:43,728 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_update_all_reverse.i [2022-11-16 12:07:43,752 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:07:43,753 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-16 12:07:43,807 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:07:43,816 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ad34f64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:07:43,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2022-11-16 12:07:43,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 79 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:07:43,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:43,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:07:43,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:43,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:43,840 INFO L85 PathProgramCache]: Analyzing trace with hash 894505749, now seen corresponding path program 1 times [2022-11-16 12:07:43,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:43,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331448652] [2022-11-16 12:07:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:43,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:44,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:44,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331448652] [2022-11-16 12:07:44,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331448652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:44,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:44,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:07:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022158759] [2022-11-16 12:07:44,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:44,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:07:44,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:44,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:07:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:07:44,188 INFO L87 Difference]: Start difference. First operand has 83 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 79 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:44,359 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-11-16 12:07:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:07:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:07:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:44,370 INFO L225 Difference]: With dead ends: 81 [2022-11-16 12:07:44,370 INFO L226 Difference]: Without dead ends: 78 [2022-11-16 12:07:44,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:07:44,376 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:44,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:07:44,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-16 12:07:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-16 12:07:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.653061224489796) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2022-11-16 12:07:44,449 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 6 [2022-11-16 12:07:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:44,450 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2022-11-16 12:07:44,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2022-11-16 12:07:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:07:44,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:44,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:07:44,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:07:44,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 894505750, now seen corresponding path program 1 times [2022-11-16 12:07:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:44,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289400890] [2022-11-16 12:07:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:44,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:44,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289400890] [2022-11-16 12:07:44,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289400890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:44,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:44,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:07:44,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740151918] [2022-11-16 12:07:44,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:44,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:07:44,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:44,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:07:44,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:07:44,599 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:44,700 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-11-16 12:07:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:07:44,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:07:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:44,702 INFO L225 Difference]: With dead ends: 76 [2022-11-16 12:07:44,702 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 12:07:44,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:07:44,704 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 4 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:44,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 137 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:07:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 12:07:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-16 12:07:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:44,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-11-16 12:07:44,715 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 6 [2022-11-16 12:07:44,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:44,715 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-11-16 12:07:44,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:44,716 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-11-16 12:07:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:07:44,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:44,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:44,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:07:44,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash -835957545, now seen corresponding path program 1 times [2022-11-16 12:07:44,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:44,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126393612] [2022-11-16 12:07:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:44,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:44,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:44,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126393612] [2022-11-16 12:07:44,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126393612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:44,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:44,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:07:44,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802477053] [2022-11-16 12:07:44,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:44,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:07:44,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:44,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:07:44,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:07:44,932 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:07:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:45,037 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-11-16 12:07:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:07:45,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-16 12:07:45,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:45,040 INFO L225 Difference]: With dead ends: 83 [2022-11-16 12:07:45,040 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 12:07:45,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:07:45,042 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 5 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:45,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 203 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:07:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 12:07:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2022-11-16 12:07:45,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.6) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2022-11-16 12:07:45,055 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 13 [2022-11-16 12:07:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:45,060 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2022-11-16 12:07:45,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:07:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2022-11-16 12:07:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:07:45,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:45,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:45,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:07:45,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash -125034980, now seen corresponding path program 1 times [2022-11-16 12:07:45,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:45,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674938590] [2022-11-16 12:07:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:45,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:45,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:45,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:07:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:45,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674938590] [2022-11-16 12:07:45,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674938590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:45,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:45,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:07:45,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918788352] [2022-11-16 12:07:45,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:45,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:45,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:45,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:45,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:07:45,533 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:45,809 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2022-11-16 12:07:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:07:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-16 12:07:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:45,828 INFO L225 Difference]: With dead ends: 97 [2022-11-16 12:07:45,828 INFO L226 Difference]: Without dead ends: 97 [2022-11-16 12:07:45,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:45,830 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 69 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:45,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 268 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:07:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-16 12:07:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2022-11-16 12:07:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.58) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-11-16 12:07:45,853 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 22 [2022-11-16 12:07:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:45,854 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-11-16 12:07:45,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-11-16 12:07:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 12:07:45,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:45,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:45,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:07:45,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:45,857 INFO L85 PathProgramCache]: Analyzing trace with hash -125034979, now seen corresponding path program 1 times [2022-11-16 12:07:45,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:45,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754797304] [2022-11-16 12:07:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:45,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:46,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:46,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754797304] [2022-11-16 12:07:46,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754797304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:46,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:46,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:07:46,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541401066] [2022-11-16 12:07:46,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:46,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:07:46,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:07:46,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:07:46,289 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:46,532 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-11-16 12:07:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:07:46,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-16 12:07:46,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:46,541 INFO L225 Difference]: With dead ends: 76 [2022-11-16 12:07:46,541 INFO L226 Difference]: Without dead ends: 76 [2022-11-16 12:07:46,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:07:46,550 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 69 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:46,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 277 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:07:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-16 12:07:46,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-16 12:07:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.56) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2022-11-16 12:07:46,563 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 22 [2022-11-16 12:07:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:46,563 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2022-11-16 12:07:46,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2022-11-16 12:07:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 12:07:46,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:46,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:46,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:07:46,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:46,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1180454715, now seen corresponding path program 1 times [2022-11-16 12:07:46,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:46,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115187095] [2022-11-16 12:07:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:46,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:46,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:07:47,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:47,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115187095] [2022-11-16 12:07:47,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115187095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:47,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237599213] [2022-11-16 12:07:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:47,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:47,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:47,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:47,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:07:47,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:47,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:07:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:47,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:07:47,410 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_242 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_242))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-16 12:07:47,565 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:07:47,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:07:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-16 12:07:47,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:47,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237599213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:47,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:47,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-11-16 12:07:47,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152524199] [2022-11-16 12:07:47,726 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:47,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:07:47,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:07:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2022-11-16 12:07:47,732 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:07:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:48,022 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-11-16 12:07:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:07:48,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-16 12:07:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:48,025 INFO L225 Difference]: With dead ends: 94 [2022-11-16 12:07:48,025 INFO L226 Difference]: Without dead ends: 94 [2022-11-16 12:07:48,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-11-16 12:07:48,029 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 67 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:48,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 308 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 186 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-11-16 12:07:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-16 12:07:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2022-11-16 12:07:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.54) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-11-16 12:07:48,037 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 25 [2022-11-16 12:07:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:48,037 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-11-16 12:07:48,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:07:48,038 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-11-16 12:07:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 12:07:48,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:48,045 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:48,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:48,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:48,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1180454714, now seen corresponding path program 1 times [2022-11-16 12:07:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:48,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077090044] [2022-11-16 12:07:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:48,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:48,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:48,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:48,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077090044] [2022-11-16 12:07:48,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077090044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809271981] [2022-11-16 12:07:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:48,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:48,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:48,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:48,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:07:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:48,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:07:48,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:49,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:07:49,269 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_343 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_343) |c_#length|)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-16 12:07:49,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:07:49,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:07:49,351 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:07:49,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:07:49,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-11-16 12:07:49,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:49,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809271981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:49,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:49,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2022-11-16 12:07:49,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853366898] [2022-11-16 12:07:49,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:07:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:49,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:07:49,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=358, Unknown=1, NotChecked=38, Total=462 [2022-11-16 12:07:49,615 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:07:50,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:50,072 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-11-16 12:07:50,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:07:50,073 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-11-16 12:07:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:50,074 INFO L225 Difference]: With dead ends: 94 [2022-11-16 12:07:50,074 INFO L226 Difference]: Without dead ends: 94 [2022-11-16 12:07:50,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=423, Unknown=1, NotChecked=42, Total=552 [2022-11-16 12:07:50,075 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 180 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:50,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 408 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 324 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-11-16 12:07:50,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-16 12:07:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2022-11-16 12:07:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.52) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-11-16 12:07:50,082 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 25 [2022-11-16 12:07:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:50,083 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-11-16 12:07:50,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 16 states have internal predecessors, (40), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:07:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-11-16 12:07:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 12:07:50,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:50,091 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:50,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:50,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:50,291 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:50,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2031866825, now seen corresponding path program 1 times [2022-11-16 12:07:50,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:50,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832828264] [2022-11-16 12:07:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:50,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:50,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:07:50,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:50,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832828264] [2022-11-16 12:07:50,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832828264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:50,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:50,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:07:50,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102259246] [2022-11-16 12:07:50,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:50,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:07:50,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:07:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:07:50,593 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:51,040 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-11-16 12:07:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:07:51,041 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-16 12:07:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:51,043 INFO L225 Difference]: With dead ends: 142 [2022-11-16 12:07:51,043 INFO L226 Difference]: Without dead ends: 142 [2022-11-16 12:07:51,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:07:51,044 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 312 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:51,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 479 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:07:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-16 12:07:51,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 76. [2022-11-16 12:07:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 72 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2022-11-16 12:07:51,068 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 30 [2022-11-16 12:07:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:51,069 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2022-11-16 12:07:51,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:51,070 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2022-11-16 12:07:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 12:07:51,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:51,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:51,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:07:51,072 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:51,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2031866826, now seen corresponding path program 1 times [2022-11-16 12:07:51,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:51,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237117352] [2022-11-16 12:07:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:51,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:51,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:07:51,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237117352] [2022-11-16 12:07:51,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237117352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007184429] [2022-11-16 12:07:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:51,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:51,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:51,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:51,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:07:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:51,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:07:51,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:07:51,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:07:51,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007184429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:51,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:07:51,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-11-16 12:07:51,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124463687] [2022-11-16 12:07:51,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:51,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:07:51,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:51,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:07:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:07:51,514 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:51,576 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2022-11-16 12:07:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:07:51,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-16 12:07:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:51,578 INFO L225 Difference]: With dead ends: 104 [2022-11-16 12:07:51,578 INFO L226 Difference]: Without dead ends: 104 [2022-11-16 12:07:51,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:07:51,579 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 122 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:51,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 216 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:07:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-16 12:07:51,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2022-11-16 12:07:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.5178571428571428) internal successors, (85), 75 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2022-11-16 12:07:51,586 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 30 [2022-11-16 12:07:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:51,586 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2022-11-16 12:07:51,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2022-11-16 12:07:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 12:07:51,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:51,588 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:51,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:07:51,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:07:51,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2031866881, now seen corresponding path program 1 times [2022-11-16 12:07:51,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:51,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369011709] [2022-11-16 12:07:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:51,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:52,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:52,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369011709] [2022-11-16 12:07:52,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369011709] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:52,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:52,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:07:52,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417698753] [2022-11-16 12:07:52,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:52,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:07:52,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:52,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:07:52,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:07:52,242 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:52,692 INFO L93 Difference]: Finished difference Result 127 states and 140 transitions. [2022-11-16 12:07:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:07:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-11-16 12:07:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:52,694 INFO L225 Difference]: With dead ends: 127 [2022-11-16 12:07:52,694 INFO L226 Difference]: Without dead ends: 127 [2022-11-16 12:07:52,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:07:52,696 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 307 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:52,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 500 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:07:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-16 12:07:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2022-11-16 12:07:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.4821428571428572) internal successors, (83), 75 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2022-11-16 12:07:52,701 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 30 [2022-11-16 12:07:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:52,702 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2022-11-16 12:07:52,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:07:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2022-11-16 12:07:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 12:07:52,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:52,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:52,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:07:52,705 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:52,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1922829059, now seen corresponding path program 1 times [2022-11-16 12:07:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:52,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271411323] [2022-11-16 12:07:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:52,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:53,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:53,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:53,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:53,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271411323] [2022-11-16 12:07:53,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271411323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:53,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464087882] [2022-11-16 12:07:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:53,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:53,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:53,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:53,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:07:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:53,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 12:07:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:53,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:07:53,669 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:07:53,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:07:53,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:07:53,767 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:07:53,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 12:07:53,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 12:07:53,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:53,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:53,997 INFO L321 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-11-16 12:07:53,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 12:07:54,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464087882] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:54,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:07:54,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 23 [2022-11-16 12:07:54,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653695348] [2022-11-16 12:07:54,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:54,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 12:07:54,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 12:07:54,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:07:54,155 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:55,261 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2022-11-16 12:07:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:07:55,262 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-11-16 12:07:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:55,265 INFO L225 Difference]: With dead ends: 125 [2022-11-16 12:07:55,266 INFO L226 Difference]: Without dead ends: 125 [2022-11-16 12:07:55,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 12:07:55,269 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 173 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:55,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 896 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:07:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-16 12:07:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 94. [2022-11-16 12:07:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.4428571428571428) internal successors, (101), 89 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:07:55,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2022-11-16 12:07:55,287 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 33 [2022-11-16 12:07:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:55,288 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2022-11-16 12:07:55,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:07:55,288 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2022-11-16 12:07:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 12:07:55,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:55,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:55,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:55,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:55,499 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:07:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:55,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1922829058, now seen corresponding path program 1 times [2022-11-16 12:07:55,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:55,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421905485] [2022-11-16 12:07:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:55,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:07:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:07:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:56,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:56,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421905485] [2022-11-16 12:07:56,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421905485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:56,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265983797] [2022-11-16 12:07:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:56,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:56,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:56,748 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:56,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:07:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 12:07:56,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:56,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:07:57,413 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:07:57,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:07:57,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2022-11-16 12:07:57,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:07:57,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:07:57,721 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:07:57,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-11-16 12:07:57,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-11-16 12:07:58,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-16 12:07:58,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-16 12:07:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:58,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:58,601 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_818 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_818) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 4))) (forall ((v_ArrVal_818 (Array Int Int)) (v_ArrVal_817 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_818) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_817) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))) is different from false [2022-11-16 12:07:58,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:58,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-16 12:07:58,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:58,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-16 12:07:58,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2022-11-16 12:07:58,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2022-11-16 12:07:58,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-11-16 12:07:58,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-11-16 12:07:58,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:58,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-16 12:07:58,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:07:58,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-16 12:08:03,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265983797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:03,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:03,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-11-16 12:08:03,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47430891] [2022-11-16 12:08:03,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:03,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:08:03,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:03,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:08:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2015, Unknown=18, NotChecked=90, Total=2256 [2022-11-16 12:08:03,266 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 31 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:08:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:05,358 INFO L93 Difference]: Finished difference Result 150 states and 167 transitions. [2022-11-16 12:08:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 12:08:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 31 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-11-16 12:08:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:05,360 INFO L225 Difference]: With dead ends: 150 [2022-11-16 12:08:05,360 INFO L226 Difference]: Without dead ends: 150 [2022-11-16 12:08:05,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=272, Invalid=2794, Unknown=18, NotChecked=108, Total=3192 [2022-11-16 12:08:05,362 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 191 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:05,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1478 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 12:08:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-16 12:08:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2022-11-16 12:08:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 86 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:08:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-11-16 12:08:05,376 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 33 [2022-11-16 12:08:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:05,377 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-11-16 12:08:05,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 31 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:08:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-11-16 12:08:05,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 12:08:05,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:05,382 INFO L195 NwaCegarLoop]: 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] [2022-11-16 12:08:05,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:05,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 12:08:05,584 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:05,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:05,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1020012727, now seen corresponding path program 2 times [2022-11-16 12:08:05,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:05,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698732519] [2022-11-16 12:08:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:05,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:05,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:05,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:08:05,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:05,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698732519] [2022-11-16 12:08:05,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698732519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:05,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173498281] [2022-11-16 12:08:05,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:08:05,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:05,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:05,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:05,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:08:06,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:08:06,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:06,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:08:06,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:08:06,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:08:06,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173498281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:06,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:06,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 8 [2022-11-16 12:08:06,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429665803] [2022-11-16 12:08:06,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:06,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:08:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:08:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:08:06,126 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:06,177 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-11-16 12:08:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:08:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-11-16 12:08:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:06,181 INFO L225 Difference]: With dead ends: 89 [2022-11-16 12:08:06,182 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 12:08:06,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:08:06,186 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 217 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:06,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 115 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:08:06,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 12:08:06,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-16 12:08:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 67 states have (on average 1.373134328358209) internal successors, (92), 84 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:08:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2022-11-16 12:08:06,191 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 36 [2022-11-16 12:08:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:06,191 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2022-11-16 12:08:06,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2022-11-16 12:08:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 12:08:06,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:06,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:06,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:06,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:08:06,403 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:06,403 INFO L85 PathProgramCache]: Analyzing trace with hash 999795886, now seen corresponding path program 1 times [2022-11-16 12:08:06,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:06,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365465737] [2022-11-16 12:08:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:06,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:06,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:06,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:08:06,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:06,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365465737] [2022-11-16 12:08:06,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365465737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:06,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:08:06,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:08:06,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595876315] [2022-11-16 12:08:06,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:06,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:08:06,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:06,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:08:06,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:08:06,672 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:07,010 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2022-11-16 12:08:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:08:07,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-11-16 12:08:07,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:07,012 INFO L225 Difference]: With dead ends: 114 [2022-11-16 12:08:07,013 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 12:08:07,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:08:07,014 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 280 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:07,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 314 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:08:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 12:08:07,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 92. [2022-11-16 12:08:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 70 states have (on average 1.4) internal successors, (98), 87 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:08:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2022-11-16 12:08:07,019 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 40 [2022-11-16 12:08:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:07,020 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2022-11-16 12:08:07,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2022-11-16 12:08:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 12:08:07,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:07,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:07,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:08:07,022 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash 999795887, now seen corresponding path program 1 times [2022-11-16 12:08:07,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:07,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977911105] [2022-11-16 12:08:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:07,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:07,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:07,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:08:07,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:07,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977911105] [2022-11-16 12:08:07,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977911105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:07,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715863702] [2022-11-16 12:08:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:07,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:07,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:07,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:07,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:08:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:07,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:08:07,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:08:07,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:08:07,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715863702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:07,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:07,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 7 [2022-11-16 12:08:07,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848426449] [2022-11-16 12:08:07,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:07,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:08:07,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:08:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:08:07,605 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:08:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:07,734 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2022-11-16 12:08:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:08:07,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-11-16 12:08:07,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:07,735 INFO L225 Difference]: With dead ends: 120 [2022-11-16 12:08:07,735 INFO L226 Difference]: Without dead ends: 120 [2022-11-16 12:08:07,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:08:07,736 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 131 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:07,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 294 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:08:07,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-16 12:08:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2022-11-16 12:08:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 90 states have (on average 1.4333333333333333) internal successors, (129), 107 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:08:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2022-11-16 12:08:07,742 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 40 [2022-11-16 12:08:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:07,742 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2022-11-16 12:08:07,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:08:07,743 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2022-11-16 12:08:07,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 12:08:07,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:07,744 INFO L195 NwaCegarLoop]: 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] [2022-11-16 12:08:07,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:07,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:07,945 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash 968760597, now seen corresponding path program 1 times [2022-11-16 12:08:07,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:07,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421345977] [2022-11-16 12:08:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:07,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:08,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:08,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:08:08,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421345977] [2022-11-16 12:08:08,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421345977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:08,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299370602] [2022-11-16 12:08:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:08,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:08,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:08,259 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:08,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:08:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:08:08,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:08:08,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:08:08,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299370602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:08,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:08,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-11-16 12:08:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308117673] [2022-11-16 12:08:08,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:08:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:08:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:08:08,636 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:08:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:08,783 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2022-11-16 12:08:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:08:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-11-16 12:08:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:08,785 INFO L225 Difference]: With dead ends: 114 [2022-11-16 12:08:08,785 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 12:08:08,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:08:08,785 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 173 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:08,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 290 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:08:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 12:08:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2022-11-16 12:08:08,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.4186046511627908) internal successors, (122), 103 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:08:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2022-11-16 12:08:08,790 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 41 [2022-11-16 12:08:08,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:08,790 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2022-11-16 12:08:08,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:08:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2022-11-16 12:08:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:08:08,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:08,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:08,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:08,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:08,993 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash -192932373, now seen corresponding path program 3 times [2022-11-16 12:08:08,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:08,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488729572] [2022-11-16 12:08:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:08,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:09,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:09,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:09,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:08:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:08:09,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:09,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488729572] [2022-11-16 12:08:09,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488729572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:09,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66581287] [2022-11-16 12:08:09,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:08:09,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:09,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:09,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:09,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:08:09,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:08:09,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:09,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:08:09,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:08:09,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:08:09,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66581287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:09,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:09,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-16 12:08:09,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599905884] [2022-11-16 12:08:09,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:09,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:08:09,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:08:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:08:09,484 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:08:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:09,498 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-11-16 12:08:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:08:09,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-11-16 12:08:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:09,500 INFO L225 Difference]: With dead ends: 92 [2022-11-16 12:08:09,500 INFO L226 Difference]: Without dead ends: 92 [2022-11-16 12:08:09,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:08:09,501 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 58 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:09,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 93 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:08:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-16 12:08:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-16 12:08:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 88 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:08:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2022-11-16 12:08:09,506 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 45 [2022-11-16 12:08:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:09,506 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2022-11-16 12:08:09,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:08:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2022-11-16 12:08:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 12:08:09,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:09,509 INFO L195 NwaCegarLoop]: 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] [2022-11-16 12:08:09,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:09,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:08:09,732 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 884092027, now seen corresponding path program 2 times [2022-11-16 12:08:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:09,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796268582] [2022-11-16 12:08:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:09,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:10,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:10,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:08:10,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:10,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796268582] [2022-11-16 12:08:10,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796268582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:10,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:08:10,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:08:10,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133422031] [2022-11-16 12:08:10,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:10,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:08:10,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:08:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:08:10,234 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:10,567 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2022-11-16 12:08:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:08:10,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-11-16 12:08:10,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:10,569 INFO L225 Difference]: With dead ends: 132 [2022-11-16 12:08:10,569 INFO L226 Difference]: Without dead ends: 132 [2022-11-16 12:08:10,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:08:10,570 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 409 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:10,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 294 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:08:10,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-16 12:08:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2022-11-16 12:08:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.3835616438356164) internal successors, (101), 88 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:08:10,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2022-11-16 12:08:10,574 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 45 [2022-11-16 12:08:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:10,575 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2022-11-16 12:08:10,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2022-11-16 12:08:10,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:08:10,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:10,576 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:10,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:08:10,576 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1246140989, now seen corresponding path program 1 times [2022-11-16 12:08:10,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:10,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37970187] [2022-11-16 12:08:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:10,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:10,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:10,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:08:10,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:10,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37970187] [2022-11-16 12:08:10,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37970187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:10,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011092029] [2022-11-16 12:08:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:10,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:10,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:10,797 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:10,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:08:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:11,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:08:11,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:08:11,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:08:11,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011092029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:11,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:11,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 8 [2022-11-16 12:08:11,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017340765] [2022-11-16 12:08:11,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:11,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:08:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:08:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:08:11,114 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:11,183 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-11-16 12:08:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:08:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-11-16 12:08:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:11,185 INFO L225 Difference]: With dead ends: 88 [2022-11-16 12:08:11,185 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 12:08:11,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:08:11,186 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 129 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:11,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:08:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 12:08:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-16 12:08:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.3098591549295775) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:08:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-11-16 12:08:11,191 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 48 [2022-11-16 12:08:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:11,191 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-11-16 12:08:11,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-11-16 12:08:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:08:11,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:11,192 INFO L195 NwaCegarLoop]: 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] [2022-11-16 12:08:11,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:11,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:11,399 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1246140934, now seen corresponding path program 1 times [2022-11-16 12:08:11,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:11,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306060643] [2022-11-16 12:08:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:11,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:12,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:12,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:08:12,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:12,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306060643] [2022-11-16 12:08:12,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306060643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:12,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518436175] [2022-11-16 12:08:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:12,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:12,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:12,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:12,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:08:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:13,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-16 12:08:13,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:13,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:08:13,172 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:08:13,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:08:13,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:08:13,355 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:08:13,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 12:08:13,737 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:08:13,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 12:08:13,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:13,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-16 12:08:13,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 12:08:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:08:13,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:16,166 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1754 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base| v_ArrVal_1754) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2022-11-16 12:08:16,175 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1754 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|) v_ArrVal_1754) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2022-11-16 12:08:16,189 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1754 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_1754) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) 1)) is different from false [2022-11-16 12:08:16,448 INFO L321 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-16 12:08:16,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 12:08:16,584 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1754 (Array Int Int)) (v_ArrVal_1753 (Array Int Int))) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1753))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) v_ArrVal_1754)) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) is different from false [2022-11-16 12:08:16,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:16,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 29 [2022-11-16 12:08:16,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 200 [2022-11-16 12:08:16,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 180 [2022-11-16 12:08:16,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 172 [2022-11-16 12:08:16,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518436175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:16,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:16,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 39 [2022-11-16 12:08:16,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064334607] [2022-11-16 12:08:16,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:16,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 12:08:16,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 12:08:16,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1874, Unknown=65, NotChecked=364, Total=2450 [2022-11-16 12:08:16,820 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:08:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:18,549 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2022-11-16 12:08:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:08:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2022-11-16 12:08:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:18,551 INFO L225 Difference]: With dead ends: 145 [2022-11-16 12:08:18,551 INFO L226 Difference]: Without dead ends: 145 [2022-11-16 12:08:18,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=387, Invalid=3345, Unknown=66, NotChecked=492, Total=4290 [2022-11-16 12:08:18,553 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 529 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:18,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 962 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:08:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-16 12:08:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 87. [2022-11-16 12:08:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 83 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:08:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2022-11-16 12:08:18,559 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 48 [2022-11-16 12:08:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:18,559 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2022-11-16 12:08:18,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 35 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:08:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2022-11-16 12:08:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 12:08:18,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:18,561 INFO L195 NwaCegarLoop]: 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] [2022-11-16 12:08:18,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:18,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:18,762 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1246140935, now seen corresponding path program 1 times [2022-11-16 12:08:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:18,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891210212] [2022-11-16 12:08:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:18,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:20,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:08:20,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:20,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891210212] [2022-11-16 12:08:20,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891210212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:20,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801811029] [2022-11-16 12:08:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:20,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:20,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:20,952 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:20,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:08:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:21,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-16 12:08:21,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:21,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:08:21,850 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:08:21,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:08:21,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:08:22,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:08:22,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:08:22,218 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:08:22,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-11-16 12:08:22,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-11-16 12:08:22,773 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:08:22,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-11-16 12:08:22,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-11-16 12:08:22,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:22,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 32 [2022-11-16 12:08:22,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:22,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2022-11-16 12:08:23,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-16 12:08:23,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-16 12:08:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:08:23,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:24,295 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1898 (Array Int Int)) (v_ArrVal_1897 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base| v_ArrVal_1897) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base| v_ArrVal_1898) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_1897 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base| v_ArrVal_1897) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4)))) is different from false [2022-11-16 12:08:24,308 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((v_ArrVal_1897 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1897) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4))) (forall ((v_ArrVal_1898 (Array Int Int)) (v_ArrVal_1897 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1897) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1898) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) is different from false [2022-11-16 12:08:24,329 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((v_ArrVal_1897 (Array Int Int))) (<= 0 (+ 4 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1897) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (forall ((v_ArrVal_1898 (Array Int Int)) (v_ArrVal_1897 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1897) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1898) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) is different from false [2022-11-16 12:08:24,345 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_#res#1.base|) |c_ULTIMATE.start_sll_circular_create_#res#1.offset|))) (and (forall ((v_ArrVal_1898 (Array Int Int)) (v_ArrVal_1897 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1897) |c_ULTIMATE.start_sll_circular_create_#res#1.base|) |c_ULTIMATE.start_sll_circular_create_#res#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1898) |c_ULTIMATE.start_sll_circular_create_#res#1.base|) |c_ULTIMATE.start_sll_circular_create_#res#1.offset|)))) (forall ((v_ArrVal_1897 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1897) |c_ULTIMATE.start_sll_circular_create_#res#1.base|) |c_ULTIMATE.start_sll_circular_create_#res#1.offset|) 4))))) is different from false [2022-11-16 12:08:24,358 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_1897 (Array Int Int))) (<= 0 (+ 4 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1897) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) (forall ((v_ArrVal_1898 (Array Int Int)) (v_ArrVal_1897 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1897) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1898) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) is different from false [2022-11-16 12:08:24,375 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1898 (Array Int Int)) (v_ArrVal_1897 (Array Int Int)) (v_ArrVal_1896 (Array Int Int)) (v_ArrVal_1895 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1895))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1896) .cse0 v_ArrVal_1897) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 8) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_1898) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) (forall ((v_ArrVal_1897 (Array Int Int)) (v_ArrVal_1896 (Array Int Int)) (v_ArrVal_1895 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1896) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1895) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_1897) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 4)))) is different from false [2022-11-16 12:08:24,402 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1897 (Array Int Int)) (v_ArrVal_1896 (Array Int Int)) (v_ArrVal_1895 (Array Int Int))) (<= 0 (+ 4 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1896) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1895) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) v_ArrVal_1897) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)))) (forall ((v_ArrVal_1898 (Array Int Int)) (v_ArrVal_1897 (Array Int Int)) (v_ArrVal_1896 (Array Int Int)) (v_ArrVal_1895 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1895))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) (<= (+ 8 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1896) .cse0 v_ArrVal_1897) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_1898) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))))))) is different from false [2022-11-16 12:08:24,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:24,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2022-11-16 12:08:24,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:24,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-16 12:08:24,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-16 12:08:24,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2022-11-16 12:08:24,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 194 [2022-11-16 12:08:24,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 182 [2022-11-16 12:08:24,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 114 [2022-11-16 12:08:24,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:24,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2022-11-16 12:08:24,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:24,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2022-11-16 12:08:24,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:08:24,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2022-11-16 12:08:24,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:08:24,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:08:24,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2022-11-16 12:08:32,994 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 31 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:08:32,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801811029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:32,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:08:32,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 47 [2022-11-16 12:08:32,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937669160] [2022-11-16 12:08:32,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:32,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 12:08:32,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:32,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 12:08:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2987, Unknown=38, NotChecked=812, Total=4032 [2022-11-16 12:08:33,002 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 48 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 42 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:08:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:35,937 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2022-11-16 12:08:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:08:35,939 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 42 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-11-16 12:08:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:35,940 INFO L225 Difference]: With dead ends: 124 [2022-11-16 12:08:35,940 INFO L226 Difference]: Without dead ends: 124 [2022-11-16 12:08:35,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=408, Invalid=4551, Unknown=39, NotChecked=1008, Total=6006 [2022-11-16 12:08:35,944 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 582 mSDsluCounter, 2049 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 2127 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:35,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 2127 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1193 Invalid, 0 Unknown, 100 Unchecked, 1.1s Time] [2022-11-16 12:08:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-16 12:08:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 84. [2022-11-16 12:08:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 80 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:08:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2022-11-16 12:08:35,949 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 48 [2022-11-16 12:08:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:35,949 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2022-11-16 12:08:35,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 42 states have internal predecessors, (84), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:08:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2022-11-16 12:08:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 12:08:35,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:35,951 INFO L195 NwaCegarLoop]: 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] [2022-11-16 12:08:35,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:36,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:08:36,158 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:36,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:36,159 INFO L85 PathProgramCache]: Analyzing trace with hash -74907051, now seen corresponding path program 1 times [2022-11-16 12:08:36,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:36,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585792652] [2022-11-16 12:08:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:36,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:36,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:36,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:08:36,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:36,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585792652] [2022-11-16 12:08:36,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585792652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:36,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454419469] [2022-11-16 12:08:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:36,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:36,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:36,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:36,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:08:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:08:36,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:08:36,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:08:36,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454419469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:08:36,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:08:36,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2022-11-16 12:08:36,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437642684] [2022-11-16 12:08:36,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:08:36,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:08:36,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:36,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:08:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:08:36,809 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:36,870 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-11-16 12:08:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:08:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-11-16 12:08:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:36,872 INFO L225 Difference]: With dead ends: 86 [2022-11-16 12:08:36,872 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 12:08:36,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:08:36,874 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 74 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:36,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 191 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:08:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 12:08:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-11-16 12:08:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 80 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:08:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2022-11-16 12:08:36,879 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 49 [2022-11-16 12:08:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:36,879 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2022-11-16 12:08:36,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:08:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2022-11-16 12:08:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 12:08:36,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:36,883 INFO L195 NwaCegarLoop]: 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] [2022-11-16 12:08:36,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:37,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:37,090 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash 836425368, now seen corresponding path program 1 times [2022-11-16 12:08:37,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103831198] [2022-11-16 12:08:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:37,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:40,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:40,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:08:40,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:40,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103831198] [2022-11-16 12:08:40,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103831198] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:40,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338654184] [2022-11-16 12:08:40,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:40,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:40,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:40,529 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:40,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:08:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:40,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-16 12:08:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:40,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:08:41,311 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:08:41,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:08:41,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:08:41,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:08:41,592 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:08:41,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-16 12:08:41,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-16 12:08:42,131 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:08:42,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-11-16 12:08:42,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-16 12:08:42,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-16 12:08:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:42,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2022-11-16 12:08:42,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 12:08:42,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:42,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-16 12:08:42,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-11-16 12:08:42,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 12:08:42,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 12:08:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:08:42,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:43,532 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (.cse2 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4)) (.cse0 (* |c_ULTIMATE.start_main_~len~0#1| 2))) (and (forall ((v_ArrVal_2182 Int) (v_ArrVal_2184 (Array Int Int)) (v_ArrVal_2181 Int)) (<= .cse0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2184) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse1 .cse2 v_ArrVal_2182)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse3 .cse2 v_ArrVal_2181)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4)) 1))) (forall ((v_ArrVal_2182 Int) (v_ArrVal_2184 (Array Int Int)) (v_ArrVal_2181 Int)) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2184) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse1 .cse2 v_ArrVal_2182)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store .cse3 .cse2 v_ArrVal_2181)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4)) 1) .cse0)))) is different from false [2022-11-16 12:08:44,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:44,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2022-11-16 12:08:44,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:44,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 103 [2022-11-16 12:08:44,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-11-16 12:08:44,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:44,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2022-11-16 12:08:44,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:44,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 103 [2022-11-16 12:08:44,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-11-16 12:08:44,262 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse0 (+ |c_ULTIMATE.start_sll_circular_update_at_~data#1| 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2177 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2177) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2181) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|)))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2178 (Array Int Int)) (v_ArrVal_2182 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2178) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2182) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|))))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int)) (or (forall ((v_ArrVal_2178 (Array Int Int)) (v_ArrVal_2182 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2178) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2182) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_main_~s~0#1.offset|))))) is different from false [2022-11-16 12:08:44,350 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse0 (+ |c_ULTIMATE.start_sll_circular_update_at_~data#1| 1))) (and (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2178 (Array Int Int)) (v_ArrVal_2182 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base| v_ArrVal_2178) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2182) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|))))) (<= .cse0 .cse1) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2177 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base| v_ArrVal_2177) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2181) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.offset|)))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2178 (Array Int Int)) (v_ArrVal_2182 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base| v_ArrVal_2178) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2182) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base|)))) (<= .cse1 .cse0))) is different from false [2022-11-16 12:08:44,399 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse1 (+ |c_ULTIMATE.start_sll_circular_update_at_~data#1| 1)) (.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2178 (Array Int Int)) (v_ArrVal_2182 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2178) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2182) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (<= .cse1 .cse2) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int)) (or (forall ((v_ArrVal_2177 (Array Int Int)) (v_ArrVal_2181 Int)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2177) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2181) |c_ULTIMATE.start_main_~s~0#1.offset|))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_main_~s~0#1.offset|))) (<= .cse2 .cse1) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2178 (Array Int Int)) (v_ArrVal_2182 Int)) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2178) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2182) |c_ULTIMATE.start_main_~s~0#1.offset|))))))) is different from false [2022-11-16 12:08:45,110 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| Int) (v_ArrVal_2178 (Array Int Int)) (v_ArrVal_2182 Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2178) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_24| 4) v_ArrVal_2182) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))) is different from false [2022-11-16 12:08:45,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:45,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 12:08:45,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 267 [2022-11-16 12:08:45,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:08:45,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 232 [2022-11-16 12:08:45,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:08:45,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 211 [2022-11-16 12:08:45,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:08:45,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 144 [2022-11-16 12:08:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-16 12:08:46,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338654184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:46,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:46,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 81 [2022-11-16 12:08:46,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834363874] [2022-11-16 12:08:46,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:46,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-16 12:08:46,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-16 12:08:46,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=5326, Unknown=119, NotChecked=760, Total=6480 [2022-11-16 12:08:46,468 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 81 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 72 states have internal predecessors, (130), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:08:56,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:56,421 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-11-16 12:08:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-16 12:08:56,422 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 72 states have internal predecessors, (130), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2022-11-16 12:08:56,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:56,423 INFO L225 Difference]: With dead ends: 86 [2022-11-16 12:08:56,423 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 12:08:56,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 2515 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=624, Invalid=9174, Unknown=122, NotChecked=1000, Total=10920 [2022-11-16 12:08:56,428 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 361 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:56,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 1904 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1596 Invalid, 0 Unknown, 587 Unchecked, 1.4s Time] [2022-11-16 12:08:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 12:08:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2022-11-16 12:08:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 80 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:08:56,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2022-11-16 12:08:56,432 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 52 [2022-11-16 12:08:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:56,433 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2022-11-16 12:08:56,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 72 states have internal predecessors, (130), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-16 12:08:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2022-11-16 12:08:56,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:08:56,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:56,435 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-11-16 12:08:56,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:56,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:56,642 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:08:56,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:56,642 INFO L85 PathProgramCache]: Analyzing trace with hash -368684005, now seen corresponding path program 1 times [2022-11-16 12:08:56,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:56,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512674625] [2022-11-16 12:08:56,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:56,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:57,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:08:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:57,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:08:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:08:58,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:58,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512674625] [2022-11-16 12:08:58,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512674625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37285904] [2022-11-16 12:08:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:58,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:58,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:58,032 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:58,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:08:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:58,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 12:08:58,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:58,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 12:08:59,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 12:08:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:08:59,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:59,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-11-16 12:08:59,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 12:08:59,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37285904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:59,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:59,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 12] total 39 [2022-11-16 12:08:59,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817200411] [2022-11-16 12:08:59,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:59,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:08:59,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:08:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1368, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 12:08:59,887 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 37 states have internal predecessors, (135), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 12:09:01,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:01,858 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-11-16 12:09:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:09:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 37 states have internal predecessors, (135), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2022-11-16 12:09:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:01,860 INFO L225 Difference]: With dead ends: 118 [2022-11-16 12:09:01,860 INFO L226 Difference]: Without dead ends: 118 [2022-11-16 12:09:01,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=351, Invalid=2301, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:09:01,862 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 957 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:01,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 1063 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:09:01,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-16 12:09:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2022-11-16 12:09:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 84 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-11-16 12:09:01,874 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 59 [2022-11-16 12:09:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:01,875 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-11-16 12:09:01,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 37 states have internal predecessors, (135), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-16 12:09:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-11-16 12:09:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:09:01,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:01,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-11-16 12:09:01,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:02,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:09:02,088 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2070538002, now seen corresponding path program 2 times [2022-11-16 12:09:02,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:02,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539763922] [2022-11-16 12:09:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:09:02,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539763922] [2022-11-16 12:09:02,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539763922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:02,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605923996] [2022-11-16 12:09:02,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:02,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:02,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:02,324 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:02,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:09:02,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:09:02,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:02,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:09:02,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:09:02,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 12:09:02,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605923996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:02,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:02,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 8 [2022-11-16 12:09:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067610220] [2022-11-16 12:09:02,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:02,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:09:02,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:09:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:09:02,856 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:09:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:03,026 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-11-16 12:09:03,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:09:03,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-11-16 12:09:03,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:03,027 INFO L225 Difference]: With dead ends: 79 [2022-11-16 12:09:03,027 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 12:09:03,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 123 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:09:03,028 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 147 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:03,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 220 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:09:03,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 12:09:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-16 12:09:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-11-16 12:09:03,032 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 62 [2022-11-16 12:09:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:03,032 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-11-16 12:09:03,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:09:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-11-16 12:09:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:09:03,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:03,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2022-11-16 12:09:03,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:03,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:03,240 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:03,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 424234897, now seen corresponding path program 1 times [2022-11-16 12:09:03,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:03,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729304031] [2022-11-16 12:09:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 12:09:03,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:03,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729304031] [2022-11-16 12:09:03,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729304031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:03,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:03,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:09:03,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024574113] [2022-11-16 12:09:03,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:03,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:09:03,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:03,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:09:03,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:09:03,546 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:09:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:03,927 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-11-16 12:09:03,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:09:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-11-16 12:09:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:03,928 INFO L225 Difference]: With dead ends: 97 [2022-11-16 12:09:03,929 INFO L226 Difference]: Without dead ends: 97 [2022-11-16 12:09:03,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:09:03,929 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 187 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:03,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 258 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:09:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-16 12:09:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2022-11-16 12:09:03,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2022-11-16 12:09:03,933 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 63 [2022-11-16 12:09:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:03,934 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2022-11-16 12:09:03,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:09:03,934 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2022-11-16 12:09:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 12:09:03,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:03,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2022-11-16 12:09:03,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 12:09:03,935 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash 424234898, now seen corresponding path program 1 times [2022-11-16 12:09:03,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:03,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033104706] [2022-11-16 12:09:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:03,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:04,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:04,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:09:04,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:04,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033104706] [2022-11-16 12:09:04,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033104706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:04,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:04,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:09:04,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314278720] [2022-11-16 12:09:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:04,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:09:04,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:04,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:09:04,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:09:04,418 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 11 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:09:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:04,782 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-11-16 12:09:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:09:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-11-16 12:09:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:04,783 INFO L225 Difference]: With dead ends: 80 [2022-11-16 12:09:04,783 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 12:09:04,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:09:04,784 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 191 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:04,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 201 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:09:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 12:09:04,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-16 12:09:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:04,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-16 12:09:04,789 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 63 [2022-11-16 12:09:04,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:04,789 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-16 12:09:04,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:09:04,790 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-16 12:09:04,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 12:09:04,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:04,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1] [2022-11-16 12:09:04,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 12:09:04,791 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:04,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:04,791 INFO L85 PathProgramCache]: Analyzing trace with hash 266413795, now seen corresponding path program 1 times [2022-11-16 12:09:04,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:04,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485756387] [2022-11-16 12:09:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:04,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:04,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:05,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:09:05,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:05,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485756387] [2022-11-16 12:09:05,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485756387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:05,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:05,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 12:09:05,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983030761] [2022-11-16 12:09:05,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:05,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:09:05,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:05,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:09:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:09:05,073 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:09:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:05,310 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-11-16 12:09:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:09:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 64 [2022-11-16 12:09:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:05,313 INFO L225 Difference]: With dead ends: 80 [2022-11-16 12:09:05,313 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 12:09:05,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:09:05,315 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 187 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:05,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 257 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:09:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 12:09:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-16 12:09:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.173913043478261) internal successors, (81), 76 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2022-11-16 12:09:05,326 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 64 [2022-11-16 12:09:05,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:05,329 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2022-11-16 12:09:05,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:09:05,329 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2022-11-16 12:09:05,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 12:09:05,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:05,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1] [2022-11-16 12:09:05,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 12:09:05,331 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1706854879, now seen corresponding path program 1 times [2022-11-16 12:09:05,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833184922] [2022-11-16 12:09:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:05,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:05,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:05,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:09:05,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:05,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833184922] [2022-11-16 12:09:05,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833184922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:05,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743812223] [2022-11-16 12:09:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:05,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:05,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:05,696 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:05,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:09:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:06,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 12:09:06,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:06,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-16 12:09:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:09:06,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:06,827 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 12:09:06,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-16 12:09:06,961 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-16 12:09:06,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:09:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:09:07,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743812223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:07,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:07,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 8] total 26 [2022-11-16 12:09:07,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697522800] [2022-11-16 12:09:07,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:07,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:09:07,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:09:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:09:07,077 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 states have internal predecessors, (105), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:09:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:07,962 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-11-16 12:09:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:09:07,962 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 states have internal predecessors, (105), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 66 [2022-11-16 12:09:07,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:07,963 INFO L225 Difference]: With dead ends: 88 [2022-11-16 12:09:07,963 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 12:09:07,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 12:09:07,965 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 442 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:07,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 447 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:09:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 12:09:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2022-11-16 12:09:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 76 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-16 12:09:07,969 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 66 [2022-11-16 12:09:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:07,969 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-16 12:09:07,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 states have internal predecessors, (105), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-16 12:09:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-16 12:09:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 12:09:07,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:07,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1] [2022-11-16 12:09:07,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:08,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 12:09:08,178 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:08,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:08,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1706854878, now seen corresponding path program 1 times [2022-11-16 12:09:08,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:08,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949852970] [2022-11-16 12:09:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:09,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:09:10,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949852970] [2022-11-16 12:09:10,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949852970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:10,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032862831] [2022-11-16 12:09:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:10,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:10,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:10,112 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:10,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:09:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-16 12:09:10,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:10,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:09:10,710 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:09:10,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:09:10,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:09:10,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:09:11,060 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:09:11,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-16 12:09:11,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 12:09:11,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-16 12:09:11,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:09:11,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:11,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 12:09:12,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-16 12:09:12,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-16 12:09:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:09:12,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:13,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:13,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-11-16 12:09:13,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:13,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-16 12:09:14,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:14,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-16 12:09:14,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:14,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 12:09:14,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 42 [2022-11-16 12:09:14,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 238 [2022-11-16 12:09:15,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 226 [2022-11-16 12:09:15,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 210 [2022-11-16 12:09:15,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 98 [2022-11-16 12:09:15,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032862831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:15,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:15,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 51 [2022-11-16 12:09:15,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493564825] [2022-11-16 12:09:15,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:15,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 12:09:15,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 12:09:15,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=4827, Unknown=9, NotChecked=0, Total=5112 [2022-11-16 12:09:15,503 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 52 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 47 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:09:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:19,014 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-11-16 12:09:19,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:09:19,015 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 47 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-11-16 12:09:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:19,015 INFO L225 Difference]: With dead ends: 89 [2022-11-16 12:09:19,016 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 12:09:19,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=668, Invalid=7513, Unknown=9, NotChecked=0, Total=8190 [2022-11-16 12:09:19,019 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 548 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:19,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 996 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1384 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 12:09:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 12:09:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2022-11-16 12:09:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 78 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2022-11-16 12:09:19,023 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 66 [2022-11-16 12:09:19,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:19,023 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2022-11-16 12:09:19,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 47 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 12:09:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2022-11-16 12:09:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:09:19,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:19,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:19,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:19,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:19,232 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:19,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1372895080, now seen corresponding path program 1 times [2022-11-16 12:09:19,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:19,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798689601] [2022-11-16 12:09:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:19,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 12:09:19,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:19,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798689601] [2022-11-16 12:09:19,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798689601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:09:19,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:09:19,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:09:19,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054704042] [2022-11-16 12:09:19,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:09:19,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:09:19,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:19,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:09:19,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:09:19,582 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 11 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:09:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:19,902 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2022-11-16 12:09:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:09:19,903 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2022-11-16 12:09:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:19,904 INFO L225 Difference]: With dead ends: 81 [2022-11-16 12:09:19,904 INFO L226 Difference]: Without dead ends: 81 [2022-11-16 12:09:19,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:09:19,904 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 172 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:19,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 222 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:09:19,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-16 12:09:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-16 12:09:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.125) internal successors, (81), 77 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-11-16 12:09:19,910 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 67 [2022-11-16 12:09:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:19,910 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-11-16 12:09:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-16 12:09:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-11-16 12:09:19,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 12:09:19,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:19,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:19,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 12:09:19,913 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:19,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash -795789539, now seen corresponding path program 1 times [2022-11-16 12:09:19,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:19,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701762892] [2022-11-16 12:09:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:19,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:21,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:21,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:09:21,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701762892] [2022-11-16 12:09:21,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701762892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856054324] [2022-11-16 12:09:21,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:21,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:21,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:21,612 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:21,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:09:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:22,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-16 12:09:22,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:22,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:09:22,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:09:22,273 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:09:22,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:09:22,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:09:22,442 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:09:22,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 12:09:22,778 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:09:22,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 12:09:22,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:22,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-16 12:09:23,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 12:09:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 12:09:23,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:24,143 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3183 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_3183) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-16 12:09:24,414 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3182 (Array Int Int)) (v_ArrVal_3183 (Array Int Int))) (<= (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_3182))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_3183)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-16 12:09:24,430 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3182 (Array Int Int)) (v_ArrVal_3183 (Array Int Int))) (<= (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_3182))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) v_ArrVal_3183)) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-16 12:09:24,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:24,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-11-16 12:09:24,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 120 [2022-11-16 12:09:24,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 106 [2022-11-16 12:09:24,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2022-11-16 12:09:24,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856054324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:24,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:09:24,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 33 [2022-11-16 12:09:24,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353311300] [2022-11-16 12:09:24,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:24,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:09:24,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:24,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:09:24,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1699, Unknown=55, NotChecked=258, Total=2162 [2022-11-16 12:09:24,839 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 30 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:26,816 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2022-11-16 12:09:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:09:26,816 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 30 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-11-16 12:09:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:26,817 INFO L225 Difference]: With dead ends: 86 [2022-11-16 12:09:26,818 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 12:09:26,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=326, Invalid=2822, Unknown=56, NotChecked=336, Total=3540 [2022-11-16 12:09:26,819 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 136 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:26,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 606 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:09:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 12:09:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-11-16 12:09:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 78 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-11-16 12:09:26,823 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 69 [2022-11-16 12:09:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:26,824 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-11-16 12:09:26,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.878787878787879) internal successors, (95), 30 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-11-16 12:09:26,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 12:09:26,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:26,825 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:26,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 12:09:27,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:27,032 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1056399479, now seen corresponding path program 1 times [2022-11-16 12:09:27,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:27,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958503115] [2022-11-16 12:09:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:27,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-16 12:09:28,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:28,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958503115] [2022-11-16 12:09:28,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958503115] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:28,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890005853] [2022-11-16 12:09:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:28,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:28,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:28,386 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:28,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:09:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:28,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-16 12:09:28,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:28,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:09:28,876 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:09:28,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:09:28,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:09:29,106 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:09:29,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-16 12:09:29,368 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 12:09:29,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-16 12:09:29,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-16 12:09:29,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:29,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-11-16 12:09:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:09:29,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:30,324 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3325 Int) (v_ArrVal_3324 (Array Int Int))) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_3324) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4) v_ArrVal_3325) 0)))) is different from false [2022-11-16 12:09:30,337 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3325 Int) (v_ArrVal_3324 (Array Int Int))) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_#t~mem12#1.base| v_ArrVal_3324) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4) v_ArrVal_3325) 0) |c_ULTIMATE.start_main_~s~0#1.base|))) is different from false [2022-11-16 12:09:32,643 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3325 Int) (v_ArrVal_3324 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_circular_create_#res#1.base| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_#res#1.base|) |c_ULTIMATE.start_sll_circular_create_#res#1.offset|) v_ArrVal_3324) |c_ULTIMATE.start_sll_circular_create_#res#1.base|) (+ |c_ULTIMATE.start_sll_circular_create_#res#1.offset| 4) v_ArrVal_3325) 0)))) is different from false [2022-11-16 12:09:32,651 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3325 Int) (v_ArrVal_3324 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_3324) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset| 4) v_ArrVal_3325) 0)))) is different from false [2022-11-16 12:09:32,835 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3323 (Array Int Int)) (v_ArrVal_3325 Int) (v_ArrVal_3324 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_3323))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) v_ArrVal_3324)) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) (+ 4 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) v_ArrVal_3325) 0)))) is different from false [2022-11-16 12:09:32,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:32,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-16 12:09:32,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 285 treesize of output 267 [2022-11-16 12:09:32,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:32,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 286 treesize of output 279 [2022-11-16 12:09:32,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 314 [2022-11-16 12:09:32,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:09:32,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 347 treesize of output 337 [2022-11-16 12:09:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 3 not checked. [2022-11-16 12:09:33,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890005853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:33,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:33,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 26] total 58 [2022-11-16 12:09:33,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892695566] [2022-11-16 12:09:33,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:33,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 12:09:33,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:33,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 12:09:33,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2531, Unknown=55, NotChecked=530, Total=3306 [2022-11-16 12:09:33,889 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 58 states, 58 states have (on average 2.310344827586207) internal successors, (134), 51 states have internal predecessors, (134), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 12:09:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:35,890 INFO L93 Difference]: Finished difference Result 125 states and 131 transitions. [2022-11-16 12:09:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:09:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.310344827586207) internal successors, (134), 51 states have internal predecessors, (134), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 70 [2022-11-16 12:09:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:35,892 INFO L225 Difference]: With dead ends: 125 [2022-11-16 12:09:35,892 INFO L226 Difference]: Without dead ends: 125 [2022-11-16 12:09:35,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 108 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=358, Invalid=4160, Unknown=58, NotChecked=680, Total=5256 [2022-11-16 12:09:35,894 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 227 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 719 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:35,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 1022 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 811 Invalid, 0 Unknown, 719 Unchecked, 0.7s Time] [2022-11-16 12:09:35,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-16 12:09:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2022-11-16 12:09:35,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:09:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-11-16 12:09:35,898 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 70 [2022-11-16 12:09:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:35,898 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-11-16 12:09:35,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.310344827586207) internal successors, (134), 51 states have internal predecessors, (134), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 12:09:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-11-16 12:09:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-16 12:09:35,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:35,900 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:35,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:36,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 12:09:36,104 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-16 12:09:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash 853476134, now seen corresponding path program 1 times [2022-11-16 12:09:36,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:36,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680118080] [2022-11-16 12:09:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:36,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:38,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:09:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:38,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 12:09:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:09:38,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:38,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680118080] [2022-11-16 12:09:38,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680118080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:38,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760761927] [2022-11-16 12:09:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:38,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:38,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:38,840 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:38,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63d428b2-deb9-4080-9418-c83693d04a50/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:09:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:39,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-16 12:09:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:39,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:09:39,579 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 12:09:39,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 12:09:39,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:09:39,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:09:40,088 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 12:09:40,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2022-11-16 12:09:40,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 12:09:40,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 12:09:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:40,966 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:09:40,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2022-11-16 12:09:41,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:41,291 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 12:09:41,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-11-16 12:09:42,224 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-16 12:09:42,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2022-11-16 12:09:42,685 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-16 12:09:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 12:09:42,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:39,594 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (let ((.cse5 (select .cse3 .cse4))) (and (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| Int) (|ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| Int) (v_ArrVal_3469 (Array Int Int)) (v_ArrVal_3474 Int) (v_ArrVal_3475 Int) (v_ArrVal_3472 Int) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| Int)) (let ((.cse1 (store .cse3 .cse4 (store .cse5 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| 4) v_ArrVal_3472)))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| 4) v_ArrVal_3474))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (or (= (select (store |c_#valid| .cse0 v_ArrVal_3475) (select (select (store .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse2) .cse0) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)) 1) (not (<= 0 |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| 0)) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_3469) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| Int) (|ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| Int) (v_ArrVal_3469 (Array Int Int)) (v_ArrVal_3474 Int) (v_ArrVal_3475 Int) (v_ArrVal_3472 Int) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| Int)) (or (= (let ((.cse7 (store .cse3 .cse4 (store .cse5 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| 4) v_ArrVal_3472)))) (let ((.cse8 (store (select .cse7 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| 4) v_ArrVal_3474))) (let ((.cse6 (select .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (select (store |c_#valid| .cse6 v_ArrVal_3475) (select (select (store .cse7 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse8) .cse6) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|))))) 1) (not (<= 0 |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| 0)) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset| |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_3469) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))))) is different from false [2022-11-16 12:13:40,060 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) (let ((.cse5 (select .cse3 .cse4))) (and (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| Int) (|ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| Int) (v_ArrVal_3469 (Array Int Int)) (v_ArrVal_3474 Int) (v_ArrVal_3475 Int) (v_ArrVal_3472 Int) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| Int)) (let ((.cse1 (store .cse3 .cse4 (store .cse5 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| 4) v_ArrVal_3472)))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| 4) v_ArrVal_3474))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) (or (= |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base| .cse0) (not (<= 0 |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| 0)) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_3469) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (= (select (store |c_#valid| .cse0 v_ArrVal_3475) (select (select (store .cse1 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base| .cse2) .cse0) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)) 1)))))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| Int) (|ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| Int) (v_ArrVal_3469 (Array Int Int)) (v_ArrVal_3474 Int) (v_ArrVal_3475 Int) (v_ArrVal_3472 Int) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| Int)) (or (not (<= 0 |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| 0)) (= |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_3469) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (= (let ((.cse7 (store .cse3 .cse4 (store .cse5 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_43| 4) v_ArrVal_3472)))) (let ((.cse8 (store (select .cse7 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| 4) v_ArrVal_3474))) (let ((.cse6 (select .cse8 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))) (select (store |c_#valid| .cse6 v_ArrVal_3475) (select (select (store .cse7 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base| .cse8) .cse6) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|))))) 1))))))) is different from false [2022-11-16 12:13:45,017 INFO L321 Elim1Store]: treesize reduction 947, result has 38.2 percent of original size [2022-11-16 12:13:45,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 11 new quantified variables, introduced 26 case distinctions, treesize of input 94627 treesize of output 43596 [2022-11-16 12:13:48,399 INFO L321 Elim1Store]: treesize reduction 1138, result has 26.6 percent of original size [2022-11-16 12:13:48,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 56 case distinctions, treesize of input 1946837 treesize of output 1863792 [2022-11-16 12:13:55,642 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification. DAG size of input: 2840 DAG size of output: 2839 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 12:14:01,527 INFO L321 Elim1Store]: treesize reduction 195, result has 62.0 percent of original size [2022-11-16 12:14:01,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 971491 treesize of output 898719 [2022-11-16 12:14:10,073 WARN L233 SmtUtils]: Spent 8.54s on a formula simplification. DAG size of input: 2900 DAG size of output: 2897 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 12:14:15,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:14:15,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61206 treesize of output 61199 [2022-11-16 12:14:24,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61220 treesize of output 61208 [2022-11-16 12:14:29,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61204 treesize of output 61202 [2022-11-16 12:14:33,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61202 treesize of output 61200