./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa --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 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:57:10,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:57:10,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:57:10,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:57:10,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:57:10,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:57:10,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:57:10,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:57:10,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:57:10,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:57:10,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:57:10,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:57:10,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:57:10,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:57:10,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:57:10,648 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:57:10,649 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:57:10,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:57:10,652 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:57:10,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:57:10,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:57:10,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:57:10,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:57:10,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:57:10,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:57:10,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:57:10,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:57:10,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:57:10,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:57:10,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:57:10,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:57:10,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:57:10,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:57:10,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:57:10,666 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:57:10,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:57:10,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:57:10,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:57:10,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:57:10,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:57:10,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:57:10,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 19:57:10,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:57:10,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:57:10,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:57:10,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:57:10,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:57:10,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:57:10,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:57:10,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:57:10,688 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:57:10,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:57:10,689 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:57:10,689 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 19:57:10,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:57:10,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:57:10,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:57:10,689 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 19:57:10,689 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 19:57:10,689 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 19:57:10,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:57:10,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:57:10,690 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:57:10,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:57:10,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:57:10,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:57:10,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:57:10,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:57:10,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:57:10,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:57:10,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:57:10,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:57:10,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:57:10,691 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_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 [2021-12-06 19:57:10,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:57:10,885 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:57:10,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:57:10,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:57:10,888 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:57:10,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2021-12-06 19:57:10,935 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data/ef3e7a34c/3cc4281c02504f4cbaf348c107cc0c6e/FLAG22c932e57 [2021-12-06 19:57:11,343 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:57:11,344 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2021-12-06 19:57:11,356 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data/ef3e7a34c/3cc4281c02504f4cbaf348c107cc0c6e/FLAG22c932e57 [2021-12-06 19:57:11,369 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data/ef3e7a34c/3cc4281c02504f4cbaf348c107cc0c6e [2021-12-06 19:57:11,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:57:11,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:57:11,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:57:11,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:57:11,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:57:11,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b047eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11, skipping insertion in model container [2021-12-06 19:57:11,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:57:11,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:57:11,625 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:57:11,632 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:57:11,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:57:11,691 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:57:11,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11 WrapperNode [2021-12-06 19:57:11,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:57:11,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:57:11,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:57:11,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:57:11,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,748 INFO L137 Inliner]: procedures = 125, calls = 94, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 304 [2021-12-06 19:57:11,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:57:11,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:57:11,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:57:11,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:57:11,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:57:11,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:57:11,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:57:11,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:57:11,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (1/1) ... [2021-12-06 19:57:11,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:57:11,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:11,813 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:57:11,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:57:11,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:57:11,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:57:11,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:57:11,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:57:11,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:57:11,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:57:11,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:57:11,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:57:11,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:57:11,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:57:11,843 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-12-06 19:57:11,843 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-12-06 19:57:11,924 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:57:11,925 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:57:12,354 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:57:12,363 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:57:12,363 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-06 19:57:12,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:57:12 BoogieIcfgContainer [2021-12-06 19:57:12,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:57:12,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:57:12,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:57:12,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:57:12,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:57:11" (1/3) ... [2021-12-06 19:57:12,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb64a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:57:12, skipping insertion in model container [2021-12-06 19:57:12,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:57:11" (2/3) ... [2021-12-06 19:57:12,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb64a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:57:12, skipping insertion in model container [2021-12-06 19:57:12,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:57:12" (3/3) ... [2021-12-06 19:57:12,371 INFO L111 eAbstractionObserver]: Analyzing ICFG split_list_test05-1.i [2021-12-06 19:57:12,375 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:57:12,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2021-12-06 19:57:12,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:57:12,418 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:57:12,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2021-12-06 19:57:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:57:12,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-06 19:57:12,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:12,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-06 19:57:12,440 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-06 19:57:12,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:12,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704395456] [2021-12-06 19:57:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:12,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:12,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:12,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704395456] [2021-12-06 19:57:12,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704395456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:12,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:12,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:57:12,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047650923] [2021-12-06 19:57:12,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:12,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:57:12,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:57:12,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:57:12,588 INFO L87 Difference]: Start difference. First operand has 323 states, 160 states have (on average 2.1375) internal successors, (342), 309 states have internal predecessors, (342), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:12,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:12,844 INFO L93 Difference]: Finished difference Result 548 states and 601 transitions. [2021-12-06 19:57:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:57:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-06 19:57:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:12,859 INFO L225 Difference]: With dead ends: 548 [2021-12-06 19:57:12,860 INFO L226 Difference]: Without dead ends: 546 [2021-12-06 19:57:12,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:57:12,865 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 246 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:12,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 449 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:57:12,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-06 19:57:12,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 407. [2021-12-06 19:57:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 247 states have (on average 2.0890688259109313) internal successors, (516), 393 states have internal predecessors, (516), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:57:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 544 transitions. [2021-12-06 19:57:12,921 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 544 transitions. Word has length 3 [2021-12-06 19:57:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:12,921 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 544 transitions. [2021-12-06 19:57:12,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 544 transitions. [2021-12-06 19:57:12,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-06 19:57:12,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:12,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-06 19:57:12,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:57:12,922 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:12,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-06 19:57:12,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:12,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585753759] [2021-12-06 19:57:12,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:12,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:12,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:12,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585753759] [2021-12-06 19:57:12,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585753759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:12,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:12,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:57:12,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192265654] [2021-12-06 19:57:12,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:12,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:57:12,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:57:12,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:57:12,963 INFO L87 Difference]: Start difference. First operand 407 states and 544 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:13,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:13,086 INFO L93 Difference]: Finished difference Result 408 states and 547 transitions. [2021-12-06 19:57:13,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:57:13,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-06 19:57:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:13,090 INFO L225 Difference]: With dead ends: 408 [2021-12-06 19:57:13,090 INFO L226 Difference]: Without dead ends: 408 [2021-12-06 19:57:13,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:57:13,091 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 6 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:13,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 567 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:57:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-06 19:57:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 405. [2021-12-06 19:57:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 247 states have (on average 2.080971659919028) internal successors, (514), 391 states have internal predecessors, (514), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:57:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 542 transitions. [2021-12-06 19:57:13,111 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 542 transitions. Word has length 3 [2021-12-06 19:57:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:13,112 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 542 transitions. [2021-12-06 19:57:13,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:57:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 542 transitions. [2021-12-06 19:57:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 19:57:13,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:13,112 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:13,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:57:13,113 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:13,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390162, now seen corresponding path program 1 times [2021-12-06 19:57:13,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:13,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534288093] [2021-12-06 19:57:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:13,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:13,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:13,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534288093] [2021-12-06 19:57:13,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534288093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:13,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:13,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:57:13,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577752385] [2021-12-06 19:57:13,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:13,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:57:13,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:13,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:57:13,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:57:13,157 INFO L87 Difference]: Start difference. First operand 405 states and 542 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-06 19:57:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:13,276 INFO L93 Difference]: Finished difference Result 400 states and 537 transitions. [2021-12-06 19:57:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:57:13,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-12-06 19:57:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:13,278 INFO L225 Difference]: With dead ends: 400 [2021-12-06 19:57:13,278 INFO L226 Difference]: Without dead ends: 400 [2021-12-06 19:57:13,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:57:13,280 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 43 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:13,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 497 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:57:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-06 19:57:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2021-12-06 19:57:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 247 states have (on average 2.0607287449392713) internal successors, (509), 386 states have internal predecessors, (509), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:57:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 537 transitions. [2021-12-06 19:57:13,295 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 537 transitions. Word has length 10 [2021-12-06 19:57:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:13,295 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 537 transitions. [2021-12-06 19:57:13,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-06 19:57:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 537 transitions. [2021-12-06 19:57:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 19:57:13,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:13,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:13,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:57:13,296 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:13,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1117390163, now seen corresponding path program 1 times [2021-12-06 19:57:13,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:13,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432552276] [2021-12-06 19:57:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:13,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:13,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:13,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:13,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432552276] [2021-12-06 19:57:13,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432552276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:13,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:13,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:57:13,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105943572] [2021-12-06 19:57:13,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:13,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:57:13,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:13,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:57:13,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:57:13,351 INFO L87 Difference]: Start difference. First operand 400 states and 537 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-06 19:57:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:13,467 INFO L93 Difference]: Finished difference Result 395 states and 532 transitions. [2021-12-06 19:57:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:57:13,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-12-06 19:57:13,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:13,470 INFO L225 Difference]: With dead ends: 395 [2021-12-06 19:57:13,471 INFO L226 Difference]: Without dead ends: 395 [2021-12-06 19:57:13,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:57:13,472 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 38 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:13,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 510 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:57:13,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-12-06 19:57:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 395. [2021-12-06 19:57:13,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 247 states have (on average 2.0404858299595143) internal successors, (504), 381 states have internal predecessors, (504), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:57:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 532 transitions. [2021-12-06 19:57:13,487 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 532 transitions. Word has length 10 [2021-12-06 19:57:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:13,487 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 532 transitions. [2021-12-06 19:57:13,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-06 19:57:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 532 transitions. [2021-12-06 19:57:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:57:13,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:13,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:13,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:57:13,488 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 279357079, now seen corresponding path program 1 times [2021-12-06 19:57:13,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:13,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905671545] [2021-12-06 19:57:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:13,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:13,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:13,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905671545] [2021-12-06 19:57:13,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905671545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:13,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:13,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:57:13,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097221137] [2021-12-06 19:57:13,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:13,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:57:13,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:13,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:57:13,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:57:13,566 INFO L87 Difference]: Start difference. First operand 395 states and 532 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-06 19:57:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:13,870 INFO L93 Difference]: Finished difference Result 523 states and 574 transitions. [2021-12-06 19:57:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:57:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2021-12-06 19:57:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:13,873 INFO L225 Difference]: With dead ends: 523 [2021-12-06 19:57:13,873 INFO L226 Difference]: Without dead ends: 523 [2021-12-06 19:57:13,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:57:13,874 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 318 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:13,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 806 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:57:13,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-06 19:57:13,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 387. [2021-12-06 19:57:13,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 247 states have (on average 2.0080971659919027) internal successors, (496), 373 states have internal predecessors, (496), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:57:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 524 transitions. [2021-12-06 19:57:13,885 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 524 transitions. Word has length 11 [2021-12-06 19:57:13,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:13,885 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 524 transitions. [2021-12-06 19:57:13,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-06 19:57:13,885 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 524 transitions. [2021-12-06 19:57:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:57:13,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:13,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:13,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:57:13,886 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:13,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:13,886 INFO L85 PathProgramCache]: Analyzing trace with hash 279357080, now seen corresponding path program 1 times [2021-12-06 19:57:13,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:13,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776476833] [2021-12-06 19:57:13,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:13,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:13,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:13,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776476833] [2021-12-06 19:57:13,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776476833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:13,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:13,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:57:13,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015759221] [2021-12-06 19:57:13,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:13,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:57:13,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:57:13,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:57:13,956 INFO L87 Difference]: Start difference. First operand 387 states and 524 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-06 19:57:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:14,361 INFO L93 Difference]: Finished difference Result 513 states and 564 transitions. [2021-12-06 19:57:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:57:14,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 11 [2021-12-06 19:57:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:14,364 INFO L225 Difference]: With dead ends: 513 [2021-12-06 19:57:14,364 INFO L226 Difference]: Without dead ends: 513 [2021-12-06 19:57:14,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:57:14,366 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 804 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:14,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 447 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:57:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-12-06 19:57:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 378. [2021-12-06 19:57:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 247 states have (on average 1.9676113360323886) internal successors, (486), 364 states have internal predecessors, (486), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:57:14,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 514 transitions. [2021-12-06 19:57:14,376 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 514 transitions. Word has length 11 [2021-12-06 19:57:14,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:14,376 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 514 transitions. [2021-12-06 19:57:14,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-12-06 19:57:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 514 transitions. [2021-12-06 19:57:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 19:57:14,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:14,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:14,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:57:14,377 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash 693745101, now seen corresponding path program 1 times [2021-12-06 19:57:14,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:14,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845951101] [2021-12-06 19:57:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:14,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:14,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845951101] [2021-12-06 19:57:14,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845951101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:14,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 19:57:14,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554658378] [2021-12-06 19:57:14,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:14,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:57:14,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:57:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:57:14,490 INFO L87 Difference]: Start difference. First operand 378 states and 514 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-12-06 19:57:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:14,699 INFO L93 Difference]: Finished difference Result 398 states and 537 transitions. [2021-12-06 19:57:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:57:14,700 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 20 [2021-12-06 19:57:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:14,702 INFO L225 Difference]: With dead ends: 398 [2021-12-06 19:57:14,702 INFO L226 Difference]: Without dead ends: 398 [2021-12-06 19:57:14,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:57:14,703 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 32 mSDsluCounter, 1269 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:14,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1583 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:57:14,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-12-06 19:57:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 386. [2021-12-06 19:57:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 254 states have (on average 1.9448818897637796) internal successors, (494), 371 states have internal predecessors, (494), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:57:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 524 transitions. [2021-12-06 19:57:14,713 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 524 transitions. Word has length 20 [2021-12-06 19:57:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:14,713 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 524 transitions. [2021-12-06 19:57:14,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-12-06 19:57:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 524 transitions. [2021-12-06 19:57:14,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 19:57:14,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:14,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:14,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:57:14,714 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:14,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:14,715 INFO L85 PathProgramCache]: Analyzing trace with hash -964577360, now seen corresponding path program 1 times [2021-12-06 19:57:14,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:14,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827501250] [2021-12-06 19:57:14,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:14,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:14,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827501250] [2021-12-06 19:57:14,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827501250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:14,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:57:14,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 19:57:14,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693410768] [2021-12-06 19:57:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 19:57:14,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 19:57:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:57:14,870 INFO L87 Difference]: Start difference. First operand 386 states and 524 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-12-06 19:57:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:15,317 INFO L93 Difference]: Finished difference Result 526 states and 579 transitions. [2021-12-06 19:57:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:57:15,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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 22 [2021-12-06 19:57:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:15,320 INFO L225 Difference]: With dead ends: 526 [2021-12-06 19:57:15,320 INFO L226 Difference]: Without dead ends: 526 [2021-12-06 19:57:15,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-06 19:57:15,320 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 753 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:15,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 1345 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:57:15,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-06 19:57:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 389. [2021-12-06 19:57:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 257 states have (on average 1.933852140077821) internal successors, (497), 374 states have internal predecessors, (497), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:57:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2021-12-06 19:57:15,332 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 22 [2021-12-06 19:57:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:15,332 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2021-12-06 19:57:15,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 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) [2021-12-06 19:57:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2021-12-06 19:57:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 19:57:15,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:15,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:15,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:57:15,334 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:15,334 INFO L85 PathProgramCache]: Analyzing trace with hash -339455757, now seen corresponding path program 1 times [2021-12-06 19:57:15,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:15,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940304495] [2021-12-06 19:57:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:15,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:15,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:57:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:15,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:15,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940304495] [2021-12-06 19:57:15,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940304495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:15,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687003389] [2021-12-06 19:57:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:15,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:15,657 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:15,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:57:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 19:57:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:15,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:57:16,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:57:16,074 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:16,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:57:16,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:57:16,164 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:16,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:57:16,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:16,297 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-06 19:57:16,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:57:16,445 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-12-06 19:57:16,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-12-06 19:57:16,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 19:57:16,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 19:57:16,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 19:57:16,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:16,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-12-06 19:57:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:16,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:16,790 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_322 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_322) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2021-12-06 19:57:17,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:17,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-12-06 19:57:17,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:17,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 218 [2021-12-06 19:57:17,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2021-12-06 19:57:17,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 79 [2021-12-06 19:57:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687003389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:18,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:57:18,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-12-06 19:57:18,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537069316] [2021-12-06 19:57:18,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:18,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 19:57:18,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 19:57:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1014, Unknown=2, NotChecked=64, Total=1190 [2021-12-06 19:57:18,810 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:19,720 INFO L93 Difference]: Finished difference Result 426 states and 578 transitions. [2021-12-06 19:57:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:57:19,721 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 4 states have call successors, (4), 4 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 37 [2021-12-06 19:57:19,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:19,725 INFO L225 Difference]: With dead ends: 426 [2021-12-06 19:57:19,725 INFO L226 Difference]: Without dead ends: 426 [2021-12-06 19:57:19,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=1542, Unknown=2, NotChecked=80, Total=1806 [2021-12-06 19:57:19,726 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 101 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 486 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:19,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 3383 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1568 Invalid, 0 Unknown, 486 Unchecked, 0.6s Time] [2021-12-06 19:57:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-12-06 19:57:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 420. [2021-12-06 19:57:19,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 286 states have (on average 1.8601398601398602) internal successors, (532), 404 states have internal predecessors, (532), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (28), 14 states have call predecessors, (28), 15 states have call successors, (28) [2021-12-06 19:57:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 575 transitions. [2021-12-06 19:57:19,745 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 575 transitions. Word has length 37 [2021-12-06 19:57:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:19,745 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 575 transitions. [2021-12-06 19:57:19,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 575 transitions. [2021-12-06 19:57:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 19:57:19,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:19,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:19,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:57:19,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:19,948 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:19,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:19,948 INFO L85 PathProgramCache]: Analyzing trace with hash -339455756, now seen corresponding path program 1 times [2021-12-06 19:57:19,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:19,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731324129] [2021-12-06 19:57:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:19,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:20,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:57:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:20,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:20,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731324129] [2021-12-06 19:57:20,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731324129] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:20,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661735882] [2021-12-06 19:57:20,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:20,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:20,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:20,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:20,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:57:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 19:57:20,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:57:20,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:57:20,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:57:20,600 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:20,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:57:20,609 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:20,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:57:20,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:57:20,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:57:20,705 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:20,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:57:20,716 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:20,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:57:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:20,908 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-06 19:57:20,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:57:21,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:57:21,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-12-06 19:57:21,052 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-12-06 19:57:21,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 19:57:21,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-12-06 19:57:21,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 19:57:21,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-12-06 19:57:21,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 19:57:21,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-12-06 19:57:21,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 19:57:21,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:21,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-12-06 19:57:21,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:21,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-12-06 19:57:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:21,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:21,398 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_510 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_510) c_append_~head.base) (+ c_append_~head.offset 4))))) (forall ((v_ArrVal_509 (Array Int Int)) (v_ArrVal_510 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ 9 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_510) c_append_~head.base) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_509) c_append_~head.base) .cse0)))))) is different from false [2021-12-06 19:57:22,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:22,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 83 [2021-12-06 19:57:22,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:22,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 73 [2021-12-06 19:57:22,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:22,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:22,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-06 19:57:22,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:22,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:22,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 140 [2021-12-06 19:57:22,086 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:22,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 229 [2021-12-06 19:57:22,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 205 [2021-12-06 19:57:22,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 185 [2021-12-06 19:57:23,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661735882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:23,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:57:23,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-12-06 19:57:23,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389075417] [2021-12-06 19:57:23,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:23,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 19:57:23,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 19:57:23,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1021, Unknown=2, NotChecked=64, Total=1190 [2021-12-06 19:57:23,933 INFO L87 Difference]: Start difference. First operand 420 states and 575 transitions. Second operand has 28 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:25,722 INFO L93 Difference]: Finished difference Result 474 states and 643 transitions. [2021-12-06 19:57:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 19:57:25,722 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (4), 4 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 37 [2021-12-06 19:57:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:25,726 INFO L225 Difference]: With dead ends: 474 [2021-12-06 19:57:25,726 INFO L226 Difference]: Without dead ends: 474 [2021-12-06 19:57:25,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=321, Invalid=2333, Unknown=2, NotChecked=100, Total=2756 [2021-12-06 19:57:25,727 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 168 mSDsluCounter, 2856 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 2785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1231 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:25,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 3178 Invalid, 2785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1485 Invalid, 0 Unknown, 1231 Unchecked, 0.7s Time] [2021-12-06 19:57:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-06 19:57:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 443. [2021-12-06 19:57:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 303 states have (on average 1.8217821782178218) internal successors, (552), 421 states have internal predecessors, (552), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (39), 19 states have call predecessors, (39), 20 states have call successors, (39) [2021-12-06 19:57:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 611 transitions. [2021-12-06 19:57:25,742 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 611 transitions. Word has length 37 [2021-12-06 19:57:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:25,742 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 611 transitions. [2021-12-06 19:57:25,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 24 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:25,743 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 611 transitions. [2021-12-06 19:57:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 19:57:25,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:25,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:25,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:57:25,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:57:25,945 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:25,945 INFO L85 PathProgramCache]: Analyzing trace with hash -794458392, now seen corresponding path program 1 times [2021-12-06 19:57:25,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:25,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366179028] [2021-12-06 19:57:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:25,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:26,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:57:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:26,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366179028] [2021-12-06 19:57:26,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366179028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:26,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880336072] [2021-12-06 19:57:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:26,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:26,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:26,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:26,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:57:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 19:57:26,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:26,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:57:26,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:57:26,410 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:26,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:57:26,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:57:26,448 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:26,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:57:26,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:26,501 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-06 19:57:26,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:57:26,591 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-12-06 19:57:26,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-12-06 19:57:26,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 19:57:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 19:57:26,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2021-12-06 19:57:26,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:26,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2021-12-06 19:57:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:26,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:26,904 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_698 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_698) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2021-12-06 19:57:27,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:27,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2021-12-06 19:57:27,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:27,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 218 [2021-12-06 19:57:27,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2021-12-06 19:57:27,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 158 [2021-12-06 19:57:27,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880336072] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:27,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:57:27,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-12-06 19:57:27,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818315854] [2021-12-06 19:57:27,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:27,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 19:57:27,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 19:57:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1006, Unknown=3, NotChecked=64, Total=1190 [2021-12-06 19:57:27,503 INFO L87 Difference]: Start difference. First operand 443 states and 611 transitions. Second operand has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:28,769 INFO L93 Difference]: Finished difference Result 597 states and 680 transitions. [2021-12-06 19:57:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:57:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 4 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 39 [2021-12-06 19:57:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:28,773 INFO L225 Difference]: With dead ends: 597 [2021-12-06 19:57:28,773 INFO L226 Difference]: Without dead ends: 597 [2021-12-06 19:57:28,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1701, Unknown=3, NotChecked=86, Total=2070 [2021-12-06 19:57:28,774 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 1116 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 2900 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:28,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 2900 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2284 Invalid, 0 Unknown, 389 Unchecked, 0.9s Time] [2021-12-06 19:57:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-12-06 19:57:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 448. [2021-12-06 19:57:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 308 states have (on average 1.7987012987012987) internal successors, (554), 426 states have internal predecessors, (554), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (39), 19 states have call predecessors, (39), 20 states have call successors, (39) [2021-12-06 19:57:28,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 613 transitions. [2021-12-06 19:57:28,785 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 613 transitions. Word has length 39 [2021-12-06 19:57:28,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:28,785 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 613 transitions. [2021-12-06 19:57:28,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 25 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:28,786 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 613 transitions. [2021-12-06 19:57:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 19:57:28,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:28,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:28,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:57:28,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:57:28,988 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash -794458391, now seen corresponding path program 1 times [2021-12-06 19:57:28,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:28,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436256286] [2021-12-06 19:57:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:28,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:29,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:57:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:29,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:29,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436256286] [2021-12-06 19:57:29,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436256286] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:29,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279684946] [2021-12-06 19:57:29,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:29,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:29,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:29,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:29,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:57:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:29,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 19:57:29,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:29,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:57:29,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:57:29,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:57:29,569 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:29,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:57:29,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:57:29,586 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:29,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:57:29,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:57:29,629 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:29,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:57:29,638 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:29,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:57:29,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:29,733 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-06 19:57:29,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2021-12-06 19:57:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:57:29,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-12-06 19:57:29,848 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-12-06 19:57:29,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 19:57:29,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-12-06 19:57:29,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 19:57:30,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-12-06 19:57:30,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 19:57:30,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-12-06 19:57:30,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 19:57:30,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:30,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-12-06 19:57:30,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:30,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2021-12-06 19:57:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:57:30,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:30,147 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_887 (Array Int Int)) (v_ArrVal_888 (Array Int Int))) (let ((.cse0 (+ c_append_~head.offset 4))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_888) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_887) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_888 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_888) c_append_~head.base) (+ c_append_~head.offset 4)) 5)))) is different from false [2021-12-06 19:57:30,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:30,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 83 [2021-12-06 19:57:30,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:30,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 73 [2021-12-06 19:57:30,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:30,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:30,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 103 [2021-12-06 19:57:30,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:57:30,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:30,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 140 [2021-12-06 19:57:30,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:57:30,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 215 treesize of output 229 [2021-12-06 19:57:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 209 [2021-12-06 19:57:30,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 185 [2021-12-06 19:57:32,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279684946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:32,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:57:32,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-06 19:57:32,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339569470] [2021-12-06 19:57:32,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:32,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 19:57:32,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 19:57:32,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=962, Unknown=2, NotChecked=62, Total=1122 [2021-12-06 19:57:32,665 INFO L87 Difference]: Start difference. First operand 448 states and 613 transitions. Second operand has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 23 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:34,909 INFO L93 Difference]: Finished difference Result 595 states and 676 transitions. [2021-12-06 19:57:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 19:57:34,909 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 23 states have internal predecessors, (71), 4 states have call successors, (4), 4 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 39 [2021-12-06 19:57:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:34,912 INFO L225 Difference]: With dead ends: 595 [2021-12-06 19:57:34,912 INFO L226 Difference]: Without dead ends: 595 [2021-12-06 19:57:34,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=261, Invalid=1811, Unknown=2, NotChecked=88, Total=2162 [2021-12-06 19:57:34,913 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 1085 mSDsluCounter, 2551 mSDsCounter, 0 mSdLazyCounter, 3325 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 3969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 511 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:34,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 2701 Invalid, 3969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3325 Invalid, 0 Unknown, 511 Unchecked, 1.4s Time] [2021-12-06 19:57:34,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-06 19:57:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 440. [2021-12-06 19:57:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 301 states have (on average 1.8073089700996678) internal successors, (544), 418 states have internal predecessors, (544), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (39), 19 states have call predecessors, (39), 20 states have call successors, (39) [2021-12-06 19:57:34,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 603 transitions. [2021-12-06 19:57:34,924 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 603 transitions. Word has length 39 [2021-12-06 19:57:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:34,924 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 603 transitions. [2021-12-06 19:57:34,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.730769230769231) internal successors, (71), 23 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:57:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 603 transitions. [2021-12-06 19:57:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 19:57:34,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:34,929 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:34,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:57:35,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:57:35,129 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:35,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:35,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2080045512, now seen corresponding path program 1 times [2021-12-06 19:57:35,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:35,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356853391] [2021-12-06 19:57:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:35,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:57:35,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:57:35,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 19:57:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:57:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 19:57:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 19:57:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 19:57:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 19:57:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 19:57:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-06 19:57:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-06 19:57:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-06 19:57:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-06 19:57:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-06 19:57:35,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-12-06 19:57:35,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356853391] [2021-12-06 19:57:35,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356853391] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888846429] [2021-12-06 19:57:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:35,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:35,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:35,368 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:35,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:57:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:35,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:57:35,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 869 trivial. 0 not checked. [2021-12-06 19:57:35,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:57:35,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888846429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:57:35,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:57:35,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-12-06 19:57:35,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992225263] [2021-12-06 19:57:35,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:57:35,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:57:35,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:57:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:57:35,814 INFO L87 Difference]: Start difference. First operand 440 states and 603 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 19:57:35,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:35,820 INFO L93 Difference]: Finished difference Result 442 states and 604 transitions. [2021-12-06 19:57:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:57:35,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 204 [2021-12-06 19:57:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:35,823 INFO L225 Difference]: With dead ends: 442 [2021-12-06 19:57:35,823 INFO L226 Difference]: Without dead ends: 442 [2021-12-06 19:57:35,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:57:35,823 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 0 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:35,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 641 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:57:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-12-06 19:57:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2021-12-06 19:57:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 303 states have (on average 1.7986798679867986) internal successors, (545), 420 states have internal predecessors, (545), 20 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (39), 19 states have call predecessors, (39), 20 states have call successors, (39) [2021-12-06 19:57:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 604 transitions. [2021-12-06 19:57:35,833 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 604 transitions. Word has length 204 [2021-12-06 19:57:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:35,834 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 604 transitions. [2021-12-06 19:57:35,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 19:57:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 604 transitions. [2021-12-06 19:57:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 19:57:35,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:35,836 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:35,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:57:36,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 19:57:36,037 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:36,038 INFO L85 PathProgramCache]: Analyzing trace with hash 729443525, now seen corresponding path program 1 times [2021-12-06 19:57:36,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:36,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161226007] [2021-12-06 19:57:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:36,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:57:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:57:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:57:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 19:57:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 19:57:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:57:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 19:57:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 19:57:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 19:57:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-06 19:57:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-06 19:57:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-06 19:57:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-12-06 19:57:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2021-12-06 19:57:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 314 proven. 11 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2021-12-06 19:57:36,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:36,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161226007] [2021-12-06 19:57:36,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161226007] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:36,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912189768] [2021-12-06 19:57:36,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:36,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:36,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:36,543 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:36,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:57:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:36,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 2014 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 19:57:36,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:37,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:57:37,092 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 19:57:37,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:57:37,115 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:37,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 19:57:37,119 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 19:57:37,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 19:57:37,152 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:37,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 19:57:37,202 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 19:57:37,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 19:57:37,288 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3653 (Array Int Int)) (append_~node~0.base Int)) (and (= 0 (select |c_old(#valid)| append_~node~0.base)) (= |c_append_#t~mem56.base| (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_3653) |c_append_#in~head.base|) |c_append_#in~head.offset|)))) is different from true [2021-12-06 19:57:42,970 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3653 (Array Int Int)) (append_~node~0.base Int)) (and (= 0 (select |c_old(#valid)| append_~node~0.base)) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_3653) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0))) is different from true [2021-12-06 19:57:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 610 proven. 4 refuted. 0 times theorem prover too weak. 640 trivial. 20 not checked. [2021-12-06 19:57:43,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:43,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_42 Int) (v_ArrVal_3656 (Array Int Int))) (or (not (= (select |c_#valid| v_append_~node~0.base_42) 0)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_42 v_ArrVal_3656) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 0)))) is different from false [2021-12-06 19:57:43,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912189768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:43,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:57:43,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 31 [2021-12-06 19:57:43,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485344347] [2021-12-06 19:57:43,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:43,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 19:57:43,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 19:57:43,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=707, Unknown=15, NotChecked=168, Total=992 [2021-12-06 19:57:43,087 INFO L87 Difference]: Start difference. First operand 442 states and 604 transitions. Second operand has 31 states, 29 states have (on average 4.379310344827586) internal successors, (127), 26 states have internal predecessors, (127), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2021-12-06 19:57:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:46,512 INFO L93 Difference]: Finished difference Result 805 states and 910 transitions. [2021-12-06 19:57:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 19:57:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.379310344827586) internal successors, (127), 26 states have internal predecessors, (127), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) Word has length 230 [2021-12-06 19:57:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:46,516 INFO L225 Difference]: With dead ends: 805 [2021-12-06 19:57:46,516 INFO L226 Difference]: Without dead ends: 805 [2021-12-06 19:57:46,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 264 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=272, Invalid=2037, Unknown=55, NotChecked=288, Total=2652 [2021-12-06 19:57:46,517 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 1187 mSDsluCounter, 2733 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 2914 SdHoareTripleChecker+Invalid, 4154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1389 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:46,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 2914 Invalid, 4154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2689 Invalid, 0 Unknown, 1389 Unchecked, 0.8s Time] [2021-12-06 19:57:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-12-06 19:57:46,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 452. [2021-12-06 19:57:46,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 315 states have (on average 1.7777777777777777) internal successors, (560), 426 states have internal predecessors, (560), 23 states have call successors, (23), 4 states have call predecessors, (23), 5 states have return successors, (44), 23 states have call predecessors, (44), 23 states have call successors, (44) [2021-12-06 19:57:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 627 transitions. [2021-12-06 19:57:46,529 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 627 transitions. Word has length 230 [2021-12-06 19:57:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:46,530 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 627 transitions. [2021-12-06 19:57:46,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.379310344827586) internal successors, (127), 26 states have internal predecessors, (127), 6 states have call successors, (28), 5 states have call predecessors, (28), 6 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2021-12-06 19:57:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 627 transitions. [2021-12-06 19:57:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-06 19:57:46,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:46,533 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:46,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:57:46,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:46,734 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash -867616398, now seen corresponding path program 1 times [2021-12-06 19:57:46,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:46,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645329385] [2021-12-06 19:57:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:46,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:57:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:46,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:57:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:57:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 19:57:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-06 19:57:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 19:57:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-06 19:57:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 19:57:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 19:57:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 19:57:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-06 19:57:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-06 19:57:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-06 19:57:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-06 19:57:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-06 19:57:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-12-06 19:57:47,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:57:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645329385] [2021-12-06 19:57:47,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645329385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:47,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006957210] [2021-12-06 19:57:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:47,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:57:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:57:47,311 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:57:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:57:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:57:47,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 2023 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 19:57:47,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:57:47,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:57:47,832 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 19:57:47,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:57:47,859 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:47,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 19:57:47,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:57:47,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 19:57:47,896 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:57:47,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 19:57:47,957 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 19:57:47,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 19:57:48,049 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5035 (Array Int Int)) (append_~node~0.base Int)) (and (= 0 (select |c_old(#valid)| append_~node~0.base)) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_5035) |c_append_#in~head.base|) |c_append_#in~head.offset|) |c_append_#t~mem56.base|))) is different from true [2021-12-06 19:57:55,323 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5035 (Array Int Int)) (append_~node~0.base Int)) (and (= 0 (select |c_old(#valid)| append_~node~0.base)) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_5035) |c_append_#in~head.base|) |c_append_#in~head.offset|) 0))) is different from true [2021-12-06 19:57:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 700 proven. 4 refuted. 0 times theorem prover too weak. 472 trivial. 20 not checked. [2021-12-06 19:57:55,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:57:55,588 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_72 Int) (v_ArrVal_5038 (Array Int Int))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_72 v_ArrVal_5038) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) 0)) (not (= (select |c_#valid| v_append_~node~0.base_72) 0)))) is different from false [2021-12-06 19:57:55,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006957210] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:57:55,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:57:55,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2021-12-06 19:57:55,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938962792] [2021-12-06 19:57:55,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:57:55,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 19:57:55,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:57:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 19:57:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=969, Unknown=25, NotChecked=198, Total=1332 [2021-12-06 19:57:55,590 INFO L87 Difference]: Start difference. First operand 452 states and 627 transitions. Second operand has 36 states, 34 states have (on average 4.117647058823529) internal successors, (140), 31 states have internal predecessors, (140), 6 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (28), 5 states have call predecessors, (28), 6 states have call successors, (28) [2021-12-06 19:57:59,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:57:59,577 INFO L93 Difference]: Finished difference Result 615 states and 734 transitions. [2021-12-06 19:57:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:57:59,578 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 4.117647058823529) internal successors, (140), 31 states have internal predecessors, (140), 6 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (28), 5 states have call predecessors, (28), 6 states have call successors, (28) Word has length 232 [2021-12-06 19:57:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:57:59,580 INFO L225 Difference]: With dead ends: 615 [2021-12-06 19:57:59,580 INFO L226 Difference]: Without dead ends: 615 [2021-12-06 19:57:59,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 392 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=353, Invalid=2354, Unknown=61, NotChecked=312, Total=3080 [2021-12-06 19:57:59,582 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 295 mSDsluCounter, 3074 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 3499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1380 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:57:59,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 3279 Invalid, 3499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2048 Invalid, 0 Unknown, 1380 Unchecked, 0.7s Time] [2021-12-06 19:57:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-12-06 19:57:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 481. [2021-12-06 19:57:59,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 337 states have (on average 1.7329376854599408) internal successors, (584), 451 states have internal predecessors, (584), 28 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (75), 27 states have call predecessors, (75), 28 states have call successors, (75) [2021-12-06 19:57:59,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 687 transitions. [2021-12-06 19:57:59,595 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 687 transitions. Word has length 232 [2021-12-06 19:57:59,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:57:59,596 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 687 transitions. [2021-12-06 19:57:59,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 4.117647058823529) internal successors, (140), 31 states have internal predecessors, (140), 6 states have call successors, (28), 5 states have call predecessors, (28), 7 states have return successors, (28), 5 states have call predecessors, (28), 6 states have call successors, (28) [2021-12-06 19:57:59,596 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 687 transitions. [2021-12-06 19:57:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-06 19:57:59,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:57:59,599 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:57:59,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:57:59,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 19:57:59,801 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:57:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:57:59,802 INFO L85 PathProgramCache]: Analyzing trace with hash -109030478, now seen corresponding path program 2 times [2021-12-06 19:57:59,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:57:59,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495665923] [2021-12-06 19:57:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:57:59,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:58:00,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:58:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:58:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 19:58:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 19:58:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 19:58:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 19:58:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 19:58:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 19:58:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-06 19:58:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-06 19:58:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-06 19:58:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-06 19:58:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-06 19:58:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-06 19:58:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 278 proven. 11 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-12-06 19:58:00,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:58:00,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495665923] [2021-12-06 19:58:00,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495665923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:00,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581982932] [2021-12-06 19:58:00,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:58:00,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:00,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:58:00,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:58:00,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:58:00,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:58:00,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:58:00,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 19:58:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:01,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:58:01,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:58:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:01,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:58:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:01,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:58:01,069 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:01,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 19:58:01,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 19:58:01,083 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:01,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 19:58:01,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 19:58:01,124 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:01,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 19:58:01,133 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:01,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 19:58:01,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 19:58:01,234 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 19:58:01,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 19:58:01,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-06 19:58:01,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 19:58:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 291 proven. 11 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-06 19:58:01,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:01,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:58:01,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:01,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 66 [2021-12-06 19:58:01,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:58:01,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:01,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 53 [2021-12-06 19:58:01,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 71 [2021-12-06 19:58:01,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 100 [2021-12-06 19:58:01,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 85 [2021-12-06 19:58:01,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 79 [2021-12-06 19:58:01,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:01,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 85 [2021-12-06 19:58:01,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:01,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 46 [2021-12-06 19:58:01,725 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:58:01,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-12-06 19:58:01,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:01,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2021-12-06 19:58:01,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 19:58:01,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:58:01,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:01,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-12-06 19:58:01,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:58:01,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-12-06 19:58:01,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:58:01,756 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-12-06 19:58:01,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 1 [2021-12-06 19:58:01,939 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:58:01,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-06 19:58:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 289 proven. 13 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-06 19:58:02,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581982932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:58:02,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:58:02,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 36 [2021-12-06 19:58:02,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598699778] [2021-12-06 19:58:02,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:02,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 19:58:02,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:58:02,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 19:58:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1209, Unknown=4, NotChecked=0, Total=1332 [2021-12-06 19:58:02,051 INFO L87 Difference]: Start difference. First operand 481 states and 687 transitions. Second operand has 37 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 34 states have internal predecessors, (142), 5 states have call successors, (42), 4 states have call predecessors, (42), 6 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2021-12-06 19:58:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:04,314 INFO L93 Difference]: Finished difference Result 1057 states and 1245 transitions. [2021-12-06 19:58:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 19:58:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 34 states have internal predecessors, (142), 5 states have call successors, (42), 4 states have call predecessors, (42), 6 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) Word has length 236 [2021-12-06 19:58:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:04,321 INFO L225 Difference]: With dead ends: 1057 [2021-12-06 19:58:04,321 INFO L226 Difference]: Without dead ends: 1057 [2021-12-06 19:58:04,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 477 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=433, Invalid=3103, Unknown=4, NotChecked=0, Total=3540 [2021-12-06 19:58:04,323 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 5698 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 3244 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5698 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 5204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 3244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1327 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:04,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5698 Valid, 1767 Invalid, 5204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 3244 Invalid, 0 Unknown, 1327 Unchecked, 1.5s Time] [2021-12-06 19:58:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-12-06 19:58:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 490. [2021-12-06 19:58:04,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 347 states have (on average 1.69164265129683) internal successors, (587), 460 states have internal predecessors, (587), 28 states have call successors, (28), 4 states have call predecessors, (28), 7 states have return successors, (75), 27 states have call predecessors, (75), 28 states have call successors, (75) [2021-12-06 19:58:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 690 transitions. [2021-12-06 19:58:04,350 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 690 transitions. Word has length 236 [2021-12-06 19:58:04,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:04,350 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 690 transitions. [2021-12-06 19:58:04,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.9444444444444446) internal successors, (142), 34 states have internal predecessors, (142), 5 states have call successors, (42), 4 states have call predecessors, (42), 6 states have return successors, (30), 8 states have call predecessors, (30), 5 states have call successors, (30) [2021-12-06 19:58:04,351 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 690 transitions. [2021-12-06 19:58:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-06 19:58:04,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:04,354 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:04,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 19:58:04,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:58:04,555 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2024681295, now seen corresponding path program 1 times [2021-12-06 19:58:04,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:58:04,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140222149] [2021-12-06 19:58:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:04,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:58:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:58:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:58:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 19:58:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 19:58:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 19:58:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 19:58:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 19:58:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 19:58:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-06 19:58:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-06 19:58:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-06 19:58:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-06 19:58:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2021-12-06 19:58:04,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:04,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-06 19:58:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 246 proven. 5 refuted. 0 times theorem prover too weak. 831 trivial. 0 not checked. [2021-12-06 19:58:05,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:58:05,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140222149] [2021-12-06 19:58:05,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140222149] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:05,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636380888] [2021-12-06 19:58:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:05,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:05,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:58:05,079 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:58:05,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:58:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:05,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 19:58:05,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:05,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:58:05,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:05,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:58:05,778 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:05,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 19:58:05,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 19:58:05,811 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:05,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 19:58:05,855 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-12-06 19:58:05,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-12-06 19:58:05,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 19:58:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 259 proven. 5 refuted. 0 times theorem prover too weak. 818 trivial. 0 not checked. [2021-12-06 19:58:05,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:05,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:58:05,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:05,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2021-12-06 19:58:05,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-12-06 19:58:05,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 19:58:07,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636380888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:07,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:58:07,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-12-06 19:58:07,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201176741] [2021-12-06 19:58:07,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:07,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 19:58:07,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:58:07,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 19:58:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-12-06 19:58:07,990 INFO L87 Difference]: Start difference. First operand 490 states and 690 transitions. Second operand has 27 states, 26 states have (on average 4.5) internal successors, (117), 25 states have internal predecessors, (117), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-06 19:58:09,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:09,153 INFO L93 Difference]: Finished difference Result 823 states and 997 transitions. [2021-12-06 19:58:09,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 19:58:09,154 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.5) internal successors, (117), 25 states have internal predecessors, (117), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 236 [2021-12-06 19:58:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:09,158 INFO L225 Difference]: With dead ends: 823 [2021-12-06 19:58:09,158 INFO L226 Difference]: Without dead ends: 823 [2021-12-06 19:58:09,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 19:58:09,159 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 2556 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2556 SdHoareTripleChecker+Valid, 2536 SdHoareTripleChecker+Invalid, 3219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:09,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2556 Valid, 2536 Invalid, 3219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 2575 Invalid, 0 Unknown, 315 Unchecked, 1.0s Time] [2021-12-06 19:58:09,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-12-06 19:58:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 481. [2021-12-06 19:58:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 340 states have (on average 1.6970588235294117) internal successors, (577), 453 states have internal predecessors, (577), 27 states have call successors, (27), 4 states have call predecessors, (27), 7 states have return successors, (72), 25 states have call predecessors, (72), 27 states have call successors, (72) [2021-12-06 19:58:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 676 transitions. [2021-12-06 19:58:09,172 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 676 transitions. Word has length 236 [2021-12-06 19:58:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:09,172 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 676 transitions. [2021-12-06 19:58:09,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.5) internal successors, (117), 25 states have internal predecessors, (117), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-06 19:58:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 676 transitions. [2021-12-06 19:58:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-06 19:58:09,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:09,175 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:09,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 19:58:09,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:58:09,375 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:09,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1131645505, now seen corresponding path program 1 times [2021-12-06 19:58:09,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:58:09,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586120535] [2021-12-06 19:58:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:09,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:58:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:58:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:58:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 19:58:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 19:58:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 19:58:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 19:58:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 19:58:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 19:58:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-06 19:58:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-06 19:58:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-06 19:58:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-06 19:58:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-06 19:58:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-06 19:58:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1082 trivial. 0 not checked. [2021-12-06 19:58:09,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:58:09,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586120535] [2021-12-06 19:58:09,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586120535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:09,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:09,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:58:09,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475447070] [2021-12-06 19:58:09,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:09,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:58:09,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:58:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:58:09,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:58:09,584 INFO L87 Difference]: Start difference. First operand 481 states and 676 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 19:58:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:09,858 INFO L93 Difference]: Finished difference Result 682 states and 801 transitions. [2021-12-06 19:58:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:58:09,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 239 [2021-12-06 19:58:09,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:09,861 INFO L225 Difference]: With dead ends: 682 [2021-12-06 19:58:09,861 INFO L226 Difference]: Without dead ends: 682 [2021-12-06 19:58:09,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:58:09,862 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 631 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:09,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 672 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:58:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-12-06 19:58:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 476. [2021-12-06 19:58:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 340 states have (on average 1.6647058823529413) internal successors, (566), 448 states have internal predecessors, (566), 27 states have call successors, (27), 4 states have call predecessors, (27), 7 states have return successors, (72), 25 states have call predecessors, (72), 27 states have call successors, (72) [2021-12-06 19:58:09,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 665 transitions. [2021-12-06 19:58:09,878 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 665 transitions. Word has length 239 [2021-12-06 19:58:09,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:09,879 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 665 transitions. [2021-12-06 19:58:09,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-06 19:58:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 665 transitions. [2021-12-06 19:58:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-06 19:58:09,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:09,882 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:09,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 19:58:09,882 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:09,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:09,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1131645504, now seen corresponding path program 1 times [2021-12-06 19:58:09,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:58:09,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139356737] [2021-12-06 19:58:09,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:09,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:58:10,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:58:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:58:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 19:58:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 19:58:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 19:58:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 19:58:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 19:58:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 19:58:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-06 19:58:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-06 19:58:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-06 19:58:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-06 19:58:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-06 19:58:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2021-12-06 19:58:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 252 proven. 162 refuted. 0 times theorem prover too weak. 668 trivial. 0 not checked. [2021-12-06 19:58:10,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:58:10,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139356737] [2021-12-06 19:58:10,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139356737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:10,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235074398] [2021-12-06 19:58:10,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:10,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:10,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:58:10,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:58:10,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:58:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:10,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-06 19:58:10,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:11,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:58:11,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:11,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:58:11,182 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:11,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 19:58:11,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 19:58:11,222 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:11,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 19:58:11,273 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:58:11,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:58:11,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:58:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 291 proven. 11 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-06 19:58:11,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:11,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 19:58:11,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:58:11,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:11,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-12-06 19:58:11,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-12-06 19:58:11,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 19:58:11,576 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:58:11,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2021-12-06 19:58:11,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:11,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2021-12-06 19:58:11,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 19:58:11,766 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:58:11,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-12-06 19:58:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 289 proven. 13 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-12-06 19:58:11,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235074398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:58:11,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:58:11,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 15] total 46 [2021-12-06 19:58:11,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231692929] [2021-12-06 19:58:11,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:11,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 19:58:11,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:58:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 19:58:11,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1893, Unknown=4, NotChecked=0, Total=2070 [2021-12-06 19:58:11,872 INFO L87 Difference]: Start difference. First operand 476 states and 665 transitions. Second operand has 46 states, 44 states have (on average 3.7045454545454546) internal successors, (163), 41 states have internal predecessors, (163), 7 states have call successors, (42), 4 states have call predecessors, (42), 7 states have return successors, (35), 9 states have call predecessors, (35), 7 states have call successors, (35) [2021-12-06 19:58:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:15,155 INFO L93 Difference]: Finished difference Result 862 states and 947 transitions. [2021-12-06 19:58:15,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 19:58:15,156 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 3.7045454545454546) internal successors, (163), 41 states have internal predecessors, (163), 7 states have call successors, (42), 4 states have call predecessors, (42), 7 states have return successors, (35), 9 states have call predecessors, (35), 7 states have call successors, (35) Word has length 239 [2021-12-06 19:58:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:15,159 INFO L225 Difference]: With dead ends: 862 [2021-12-06 19:58:15,159 INFO L226 Difference]: Without dead ends: 824 [2021-12-06 19:58:15,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 482 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=739, Invalid=5577, Unknown=4, NotChecked=0, Total=6320 [2021-12-06 19:58:15,161 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 1690 mSDsluCounter, 4882 mSDsCounter, 0 mSdLazyCounter, 6030 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 5112 SdHoareTripleChecker+Invalid, 6996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 6030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 718 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:15,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1690 Valid, 5112 Invalid, 6996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 6030 Invalid, 0 Unknown, 718 Unchecked, 2.0s Time] [2021-12-06 19:58:15,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-12-06 19:58:15,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 453. [2021-12-06 19:58:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 327 states have (on average 1.694189602446483) internal successors, (554), 431 states have internal predecessors, (554), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-06 19:58:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 594 transitions. [2021-12-06 19:58:15,169 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 594 transitions. Word has length 239 [2021-12-06 19:58:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:15,169 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 594 transitions. [2021-12-06 19:58:15,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 3.7045454545454546) internal successors, (163), 41 states have internal predecessors, (163), 7 states have call successors, (42), 4 states have call predecessors, (42), 7 states have return successors, (35), 9 states have call predecessors, (35), 7 states have call successors, (35) [2021-12-06 19:58:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 594 transitions. [2021-12-06 19:58:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-06 19:58:15,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:15,171 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:15,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:58:15,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:15,372 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1136098712, now seen corresponding path program 2 times [2021-12-06 19:58:15,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:58:15,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842646228] [2021-12-06 19:58:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:15,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:58:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:17,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 19:58:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:17,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-06 19:58:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:17,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 19:58:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:17,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 19:58:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:17,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 19:58:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:18,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 19:58:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:18,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 19:58:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:18,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-06 19:58:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:19,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-06 19:58:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:19,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-06 19:58:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:19,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-06 19:58:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-06 19:58:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:19,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-12-06 19:58:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:20,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2021-12-06 19:58:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 175 proven. 759 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-12-06 19:58:20,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:58:20,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842646228] [2021-12-06 19:58:20,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842646228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:20,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969526783] [2021-12-06 19:58:20,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:58:20,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:20,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:58:20,418 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:58:20,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:58:21,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:58:21,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:58:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 507 conjunts are in the unsatisfiable core [2021-12-06 19:58:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:21,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:21,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:58:21,255 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 19:58:21,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:58:21,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:21,299 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:21,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:58:21,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:58:21,314 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:21,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 19:58:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:21,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 19:58:21,374 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:21,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 19:58:21,382 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:21,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:58:21,448 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 19:58:21,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 19:58:21,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:22,031 INFO L354 Elim1Store]: treesize reduction 354, result has 41.7 percent of original size [2021-12-06 19:58:22,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 533 treesize of output 527 [2021-12-06 19:58:22,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 810 treesize of output 714 [2021-12-06 19:58:22,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 518 treesize of output 470 [2021-12-06 19:58:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:22,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 19:58:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:22,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2021-12-06 19:58:22,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:58:22,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:58:22,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 13 [2021-12-06 19:58:22,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:22,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:22,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 137 [2021-12-06 19:58:22,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:22,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2021-12-06 19:58:22,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:22,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:22,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-12-06 19:58:22,728 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 19:58:22,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 19:58:23,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:23,324 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 19:58:23,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 19:58:23,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:23,356 INFO L354 Elim1Store]: treesize reduction 202, result has 35.9 percent of original size [2021-12-06 19:58:23,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 184 [2021-12-06 19:58:23,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:23,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 82 [2021-12-06 19:58:23,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:23,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 19:58:23,382 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-06 19:58:23,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-12-06 19:58:23,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:23,977 INFO L354 Elim1Store]: treesize reduction 354, result has 41.7 percent of original size [2021-12-06 19:58:23,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 533 treesize of output 527 [2021-12-06 19:58:23,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 810 treesize of output 714 [2021-12-06 19:58:23,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 518 treesize of output 470 [2021-12-06 19:58:23,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:24,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 19:58:24,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:58:24,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:58:24,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2021-12-06 19:58:24,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2021-12-06 19:58:24,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-12-06 19:58:24,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:24,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 128 [2021-12-06 19:58:24,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:58:24,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:24,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 142 [2021-12-06 19:58:24,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 78 [2021-12-06 19:58:24,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:58:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:24,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-12-06 19:58:24,630 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 19:58:24,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 19:58:25,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:25,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2021-12-06 19:58:25,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:25,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:25,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:25,203 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:25,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2021-12-06 19:58:25,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:25,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-12-06 19:58:25,213 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:58:25,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:58:25,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:25,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:25,959 INFO L354 Elim1Store]: treesize reduction 130, result has 43.7 percent of original size [2021-12-06 19:58:25,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 155 treesize of output 205 [2021-12-06 19:58:25,974 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:58:25,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 19:58:26,175 INFO L354 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2021-12-06 19:58:26,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 41 [2021-12-06 19:58:26,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-06 19:58:26,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:26,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-12-06 19:58:26,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-12-06 19:58:26,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-12-06 19:58:27,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-12-06 19:58:27,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:27,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-12-06 19:58:27,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-12-06 19:58:27,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:27,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-12-06 19:58:27,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-12-06 19:58:27,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:27,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-12-06 19:58:28,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-12-06 19:58:28,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:58:28,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-12-06 19:58:28,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:58:28,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-12-06 19:58:28,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:58:29,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:29,678 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-06 19:58:29,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 265 treesize of output 277 [2021-12-06 19:58:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:30,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-12-06 19:58:30,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:30,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2021-12-06 19:58:30,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:30,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-12-06 19:58:30,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:30,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-12-06 19:58:30,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 80 [2021-12-06 19:58:30,454 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-06 19:58:30,454 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:58:30,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-12-06 19:58:30,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41025825] [2021-12-06 19:58:30,454 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:30,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 19:58:30,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:58:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 19:58:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=6255, Unknown=124, NotChecked=0, Total=6972 [2021-12-06 19:58:30,457 INFO L87 Difference]: Start difference. First operand 453 states and 594 transitions. Second operand has 46 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 4 states have call successors, (14), 1 states have call predecessors, (14), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 19:58:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 19:58:30,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 155 SyntacticMatches, 20 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4148 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=593, Invalid=6255, Unknown=124, NotChecked=0, Total=6972 [2021-12-06 19:58:30,459 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:30,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:58:30,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 19:58:30,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:58:30,662 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@86682b9 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 19:58:30,670 INFO L158 Benchmark]: Toolchain (without parser) took 79297.14ms. Allocated memory was 121.6MB in the beginning and 446.7MB in the end (delta: 325.1MB). Free memory was 88.2MB in the beginning and 130.3MB in the end (delta: -42.1MB). Peak memory consumption was 283.4MB. Max. memory is 16.1GB. [2021-12-06 19:58:30,671 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 79.7MB. Free memory was 49.7MB in the beginning and 49.6MB in the end (delta: 24.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 19:58:30,671 INFO L158 Benchmark]: CACSL2BoogieTranslator took 318.02ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 89.4MB in the end (delta: -1.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 19:58:30,672 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.55ms. Allocated memory is still 121.6MB. Free memory was 89.4MB in the beginning and 86.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 19:58:30,672 INFO L158 Benchmark]: Boogie Preprocessor took 33.91ms. Allocated memory is still 121.6MB. Free memory was 86.8MB in the beginning and 84.0MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 19:58:30,672 INFO L158 Benchmark]: RCFGBuilder took 582.40ms. Allocated memory is still 121.6MB. Free memory was 84.0MB in the beginning and 48.3MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2021-12-06 19:58:30,672 INFO L158 Benchmark]: TraceAbstraction took 78302.52ms. Allocated memory was 121.6MB in the beginning and 446.7MB in the end (delta: 325.1MB). Free memory was 48.3MB in the beginning and 130.3MB in the end (delta: -82.0MB). Peak memory consumption was 245.9MB. Max. memory is 16.1GB. [2021-12-06 19:58:30,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 79.7MB. Free memory was 49.7MB in the beginning and 49.6MB in the end (delta: 24.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 318.02ms. Allocated memory is still 121.6MB. Free memory was 88.2MB in the beginning and 89.4MB in the end (delta: -1.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.55ms. Allocated memory is still 121.6MB. Free memory was 89.4MB in the beginning and 86.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.91ms. Allocated memory is still 121.6MB. Free memory was 86.8MB in the beginning and 84.0MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 582.40ms. Allocated memory is still 121.6MB. Free memory was 84.0MB in the beginning and 48.3MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * TraceAbstraction took 78302.52ms. Allocated memory was 121.6MB in the beginning and 446.7MB in the end (delta: 325.1MB). Free memory was 48.3MB in the beginning and 130.3MB in the end (delta: -82.0MB). Peak memory consumption was 245.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@86682b9 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@86682b9: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-06 19:58:30,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa --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 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:58:32,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:58:32,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:58:32,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:58:32,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:58:32,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:58:32,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:58:32,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:58:32,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:58:32,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:58:32,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:58:32,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:58:32,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:58:32,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:58:32,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:58:32,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:58:32,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:58:32,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:58:32,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:58:32,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:58:32,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:58:32,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:58:32,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:58:32,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:58:32,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:58:32,188 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:58:32,188 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:58:32,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:58:32,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:58:32,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:58:32,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:58:32,191 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:58:32,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:58:32,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:58:32,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:58:32,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:58:32,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:58:32,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:58:32,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:58:32,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:58:32,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:58:32,200 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 19:58:32,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:58:32,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:58:32,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:58:32,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:58:32,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:58:32,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:58:32,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:58:32,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:58:32,222 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:58:32,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:58:32,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:58:32,223 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 19:58:32,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:58:32,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:58:32,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:58:32,224 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 19:58:32,224 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 19:58:32,224 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 19:58:32,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:58:32,225 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 19:58:32,225 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 19:58:32,225 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 19:58:32,225 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:58:32,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:58:32,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:58:32,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:58:32,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:58:32,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:58:32,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:58:32,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:58:32,227 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 19:58:32,227 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 19:58:32,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:58:32,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 19:58:32,228 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753b20bc59ec3e8b11fc0f1b54dadf2ece41f6cecc7eda05bde7d4413de53136 [2021-12-06 19:58:32,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:58:32,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:58:32,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:58:32,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:58:32,474 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:58:32,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2021-12-06 19:58:32,523 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data/0894d1801/46020cd27bd94a9baa7ce4e02be6417a/FLAG6d584a7a7 [2021-12-06 19:58:33,019 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:58:33,019 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/sv-benchmarks/c/memsafety-ext2/split_list_test05-1.i [2021-12-06 19:58:33,032 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data/0894d1801/46020cd27bd94a9baa7ce4e02be6417a/FLAG6d584a7a7 [2021-12-06 19:58:33,552 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/data/0894d1801/46020cd27bd94a9baa7ce4e02be6417a [2021-12-06 19:58:33,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:58:33,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:58:33,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:58:33,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:58:33,559 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:58:33,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67c5dc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33, skipping insertion in model container [2021-12-06 19:58:33,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:58:33,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:58:33,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:58:33,801 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:58:33,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:58:33,865 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:58:33,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33 WrapperNode [2021-12-06 19:58:33,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:58:33,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:58:33,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:58:33,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:58:33,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,911 INFO L137 Inliner]: procedures = 126, calls = 94, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 294 [2021-12-06 19:58:33,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:58:33,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:58:33,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:58:33,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:58:33,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:58:33,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:58:33,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:58:33,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:58:33,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (1/1) ... [2021-12-06 19:58:33,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:58:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:58:33,976 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:58:33,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:58:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-12-06 19:58:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:58:34,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:58:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:58:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:58:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-12-06 19:58:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:58:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 19:58:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:58:34,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:58:34,012 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-12-06 19:58:34,012 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-12-06 19:58:34,109 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:58:34,111 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:58:34,901 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:58:34,910 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:58:34,911 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-06 19:58:34,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:58:34 BoogieIcfgContainer [2021-12-06 19:58:34,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:58:34,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:58:34,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:58:34,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:58:34,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:58:33" (1/3) ... [2021-12-06 19:58:34,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322ae507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:58:34, skipping insertion in model container [2021-12-06 19:58:34,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:58:33" (2/3) ... [2021-12-06 19:58:34,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322ae507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:58:34, skipping insertion in model container [2021-12-06 19:58:34,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:58:34" (3/3) ... [2021-12-06 19:58:34,920 INFO L111 eAbstractionObserver]: Analyzing ICFG split_list_test05-1.i [2021-12-06 19:58:34,926 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:58:34,926 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 147 error locations. [2021-12-06 19:58:34,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:58:34,967 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 19:58:34,967 INFO L340 AbstractCegarLoop]: Starting to check reachability of 147 error locations. [2021-12-06 19:58:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 320 states, 157 states have (on average 2.159235668789809) internal successors, (339), 306 states have internal predecessors, (339), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:58:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-06 19:58:34,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:34,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-06 19:58:34,988 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:34,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-12-06 19:58:35,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:35,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890493778] [2021-12-06 19:58:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:35,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:35,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:35,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:35,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 19:58:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:35,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:58:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:35,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:35,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:58:35,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890493778] [2021-12-06 19:58:35,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890493778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:35,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:35,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:58:35,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848387289] [2021-12-06 19:58:35,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:35,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:58:35,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:35,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:58:35,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:35,152 INFO L87 Difference]: Start difference. First operand has 320 states, 157 states have (on average 2.159235668789809) internal successors, (339), 306 states have internal predecessors, (339), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:58:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:35,734 INFO L93 Difference]: Finished difference Result 545 states and 598 transitions. [2021-12-06 19:58:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:58:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-06 19:58:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:35,749 INFO L225 Difference]: With dead ends: 545 [2021-12-06 19:58:35,749 INFO L226 Difference]: Without dead ends: 543 [2021-12-06 19:58:35,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:35,753 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 246 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:35,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 443 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:58:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-12-06 19:58:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 404. [2021-12-06 19:58:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 244 states have (on average 2.1024590163934427) internal successors, (513), 390 states have internal predecessors, (513), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:58:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 541 transitions. [2021-12-06 19:58:35,803 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 541 transitions. Word has length 3 [2021-12-06 19:58:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:35,804 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 541 transitions. [2021-12-06 19:58:35,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:58:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 541 transitions. [2021-12-06 19:58:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-06 19:58:35,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:35,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-06 19:58:35,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:58:36,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:36,005 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:36,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:36,006 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-12-06 19:58:36,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:36,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037907903] [2021-12-06 19:58:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:36,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:36,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:36,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:36,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 19:58:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:58:36,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:36,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:36,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:58:36,058 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:36,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037907903] [2021-12-06 19:58:36,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037907903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:36,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:36,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:58:36,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683204308] [2021-12-06 19:58:36,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:36,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:58:36,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:58:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:36,061 INFO L87 Difference]: Start difference. First operand 404 states and 541 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:58:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:36,541 INFO L93 Difference]: Finished difference Result 405 states and 544 transitions. [2021-12-06 19:58:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:58:36,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-06 19:58:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:36,543 INFO L225 Difference]: With dead ends: 405 [2021-12-06 19:58:36,544 INFO L226 Difference]: Without dead ends: 405 [2021-12-06 19:58:36,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:36,545 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 6 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:36,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 561 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 19:58:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-12-06 19:58:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 402. [2021-12-06 19:58:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 244 states have (on average 2.0942622950819674) internal successors, (511), 388 states have internal predecessors, (511), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:58:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 539 transitions. [2021-12-06 19:58:36,561 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 539 transitions. Word has length 3 [2021-12-06 19:58:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:36,561 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 539 transitions. [2021-12-06 19:58:36,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:58:36,561 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 539 transitions. [2021-12-06 19:58:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 19:58:36,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:36,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:36,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 19:58:36,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:36,764 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting appendErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:36,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1117387183, now seen corresponding path program 1 times [2021-12-06 19:58:36,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:36,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452562525] [2021-12-06 19:58:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:36,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:36,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:36,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:36,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 19:58:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:36,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:58:36,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:36,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:36,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:58:36,863 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:36,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452562525] [2021-12-06 19:58:36,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452562525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:36,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:36,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:58:36,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950965081] [2021-12-06 19:58:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:36,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:58:36,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:58:36,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:36,866 INFO L87 Difference]: Start difference. First operand 402 states and 539 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-06 19:58:37,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:37,168 INFO L93 Difference]: Finished difference Result 397 states and 534 transitions. [2021-12-06 19:58:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:58:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-12-06 19:58:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:37,170 INFO L225 Difference]: With dead ends: 397 [2021-12-06 19:58:37,171 INFO L226 Difference]: Without dead ends: 397 [2021-12-06 19:58:37,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:37,172 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 43 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:37,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 491 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:58:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-06 19:58:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2021-12-06 19:58:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 244 states have (on average 2.0737704918032787) internal successors, (506), 383 states have internal predecessors, (506), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:58:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 534 transitions. [2021-12-06 19:58:37,188 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 534 transitions. Word has length 10 [2021-12-06 19:58:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:37,188 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 534 transitions. [2021-12-06 19:58:37,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-06 19:58:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 534 transitions. [2021-12-06 19:58:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 19:58:37,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:37,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:37,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-06 19:58:37,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:37,391 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting appendErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:37,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1117387184, now seen corresponding path program 1 times [2021-12-06 19:58:37,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:37,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210669597] [2021-12-06 19:58:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:37,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:37,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:37,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:37,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 19:58:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:37,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:58:37,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:37,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:37,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:58:37,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:37,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210669597] [2021-12-06 19:58:37,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210669597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:37,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:37,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:58:37,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29149252] [2021-12-06 19:58:37,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:37,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:58:37,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:58:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:37,507 INFO L87 Difference]: Start difference. First operand 397 states and 534 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-06 19:58:37,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:37,964 INFO L93 Difference]: Finished difference Result 392 states and 529 transitions. [2021-12-06 19:58:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:58:37,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2021-12-06 19:58:37,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:37,967 INFO L225 Difference]: With dead ends: 392 [2021-12-06 19:58:37,967 INFO L226 Difference]: Without dead ends: 392 [2021-12-06 19:58:37,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:37,968 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 38 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:37,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 504 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:58:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-06 19:58:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2021-12-06 19:58:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 244 states have (on average 2.05327868852459) internal successors, (501), 378 states have internal predecessors, (501), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-06 19:58:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 529 transitions. [2021-12-06 19:58:37,977 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 529 transitions. Word has length 10 [2021-12-06 19:58:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:37,977 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 529 transitions. [2021-12-06 19:58:37,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2021-12-06 19:58:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 529 transitions. [2021-12-06 19:58:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:58:37,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:37,978 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:37,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 19:58:38,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:38,180 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:38,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash 279264727, now seen corresponding path program 1 times [2021-12-06 19:58:38,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:38,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413202301] [2021-12-06 19:58:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:38,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:38,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:38,185 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:38,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 19:58:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:38,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:58:38,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:38,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:38,329 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 19:58:38,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-12-06 19:58:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:38,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:58:38,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:38,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413202301] [2021-12-06 19:58:38,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413202301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:38,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:38,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:58:38,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870574614] [2021-12-06 19:58:38,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:58:38,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:58:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:58:38,362 INFO L87 Difference]: Start difference. First operand 392 states and 529 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-06 19:58:38,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:38,943 INFO L93 Difference]: Finished difference Result 534 states and 588 transitions. [2021-12-06 19:58:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:58:38,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2021-12-06 19:58:38,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:38,945 INFO L225 Difference]: With dead ends: 534 [2021-12-06 19:58:38,946 INFO L226 Difference]: Without dead ends: 534 [2021-12-06 19:58:38,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:58:38,947 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 239 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:38,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 804 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 397 Invalid, 0 Unknown, 252 Unchecked, 0.6s Time] [2021-12-06 19:58:38,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-06 19:58:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 398. [2021-12-06 19:58:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 249 states have (on average 2.040160642570281) internal successors, (508), 383 states have internal predecessors, (508), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:58:38,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 538 transitions. [2021-12-06 19:58:38,960 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 538 transitions. Word has length 11 [2021-12-06 19:58:38,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:38,960 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 538 transitions. [2021-12-06 19:58:38,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-06 19:58:38,960 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 538 transitions. [2021-12-06 19:58:38,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 19:58:38,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:38,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:38,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 19:58:39,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:39,162 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:39,163 INFO L85 PathProgramCache]: Analyzing trace with hash 279264728, now seen corresponding path program 1 times [2021-12-06 19:58:39,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:39,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654669026] [2021-12-06 19:58:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:39,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:39,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:39,165 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:39,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 19:58:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:39,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 19:58:39,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:39,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:39,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:39,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:39,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 19:58:39,432 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:58:39,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 19:58:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:39,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:58:39,453 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:39,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654669026] [2021-12-06 19:58:39,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654669026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:39,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:39,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:58:39,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090762287] [2021-12-06 19:58:39,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:39,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:58:39,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:39,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:58:39,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:58:39,455 INFO L87 Difference]: Start difference. First operand 398 states and 538 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-06 19:58:40,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:40,748 INFO L93 Difference]: Finished difference Result 524 states and 577 transitions. [2021-12-06 19:58:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:58:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2021-12-06 19:58:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:40,751 INFO L225 Difference]: With dead ends: 524 [2021-12-06 19:58:40,751 INFO L226 Difference]: Without dead ends: 524 [2021-12-06 19:58:40,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:58:40,752 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 312 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:40,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 443 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 19:58:40,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-12-06 19:58:40,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 389. [2021-12-06 19:58:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 249 states have (on average 1.9959839357429718) internal successors, (497), 374 states have internal predecessors, (497), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:58:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 527 transitions. [2021-12-06 19:58:40,765 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 527 transitions. Word has length 11 [2021-12-06 19:58:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:40,766 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 527 transitions. [2021-12-06 19:58:40,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-06 19:58:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 527 transitions. [2021-12-06 19:58:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 19:58:40,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:40,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:40,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 19:58:40,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:40,968 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:40,970 INFO L85 PathProgramCache]: Analyzing trace with hash 224251827, now seen corresponding path program 1 times [2021-12-06 19:58:40,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:40,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317196884] [2021-12-06 19:58:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:40,972 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:40,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:40,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:40,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 19:58:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:41,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:58:41,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:41,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:58:41,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:41,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317196884] [2021-12-06 19:58:41,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317196884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:41,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:41,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:58:41,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252436486] [2021-12-06 19:58:41,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:41,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:58:41,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:41,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:58:41,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:41,088 INFO L87 Difference]: Start difference. First operand 389 states and 527 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-06 19:58:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:41,364 INFO L93 Difference]: Finished difference Result 383 states and 521 transitions. [2021-12-06 19:58:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:58:41,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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 14 [2021-12-06 19:58:41,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:41,366 INFO L225 Difference]: With dead ends: 383 [2021-12-06 19:58:41,366 INFO L226 Difference]: Without dead ends: 383 [2021-12-06 19:58:41,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:58:41,367 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 20 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:41,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 484 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 19:58:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-06 19:58:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-12-06 19:58:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 249 states have (on average 1.9718875502008033) internal successors, (491), 368 states have internal predecessors, (491), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:58:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 521 transitions. [2021-12-06 19:58:41,380 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 521 transitions. Word has length 14 [2021-12-06 19:58:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:41,380 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 521 transitions. [2021-12-06 19:58:41,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-12-06 19:58:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 521 transitions. [2021-12-06 19:58:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 19:58:41,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:41,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:41,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 19:58:41,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:41,581 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash 314804234, now seen corresponding path program 1 times [2021-12-06 19:58:41,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:41,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175829624] [2021-12-06 19:58:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:41,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:41,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:41,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:41,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 19:58:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 19:58:41,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:41,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:41,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:58:41,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:58:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:41,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:58:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 19:58:41,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:58:41,823 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:58:41,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-12-06 19:58:41,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:58:41,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 19:58:41,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:58:41,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 19:58:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:41,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:58:41,930 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175829624] [2021-12-06 19:58:41,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175829624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:41,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:41,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 19:58:41,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266482476] [2021-12-06 19:58:41,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:41,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:58:41,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:58:41,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:58:41,932 INFO L87 Difference]: Start difference. First operand 383 states and 521 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-12-06 19:58:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:42,773 INFO L93 Difference]: Finished difference Result 397 states and 536 transitions. [2021-12-06 19:58:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:58:42,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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 20 [2021-12-06 19:58:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:42,775 INFO L225 Difference]: With dead ends: 397 [2021-12-06 19:58:42,775 INFO L226 Difference]: Without dead ends: 397 [2021-12-06 19:58:42,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:58:42,776 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 25 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:42,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 1841 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:58:42,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-12-06 19:58:42,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 385. [2021-12-06 19:58:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 251 states have (on average 1.9641434262948207) internal successors, (493), 370 states have internal predecessors, (493), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:58:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 523 transitions. [2021-12-06 19:58:42,789 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 523 transitions. Word has length 20 [2021-12-06 19:58:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:42,789 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 523 transitions. [2021-12-06 19:58:42,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-12-06 19:58:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 523 transitions. [2021-12-06 19:58:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 19:58:42,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:42,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:42,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 19:58:42,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:42,992 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -54530483, now seen corresponding path program 1 times [2021-12-06 19:58:42,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:42,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889541997] [2021-12-06 19:58:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:42,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:42,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:42,999 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:43,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 19:58:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:43,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 19:58:43,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:43,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:43,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:43,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:43,295 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:58:43,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-12-06 19:58:43,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 19:58:43,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 19:58:43,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:58:43,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:58:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:43,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:58:43,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:43,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889541997] [2021-12-06 19:58:43,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889541997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:58:43,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:58:43,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 19:58:43,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993831589] [2021-12-06 19:58:43,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:58:43,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:58:43,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:58:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:58:43,406 INFO L87 Difference]: Start difference. First operand 385 states and 523 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-12-06 19:58:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:44,704 INFO L93 Difference]: Finished difference Result 525 states and 578 transitions. [2021-12-06 19:58:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 19:58:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 22 [2021-12-06 19:58:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:44,707 INFO L225 Difference]: With dead ends: 525 [2021-12-06 19:58:44,707 INFO L226 Difference]: Without dead ends: 525 [2021-12-06 19:58:44,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 19:58:44,707 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 249 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:44,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 1365 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 19:58:44,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-06 19:58:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 388. [2021-12-06 19:58:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 254 states have (on average 1.952755905511811) internal successors, (496), 373 states have internal predecessors, (496), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:58:44,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 526 transitions. [2021-12-06 19:58:44,718 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 526 transitions. Word has length 22 [2021-12-06 19:58:44,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:44,718 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 526 transitions. [2021-12-06 19:58:44,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2021-12-06 19:58:44,718 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 526 transitions. [2021-12-06 19:58:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 19:58:44,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:44,719 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:44,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 19:58:44,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:44,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:44,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1893834519, now seen corresponding path program 1 times [2021-12-06 19:58:44,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:44,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776051610] [2021-12-06 19:58:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:44,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:44,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:44,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:44,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 19:58:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:45,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 19:58:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:45,131 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 19:58:45,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-12-06 19:58:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:45,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:45,228 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:58:45,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2021-12-06 19:58:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:45,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:45,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776051610] [2021-12-06 19:58:45,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776051610] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:58:45,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:58:45,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-06 19:58:45,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531999346] [2021-12-06 19:58:45,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:45,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:58:45,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:45,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:58:45,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:58:45,241 INFO L87 Difference]: Start difference. First operand 388 states and 526 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:58:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:46,055 INFO L93 Difference]: Finished difference Result 522 states and 575 transitions. [2021-12-06 19:58:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:58:46,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-06 19:58:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:46,058 INFO L225 Difference]: With dead ends: 522 [2021-12-06 19:58:46,058 INFO L226 Difference]: Without dead ends: 522 [2021-12-06 19:58:46,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:58:46,059 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 314 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:46,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 798 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-06 19:58:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-12-06 19:58:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 387. [2021-12-06 19:58:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 254 states have (on average 1.9488188976377954) internal successors, (495), 372 states have internal predecessors, (495), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-06 19:58:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 525 transitions. [2021-12-06 19:58:46,068 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 525 transitions. Word has length 27 [2021-12-06 19:58:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:46,068 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 525 transitions. [2021-12-06 19:58:46,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 19:58:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 525 transitions. [2021-12-06 19:58:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 19:58:46,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:46,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:46,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 19:58:46,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:46,270 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:46,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:46,270 INFO L85 PathProgramCache]: Analyzing trace with hash 67877176, now seen corresponding path program 1 times [2021-12-06 19:58:46,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:46,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000170878] [2021-12-06 19:58:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:46,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:46,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:46,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:46,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 19:58:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:58:46,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:46,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:46,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:46,713 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:46,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:58:46,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:58:46,787 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:46,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:58:46,927 INFO L354 Elim1Store]: treesize reduction 75, result has 15.7 percent of original size [2021-12-06 19:58:46,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 62 [2021-12-06 19:58:46,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 19:58:46,963 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 19:58:46,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2021-12-06 19:58:47,089 INFO L354 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2021-12-06 19:58:47,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 71 [2021-12-06 19:58:47,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-12-06 19:58:47,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-12-06 19:58:47,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-12-06 19:58:47,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2021-12-06 19:58:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:47,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:47,667 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_26 (_ BitVec 32)) (v_ArrVal_329 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_326 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_26 v_ArrVal_326) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_26 v_ArrVal_329) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_26))))))) is different from false [2021-12-06 19:58:47,689 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_26 (_ BitVec 32)) (v_ArrVal_329 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_326 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_26))))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_26 v_ArrVal_326) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_26 v_ArrVal_329) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))))))))))))) is different from false [2021-12-06 19:58:47,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:47,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2021-12-06 19:58:47,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 155 [2021-12-06 19:58:47,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2021-12-06 19:58:47,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-12-06 19:58:51,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:58:51,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000170878] [2021-12-06 19:58:51,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000170878] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:51,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218284350] [2021-12-06 19:58:51,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:51,932 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:58:51,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:58:51,933 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:58:51,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-12-06 19:58:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-06 19:58:52,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:52,291 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 19:58:52,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-12-06 19:58:52,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:52,742 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:52,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:58:52,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:58:52,791 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:52,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:58:52,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:58:52,906 INFO L354 Elim1Store]: treesize reduction 54, result has 34.9 percent of original size [2021-12-06 19:58:52,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 64 [2021-12-06 19:58:53,210 INFO L354 Elim1Store]: treesize reduction 65, result has 40.9 percent of original size [2021-12-06 19:58:53,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 57 treesize of output 88 [2021-12-06 19:58:53,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-12-06 19:58:54,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-12-06 19:58:54,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2021-12-06 19:58:54,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-12-06 19:58:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:54,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:54,513 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_413 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_413) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))))) is different from false [2021-12-06 19:58:54,524 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_413 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_413) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))) (_ bv1 1)))) is different from false [2021-12-06 19:58:54,553 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_413 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_413) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))))))) is different from false [2021-12-06 19:58:54,569 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_410 (_ BitVec 1)) (v_append_~node~0.base_30 (_ BitVec 32)) (v_ArrVal_413 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_30 v_ArrVal_410) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_30 v_ArrVal_413) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_30))))))) is different from false [2021-12-06 19:58:54,585 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_410 (_ BitVec 1)) (v_append_~node~0.base_30 (_ BitVec 32)) (v_ArrVal_413 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_30 v_ArrVal_410) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_30 v_ArrVal_413) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))))))))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_30))))))) is different from false [2021-12-06 19:58:54,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:58:54,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2021-12-06 19:58:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 430 treesize of output 304 [2021-12-06 19:58:54,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 254 [2021-12-06 19:58:54,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 246 [2021-12-06 19:58:56,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218284350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:58:56,946 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:58:56,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-12-06 19:58:56,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233466251] [2021-12-06 19:58:56,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:58:56,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:58:56,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:58:56,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:58:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=522, Unknown=11, NotChecked=364, Total=992 [2021-12-06 19:58:56,948 INFO L87 Difference]: Start difference. First operand 387 states and 525 transitions. Second operand has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:58:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:58:57,485 INFO L93 Difference]: Finished difference Result 415 states and 575 transitions. [2021-12-06 19:58:57,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:58:57,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-12-06 19:58:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:58:57,489 INFO L225 Difference]: With dead ends: 415 [2021-12-06 19:58:57,489 INFO L226 Difference]: Without dead ends: 415 [2021-12-06 19:58:57,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 46 SyntacticMatches, 24 SemanticMatches, 30 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=95, Invalid=522, Unknown=11, NotChecked=364, Total=992 [2021-12-06 19:58:57,490 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 21 mSDsluCounter, 2868 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 3172 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1414 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:58:57,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 3172 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 364 Invalid, 0 Unknown, 1414 Unchecked, 0.5s Time] [2021-12-06 19:58:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-12-06 19:58:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 413. [2021-12-06 19:58:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 277 states have (on average 1.891696750902527) internal successors, (524), 396 states have internal predecessors, (524), 17 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (32), 15 states have call predecessors, (32), 17 states have call successors, (32) [2021-12-06 19:58:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 573 transitions. [2021-12-06 19:58:57,501 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 573 transitions. Word has length 36 [2021-12-06 19:58:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:58:57,501 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 573 transitions. [2021-12-06 19:58:57,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:58:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 573 transitions. [2021-12-06 19:58:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 19:58:57,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:58:57,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:58:57,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-12-06 19:58:57,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 19:58:57,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:58:57,904 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:58:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:58:57,905 INFO L85 PathProgramCache]: Analyzing trace with hash 67877177, now seen corresponding path program 1 times [2021-12-06 19:58:57,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:58:57,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667207114] [2021-12-06 19:58:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:58:57,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:58:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:58:57,907 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:58:57,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 19:58:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:58:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 19:58:58,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:58:58,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:58,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:58:58,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:58,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:58:58,349 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:58,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:58:58,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:58:58,379 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:58,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:58:58,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:58:58,457 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:58,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:58:58,476 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:58:58,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:58:58,594 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 19:58:58,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-12-06 19:58:58,712 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:58:58,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-12-06 19:58:58,729 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-12-06 19:58:58,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 19:58:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 19:58:58,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 19:58:58,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 19:58:58,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 19:58:58,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 19:58:58,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 19:58:59,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-12-06 19:58:59,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 19:58:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:58:59,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:58:59,270 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_503 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_504 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_503) c_append_~head.base) .cse0) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_504) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_503 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_503) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse1 (_ bv5 32)) (bvadd .cse1 (_ bv9 32)))))) is different from false [2021-12-06 19:59:05,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:59:05,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 110 [2021-12-06 19:59:05,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:59:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 141 [2021-12-06 19:59:05,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:59:05,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 111 [2021-12-06 19:59:05,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:59:05,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 140 [2021-12-06 19:59:05,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 186 [2021-12-06 19:59:05,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 91 [2021-12-06 19:59:05,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 67 [2021-12-06 19:59:05,256 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:59:05,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-12-06 19:59:06,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:59:06,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 87 [2021-12-06 19:59:06,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:59:06,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 87 [2021-12-06 19:59:06,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:59:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 332 [2021-12-06 19:59:06,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:59:06,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 995 treesize of output 944 [2021-12-06 19:59:06,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 905 treesize of output 873 [2021-12-06 19:59:06,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 873 treesize of output 809 [2021-12-06 19:59:06,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 809 treesize of output 777 [2021-12-06 19:59:06,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 777 treesize of output 713 [2021-12-06 19:59:06,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 713 treesize of output 697 [2021-12-06 19:59:06,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 697 treesize of output 689 [2021-12-06 19:59:07,828 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:59:07,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-12-06 19:59:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-06 19:59:10,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:59:10,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667207114] [2021-12-06 19:59:10,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667207114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:59:10,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:59:10,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-12-06 19:59:10,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087560436] [2021-12-06 19:59:10,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:59:10,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 19:59:10,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:59:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 19:59:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=417, Unknown=15, NotChecked=42, Total=552 [2021-12-06 19:59:10,355 INFO L87 Difference]: Start difference. First operand 413 states and 573 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 20 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 19:59:32,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:59:34,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:59:36,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 19:59:44,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:59:44,136 INFO L93 Difference]: Finished difference Result 845 states and 1005 transitions. [2021-12-06 19:59:44,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 19:59:44,137 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 20 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2021-12-06 19:59:44,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:59:44,141 INFO L225 Difference]: With dead ends: 845 [2021-12-06 19:59:44,141 INFO L226 Difference]: Without dead ends: 845 [2021-12-06 19:59:44,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 15 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=206, Invalid=830, Unknown=24, NotChecked=62, Total=1122 [2021-12-06 19:59:44,141 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 567 mSDsluCounter, 2518 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 109 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 5328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 2344 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:59:44,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 2668 Invalid, 5328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2872 Invalid, 3 Unknown, 2344 Unchecked, 14.9s Time] [2021-12-06 19:59:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-06 19:59:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 475. [2021-12-06 19:59:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 310 states have (on average 1.8419354838709678) internal successors, (571), 433 states have internal predecessors, (571), 45 states have call successors, (45), 4 states have call predecessors, (45), 3 states have return successors, (89), 43 states have call predecessors, (89), 45 states have call successors, (89) [2021-12-06 19:59:44,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 705 transitions. [2021-12-06 19:59:44,158 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 705 transitions. Word has length 36 [2021-12-06 19:59:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:59:44,158 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 705 transitions. [2021-12-06 19:59:44,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 20 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 19:59:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 705 transitions. [2021-12-06 19:59:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 19:59:44,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:59:44,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:59:44,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 19:59:44,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 19:59:44,360 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:59:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:59:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1478521555, now seen corresponding path program 1 times [2021-12-06 19:59:44,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:59:44,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472465687] [2021-12-06 19:59:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:59:44,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:59:44,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:59:44,366 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:59:44,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 19:59:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:44,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 19:59:44,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:59:44,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:59:44,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:59:44,987 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:59:44,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:59:44,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:59:45,080 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:59:45,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:59:45,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:59:45,266 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-06 19:59:45,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 37 [2021-12-06 19:59:45,545 INFO L354 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2021-12-06 19:59:45,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 68 [2021-12-06 19:59:45,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2021-12-06 19:59:45,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2021-12-06 19:59:46,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-12-06 19:59:46,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-12-06 19:59:46,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:59:46,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:59:46,424 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_595 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_595) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))))))))) is different from false [2021-12-06 19:59:46,447 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_39 (_ BitVec 32)) (v_ArrVal_592 (_ BitVec 1)) (v_ArrVal_595 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_39)))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_39 v_ArrVal_592) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_39 v_ArrVal_595) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))))))) (_ bv1 1))))) is different from false [2021-12-06 19:59:46,470 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_39 (_ BitVec 32)) (v_ArrVal_592 (_ BitVec 1)) (v_ArrVal_595 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_39)))))))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_39 v_ArrVal_592) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_39 v_ArrVal_595) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))))))))))))))))))) is different from false [2021-12-06 19:59:46,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:59:46,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 50 [2021-12-06 19:59:46,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 472 treesize of output 346 [2021-12-06 19:59:46,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 294 [2021-12-06 19:59:46,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 286 [2021-12-06 19:59:50,847 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 19:59:50,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472465687] [2021-12-06 19:59:50,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472465687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:59:50,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1057391524] [2021-12-06 19:59:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:59:50,848 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 19:59:50,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 19:59:50,848 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 19:59:50,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-06 19:59:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:51,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 19:59:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:59:51,235 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 19:59:51,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-06 19:59:51,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 19:59:51,810 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:59:51,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 19:59:51,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 19:59:51,874 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:59:51,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 19:59:52,062 INFO L354 Elim1Store]: treesize reduction 130, result has 19.3 percent of original size [2021-12-06 19:59:52,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 71 treesize of output 91 [2021-12-06 19:59:52,141 INFO L354 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2021-12-06 19:59:52,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 50 [2021-12-06 19:59:52,845 INFO L354 Elim1Store]: treesize reduction 65, result has 40.9 percent of original size [2021-12-06 19:59:52,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 60 treesize of output 91 [2021-12-06 19:59:53,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-12-06 19:59:53,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-12-06 19:59:53,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2021-12-06 19:59:53,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-12-06 19:59:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:59:53,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:59:54,014 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_680) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))))))) (_ bv1 1)))) is different from false [2021-12-06 19:59:54,081 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_43 (_ BitVec 32)) (v_ArrVal_677 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_43)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_43 v_ArrVal_677) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_43 v_ArrVal_680) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))))))) is different from false [2021-12-06 19:59:54,105 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_43 (_ BitVec 32)) (v_ArrVal_677 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_43)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_43 v_ArrVal_677) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_43 v_ArrVal_680) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))))))))))))) is different from false [2021-12-06 19:59:54,297 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 19:59:54,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2021-12-06 19:59:54,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 413 treesize of output 287 [2021-12-06 19:59:54,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 246 [2021-12-06 19:59:54,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 230 [2021-12-06 19:59:56,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1057391524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:59:56,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:59:56,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-12-06 19:59:56,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177663837] [2021-12-06 19:59:56,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:59:56,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 19:59:56,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 19:59:56,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 19:59:56,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=521, Unknown=10, NotChecked=306, Total=930 [2021-12-06 19:59:56,534 INFO L87 Difference]: Start difference. First operand 475 states and 705 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:59:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:59:57,947 INFO L93 Difference]: Finished difference Result 648 states and 798 transitions. [2021-12-06 19:59:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 19:59:57,947 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2021-12-06 19:59:57,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:59:57,950 INFO L225 Difference]: With dead ends: 648 [2021-12-06 19:59:57,950 INFO L226 Difference]: Without dead ends: 648 [2021-12-06 19:59:57,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 22 SemanticMatches, 31 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=112, Invalid=604, Unknown=10, NotChecked=330, Total=1056 [2021-12-06 19:59:57,951 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 275 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 2374 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 835 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:59:57,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 2374 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 610 Invalid, 0 Unknown, 835 Unchecked, 1.1s Time] [2021-12-06 19:59:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-12-06 19:59:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 503. [2021-12-06 19:59:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 337 states have (on average 1.7922848664688427) internal successors, (604), 458 states have internal predecessors, (604), 45 states have call successors, (45), 7 states have call predecessors, (45), 4 states have return successors, (89), 43 states have call predecessors, (89), 45 states have call successors, (89) [2021-12-06 19:59:57,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 738 transitions. [2021-12-06 19:59:57,964 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 738 transitions. Word has length 38 [2021-12-06 19:59:57,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:59:57,965 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 738 transitions. [2021-12-06 19:59:57,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 18 states have internal predecessors, (65), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 19:59:57,965 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 738 transitions. [2021-12-06 19:59:57,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 19:59:57,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:59:57,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:59:57,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 19:59:58,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-12-06 19:59:58,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 19:59:58,367 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 19:59:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:59:58,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1128231941, now seen corresponding path program 1 times [2021-12-06 19:59:58,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 19:59:58,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889062894] [2021-12-06 19:59:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:59:58,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 19:59:58,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 19:59:58,370 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 19:59:58,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 19:59:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:59:58,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 19:59:58,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:59:58,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 19:59:58,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 19:59:58,865 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 19:59:58,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 19:59:58,928 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:59:58,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 19:59:58,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 19:59:59,012 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 19:59:59,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 19:59:59,105 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 19:59:59,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 47 [2021-12-06 19:59:59,209 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 19:59:59,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 19:59:59,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 19:59:59,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 19:59:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:59:59,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:59:59,398 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_762 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_762) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) is different from false [2021-12-06 19:59:59,416 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_47 (_ BitVec 32)) (v_ArrVal_762 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_47)))))))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_47 v_ArrVal_762) |c_append_#in~head.base|) |c_append_#in~head.offset|) (_ bv0 32))))) is different from false [2021-12-06 19:59:59,435 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_47 (_ BitVec 32)) (v_ArrVal_762 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_47)))))))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_47 v_ArrVal_762) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv0 32))))) is different from false [2021-12-06 19:59:59,669 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 19:59:59,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-12-06 19:59:59,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 19:59:59,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 32 [2021-12-06 19:59:59,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 19:59:59,690 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 19:59:59,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 20:00:00,060 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 20:00:00,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-12-06 20:00:00,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:00:00,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 68 [2021-12-06 20:00:00,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-12-06 20:00:00,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-12-06 20:00:00,551 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 20:00:00,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:00:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-06 20:00:00,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:00:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889062894] [2021-12-06 20:00:00,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889062894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:00:00,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:00:00,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-12-06 20:00:00,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805511801] [2021-12-06 20:00:00,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:00:00,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:00:00,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:00:00,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:00:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=465, Unknown=8, NotChecked=138, Total=702 [2021-12-06 20:00:00,770 INFO L87 Difference]: Start difference. First operand 503 states and 738 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 23 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:00:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:00:03,572 INFO L93 Difference]: Finished difference Result 681 states and 830 transitions. [2021-12-06 20:00:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 20:00:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 23 states have internal predecessors, (58), 4 states have call successors, (4), 4 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 38 [2021-12-06 20:00:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:00:03,575 INFO L225 Difference]: With dead ends: 681 [2021-12-06 20:00:03,575 INFO L226 Difference]: Without dead ends: 681 [2021-12-06 20:00:03,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=142, Invalid=732, Unknown=8, NotChecked=174, Total=1056 [2021-12-06 20:00:03,576 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 524 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 2729 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1427 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:00:03,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 2729 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1235 Invalid, 0 Unknown, 1427 Unchecked, 2.2s Time] [2021-12-06 20:00:03,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-12-06 20:00:03,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 544. [2021-12-06 20:00:03,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 376 states have (on average 1.7180851063829787) internal successors, (646), 497 states have internal predecessors, (646), 45 states have call successors, (45), 9 states have call predecessors, (45), 6 states have return successors, (89), 43 states have call predecessors, (89), 45 states have call successors, (89) [2021-12-06 20:00:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 780 transitions. [2021-12-06 20:00:03,591 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 780 transitions. Word has length 38 [2021-12-06 20:00:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:00:03,591 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 780 transitions. [2021-12-06 20:00:03,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 23 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:00:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 780 transitions. [2021-12-06 20:00:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 20:00:03,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:00:03,592 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 20:00:03,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 20:00:03,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:00:03,793 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:00:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:00:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1158728016, now seen corresponding path program 1 times [2021-12-06 20:00:03,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:00:03,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770586300] [2021-12-06 20:00:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:00:03,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:00:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:00:03,799 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:00:03,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 20:00:04,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:04,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 20:00:04,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:00:04,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:00:04,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:00:04,273 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 20:00:04,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:00:04,335 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:00:04,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 20:00:04,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:00:04,411 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:00:04,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 20:00:04,504 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-06 20:00:04,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 46 [2021-12-06 20:00:04,666 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 20:00:04,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-12-06 20:00:04,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 20:00:04,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-06 20:00:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:00:04,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:00:04,864 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_846) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) is different from false [2021-12-06 20:00:04,881 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_52 (_ BitVec 32))) (or (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_52)))))) (_ bv0 1))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_52 v_ArrVal_846) |c_append_#in~head.base|) |c_append_#in~head.offset|) (_ bv0 32))))) is different from false [2021-12-06 20:00:04,900 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_846 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_52 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_52 v_ArrVal_846) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_52))))))))))) is different from false [2021-12-06 20:00:05,181 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 20:00:05,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-12-06 20:00:05,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:00:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2021-12-06 20:00:05,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 20:00:05,207 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 20:00:05,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:00:05,613 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 20:00:05,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-12-06 20:00:05,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:00:05,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 68 [2021-12-06 20:00:05,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-12-06 20:00:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-12-06 20:00:06,051 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 20:00:06,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-12-06 20:00:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-12-06 20:00:06,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:00:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770586300] [2021-12-06 20:00:06,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770586300] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:00:06,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:00:06,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-12-06 20:00:06,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166521609] [2021-12-06 20:00:06,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:00:06,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:00:06,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:00:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:00:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=465, Unknown=8, NotChecked=138, Total=702 [2021-12-06 20:00:06,250 INFO L87 Difference]: Start difference. First operand 544 states and 780 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 23 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:00:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:00:10,467 INFO L93 Difference]: Finished difference Result 887 states and 1039 transitions. [2021-12-06 20:00:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:00:10,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 23 states have internal predecessors, (62), 4 states have call successors, (4), 4 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 40 [2021-12-06 20:00:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:00:10,471 INFO L225 Difference]: With dead ends: 887 [2021-12-06 20:00:10,471 INFO L226 Difference]: Without dead ends: 887 [2021-12-06 20:00:10,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=810, Unknown=14, NotChecked=186, Total=1190 [2021-12-06 20:00:10,472 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 1077 mSDsluCounter, 2042 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 4503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2503 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:00:10,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 2229 Invalid, 4503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1871 Invalid, 0 Unknown, 2503 Unchecked, 3.5s Time] [2021-12-06 20:00:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-12-06 20:00:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 519. [2021-12-06 20:00:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 354 states have (on average 1.7401129943502824) internal successors, (616), 474 states have internal predecessors, (616), 43 states have call successors, (43), 8 states have call predecessors, (43), 5 states have return successors, (82), 42 states have call predecessors, (82), 43 states have call successors, (82) [2021-12-06 20:00:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 741 transitions. [2021-12-06 20:00:10,491 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 741 transitions. Word has length 40 [2021-12-06 20:00:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:00:10,491 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 741 transitions. [2021-12-06 20:00:10,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 23 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:00:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 741 transitions. [2021-12-06 20:00:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 20:00:10,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:00:10,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:00:10,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 20:00:10,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:00:10,694 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:00:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:00:10,695 INFO L85 PathProgramCache]: Analyzing trace with hash -384479460, now seen corresponding path program 1 times [2021-12-06 20:00:10,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:00:10,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164058464] [2021-12-06 20:00:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:00:10,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:00:10,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:00:10,700 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:00:10,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 20:00:10,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 20:00:10,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:00:11,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:00:11,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:00:11,308 INFO L354 Elim1Store]: treesize reduction 62, result has 37.4 percent of original size [2021-12-06 20:00:11,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 67 [2021-12-06 20:00:11,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 20:00:11,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 20:00:11,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 20:00:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 20 [2021-12-06 20:00:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:00:12,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:00:12,190 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_961 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_961) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))))))) is different from false [2021-12-06 20:00:12,208 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_961 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_961) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))))))) (_ bv1 1)))) is different from false [2021-12-06 20:00:12,296 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_57 (_ BitVec 32)) (v_ArrVal_961 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_958 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvadd (bvneg v_ArrVal_958) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_57 v_ArrVal_958) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_57 v_ArrVal_961) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_57)))))) is different from false [2021-12-06 20:00:12,350 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_57 (_ BitVec 32)) (v_ArrVal_961 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_958 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvadd (bvneg v_ArrVal_958) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_57)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_57 v_ArrVal_958) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_57 v_ArrVal_961) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))))))))))) (_ bv1 1))))) is different from false [2021-12-06 20:00:12,528 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_57 (_ BitVec 32)) (v_ArrVal_961 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_958 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_57 v_ArrVal_958) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_57 v_ArrVal_961) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg v_ArrVal_958) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_57)))))) is different from false [2021-12-06 20:00:12,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:00:12,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2021-12-06 20:00:12,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:00:12,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 73 [2021-12-06 20:00:12,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 20:00:34,755 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-06 20:00:34,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 212 treesize of output 1 [2021-12-06 20:00:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 9 not checked. [2021-12-06 20:00:34,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:00:34,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164058464] [2021-12-06 20:00:34,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164058464] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:00:34,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:00:34,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-06 20:00:34,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193112011] [2021-12-06 20:00:34,768 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:00:34,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:00:34,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:00:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:00:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=129, Unknown=5, NotChecked=130, Total=306 [2021-12-06 20:00:34,769 INFO L87 Difference]: Start difference. First operand 519 states and 741 transitions. Second operand has 18 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:00:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:00:38,674 INFO L93 Difference]: Finished difference Result 774 states and 1015 transitions. [2021-12-06 20:00:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 20:00:38,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-12-06 20:00:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:00:38,678 INFO L225 Difference]: With dead ends: 774 [2021-12-06 20:00:38,678 INFO L226 Difference]: Without dead ends: 774 [2021-12-06 20:00:38,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 20 SemanticMatches, 21 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=91, Invalid=230, Unknown=5, NotChecked=180, Total=506 [2021-12-06 20:00:38,679 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 315 mSDsluCounter, 2865 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 3352 SdHoareTripleChecker+Invalid, 3770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2843 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:00:38,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 3352 Invalid, 3770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 884 Invalid, 0 Unknown, 2843 Unchecked, 2.1s Time] [2021-12-06 20:00:38,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-12-06 20:00:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 543. [2021-12-06 20:00:38,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 378 states have (on average 1.7037037037037037) internal successors, (644), 496 states have internal predecessors, (644), 43 states have call successors, (43), 10 states have call predecessors, (43), 5 states have return successors, (82), 42 states have call predecessors, (82), 43 states have call successors, (82) [2021-12-06 20:00:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 769 transitions. [2021-12-06 20:00:38,691 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 769 transitions. Word has length 53 [2021-12-06 20:00:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:00:38,691 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 769 transitions. [2021-12-06 20:00:38,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:00:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 769 transitions. [2021-12-06 20:00:38,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 20:00:38,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:00:38,692 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:00:38,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 20:00:38,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:00:38,893 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:00:38,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:00:38,894 INFO L85 PathProgramCache]: Analyzing trace with hash -384479459, now seen corresponding path program 1 times [2021-12-06 20:00:38,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:00:38,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877505572] [2021-12-06 20:00:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:00:38,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:00:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:00:38,896 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:00:38,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 20:00:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:00:39,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:00:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:00:39,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:00:39,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:00:39,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:00:39,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 20:00:39,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 20:00:39,579 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-12-06 20:00:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 20:00:39,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 20:00:39,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 20:00:39,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 20:00:39,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 20:00:39,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 20:00:39,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 20:00:39,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-06 20:00:39,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 20:00:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:00:39,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:00:40,093 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1074 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1073 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1073) c_append_~head.base) .cse0) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1074) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_1073 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1073) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse1 (_ bv5 32)) (bvadd .cse1 (_ bv9 32)))))) is different from false [2021-12-06 20:00:41,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:00:41,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 95 [2021-12-06 20:00:41,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:00:41,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 75 [2021-12-06 20:00:41,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:00:41,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 108 [2021-12-06 20:00:41,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:00:41,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 158 [2021-12-06 20:00:41,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 111 [2021-12-06 20:00:41,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 103 [2021-12-06 20:00:42,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 95 [2021-12-06 20:00:43,204 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 20:00:43,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2021-12-06 20:00:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 9 not checked. [2021-12-06 20:00:45,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:00:45,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877505572] [2021-12-06 20:00:45,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877505572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:00:45,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:00:45,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-06 20:00:45,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844905954] [2021-12-06 20:00:45,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:00:45,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:00:45,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:00:45,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:00:45,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=167, Unknown=8, NotChecked=26, Total=240 [2021-12-06 20:00:45,901 INFO L87 Difference]: Start difference. First operand 543 states and 769 transitions. Second operand has 16 states, 13 states have (on average 5.769230769230769) internal successors, (75), 14 states have internal predecessors, (75), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:01:04,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:01:06,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:01:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:01:14,388 INFO L93 Difference]: Finished difference Result 567 states and 795 transitions. [2021-12-06 20:01:14,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:01:14,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 5.769230769230769) internal successors, (75), 14 states have internal predecessors, (75), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-12-06 20:01:14,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:01:14,394 INFO L225 Difference]: With dead ends: 567 [2021-12-06 20:01:14,394 INFO L226 Difference]: Without dead ends: 567 [2021-12-06 20:01:14,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=108, Invalid=346, Unknown=12, NotChecked=40, Total=506 [2021-12-06 20:01:14,395 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 68 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1886 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 908 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:01:14,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1886 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 650 Invalid, 2 Unknown, 908 Unchecked, 7.3s Time] [2021-12-06 20:01:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-12-06 20:01:14,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 548. [2021-12-06 20:01:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 383 states have (on average 1.6971279373368147) internal successors, (650), 500 states have internal predecessors, (650), 43 states have call successors, (43), 11 states have call predecessors, (43), 5 states have return successors, (82), 42 states have call predecessors, (82), 43 states have call successors, (82) [2021-12-06 20:01:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 775 transitions. [2021-12-06 20:01:14,406 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 775 transitions. Word has length 53 [2021-12-06 20:01:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:01:14,407 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 775 transitions. [2021-12-06 20:01:14,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 5.769230769230769) internal successors, (75), 14 states have internal predecessors, (75), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:01:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 775 transitions. [2021-12-06 20:01:14,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 20:01:14,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:01:14,408 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 20:01:14,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 20:01:14,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:01:14,608 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:01:14,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:01:14,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2051262241, now seen corresponding path program 2 times [2021-12-06 20:01:14,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:01:14,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214533649] [2021-12-06 20:01:14,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:01:14,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:01:14,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:01:14,610 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:01:14,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 20:01:14,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:01:14,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:01:14,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 20:01:14,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:01:14,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:01:15,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:01:15,167 INFO L354 Elim1Store]: treesize reduction 62, result has 37.4 percent of original size [2021-12-06 20:01:15,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 60 [2021-12-06 20:01:15,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 20:01:15,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 20:01:15,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 20:01:15,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2021-12-06 20:01:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:01:15,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:01:15,945 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1184 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1184) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))))) (_ bv1 1)))) is different from false [2021-12-06 20:01:15,994 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1184 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_73 (_ BitVec 32)) (v_ArrVal_1181 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_73 v_ArrVal_1181) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_73 v_ArrVal_1184) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1181)) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_73)))))) is different from false [2021-12-06 20:01:16,040 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1184 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_73 (_ BitVec 32)) (v_ArrVal_1181 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_73 v_ArrVal_1181) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_73 v_ArrVal_1184) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1181)) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_73)))))) is different from false [2021-12-06 20:01:16,194 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1184 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_73 (_ BitVec 32)) (v_ArrVal_1181 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1181)) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_73 v_ArrVal_1181) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_73 v_ArrVal_1184) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_73)))))) is different from false [2021-12-06 20:01:16,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:01:16,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2021-12-06 20:01:16,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:01:16,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 79 [2021-12-06 20:01:16,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-12-06 20:01:48,001 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-06 20:01:48,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 346 treesize of output 1 [2021-12-06 20:01:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-12-06 20:01:48,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:01:48,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214533649] [2021-12-06 20:01:48,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214533649] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:01:48,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:01:48,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-06 20:01:48,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339363936] [2021-12-06 20:01:48,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:01:48,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:01:48,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:01:48,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:01:48,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=144, Unknown=11, NotChecked=108, Total=306 [2021-12-06 20:01:48,017 INFO L87 Difference]: Start difference. First operand 548 states and 775 transitions. Second operand has 18 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:01:59,346 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_211 (_ BitVec 32)) (v_append_~node~0.base_73 (_ BitVec 32)) (v_ArrVal_1181 (_ BitVec 1))) (let ((.cse0 (= v_append_~node~0.base_73 |c_append_#in~head.base|))) (or (and (forall ((v_arrayElimCell_213 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_73 v_ArrVal_1181) v_arrayElimCell_213)))))))))))))) (_ bv1 1)))) .cse0) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1181)) (_ bv1 1)))) (and (= |c_append_#in~head.base| c_append_~head.base) (not (= v_arrayElimCell_211 c_append_~node~0.base)) (= c_append_~head.offset |c_append_#in~head.offset|)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_73)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_73 v_ArrVal_1181) v_arrayElimCell_211)))))))))))))) (_ bv1 1))) (not .cse0))))) (forall ((v_ArrVal_1184 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_73 (_ BitVec 32)) (v_ArrVal_1181 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1181)) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_73 v_ArrVal_1181) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_73 v_ArrVal_1184) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_73))))))) is different from false [2021-12-06 20:02:04,670 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_211 (_ BitVec 32)) (v_append_~node~0.base_73 (_ BitVec 32)) (v_ArrVal_1181 (_ BitVec 1))) (let ((.cse0 (= v_append_~node~0.base_73 |c_append_#in~head.base|))) (or (and (forall ((v_arrayElimCell_213 (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_73 v_ArrVal_1181) v_arrayElimCell_213)))))))))))))) (_ bv1 1)))) .cse0) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_1181)) (_ bv1 1)))) (and (= |c_append_#in~head.base| c_append_~head.base) (not (= v_arrayElimCell_211 c_append_~node~0.base)) (= c_append_~head.offset |c_append_#in~head.offset|)) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_73)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_73 v_ArrVal_1181) v_arrayElimCell_211)))))))))))))) (_ bv1 1))) (not .cse0))))) (forall ((v_ArrVal_1184 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1184) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))))))) (_ bv1 1))))) is different from false [2021-12-06 20:02:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:16,897 INFO L93 Difference]: Finished difference Result 918 states and 1262 transitions. [2021-12-06 20:02:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 20:02:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2021-12-06 20:02:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:16,902 INFO L225 Difference]: With dead ends: 918 [2021-12-06 20:02:16,902 INFO L226 Difference]: Without dead ends: 918 [2021-12-06 20:02:16,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=174, Invalid=573, Unknown=33, NotChecked=342, Total=1122 [2021-12-06 20:02:16,903 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 328 mSDsluCounter, 3451 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 3941 SdHoareTripleChecker+Invalid, 3766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3079 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:16,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 3941 Invalid, 3766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 647 Invalid, 0 Unknown, 3079 Unchecked, 1.6s Time] [2021-12-06 20:02:16,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-12-06 20:02:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 642. [2021-12-06 20:02:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 461 states have (on average 1.6225596529284165) internal successors, (748), 579 states have internal predecessors, (748), 57 states have call successors, (57), 14 states have call predecessors, (57), 7 states have return successors, (163), 56 states have call predecessors, (163), 57 states have call successors, (163) [2021-12-06 20:02:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 968 transitions. [2021-12-06 20:02:16,921 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 968 transitions. Word has length 55 [2021-12-06 20:02:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:02:16,921 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 968 transitions. [2021-12-06 20:02:16,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:02:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 968 transitions. [2021-12-06 20:02:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 20:02:16,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:02:16,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-12-06 20:02:16,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 20:02:17,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:02:17,123 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting appendErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:02:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2068403864, now seen corresponding path program 1 times [2021-12-06 20:02:17,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:02:17,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383259004] [2021-12-06 20:02:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:17,124 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:02:17,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:02:17,124 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:02:17,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 20:02:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:17,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 20:02:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:02:17,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:02:17,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:02:17,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:02:17,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:02:17,826 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-12-06 20:02:17,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2021-12-06 20:02:17,864 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-12-06 20:02:17,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-12-06 20:02:17,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 20:02:17,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 20:02:18,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 20:02:18,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 20:02:18,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 20:02:18,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 20:02:18,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-06 20:02:18,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 20:02:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 20:02:18,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:02:18,320 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1297 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (bvadd c_append_~head.offset (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1298) c_append_~head.base) .cse0) (_ bv9 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_1297) c_append_~head.base) .cse0))))) (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_1298) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))) (bvule (bvadd .cse1 (_ bv5 32)) (bvadd .cse1 (_ bv9 32)))))) is different from false [2021-12-06 20:02:18,562 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_81 (_ BitVec 32))) (or (and (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1297 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1292 (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_81 v_ArrVal_1298) |c_append_#in~head.base|) .cse0) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_81 v_ArrVal_1292) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_81 v_ArrVal_1297) |c_append_#in~head.base|) .cse0))))) (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_81 v_ArrVal_1298) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))) (bvule (bvadd .cse1 (_ bv5 32)) (bvadd .cse1 (_ bv9 32)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_81)))))) is different from false [2021-12-06 20:02:18,661 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_81 (_ BitVec 32))) (or (and (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1297 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1292 (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_81 v_ArrVal_1298) |c_ULTIMATE.start_main_~list~0#1.base|) .cse0) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_81 v_ArrVal_1292) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_81 v_ArrVal_1297) |c_ULTIMATE.start_main_~list~0#1.base|) .cse0))))) (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_81 v_ArrVal_1298) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))) (bvule (bvadd .cse1 (_ bv5 32)) (bvadd .cse1 (_ bv9 32)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_81)))))) is different from false [2021-12-06 20:02:19,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:02:19,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 95 [2021-12-06 20:02:19,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:02:19,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 75 [2021-12-06 20:02:19,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:02:19,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 108 [2021-12-06 20:02:19,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:02:19,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 158 [2021-12-06 20:02:19,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 111 [2021-12-06 20:02:19,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 103 [2021-12-06 20:02:19,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 95 [2021-12-06 20:02:30,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:02:30,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2021-12-06 20:02:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 9 not checked. [2021-12-06 20:02:30,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:02:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383259004] [2021-12-06 20:02:30,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383259004] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:02:30,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:02:30,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-12-06 20:02:30,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379542746] [2021-12-06 20:02:30,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:02:30,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 20:02:30,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:02:30,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 20:02:30,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=127, Unknown=3, NotChecked=72, Total=240 [2021-12-06 20:02:30,131 INFO L87 Difference]: Start difference. First operand 642 states and 968 transitions. Second operand has 16 states, 15 states have (on average 5.133333333333334) internal successors, (77), 16 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:02:33,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:02:33,861 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_append_#in~head.base|) .cse0)) (.cse1 (bvadd c_append_~head.offset (_ bv4 32)))) (and (= |c_append_#in~head.base| c_append_~head.base) (= (select (select |c_#memory_$Pointer$.offset| |c_append_#in~head.base|) .cse0) (_ bv0 32)) (= c_append_~node~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_append_~head.base) .cse1) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| .cse2)) (_ bv1 1))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_append_#in~head.base|)))) (forall ((v_append_~node~0.base_81 (_ BitVec 32))) (or (and (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1297 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1292 (_ BitVec 32))) (let ((.cse3 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_81 v_ArrVal_1298) |c_append_#in~head.base|) .cse3) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_81 v_ArrVal_1292) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_81 v_ArrVal_1297) |c_append_#in~head.base|) .cse3))))) (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_81 v_ArrVal_1298) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))) (bvule (bvadd .cse4 (_ bv5 32)) (bvadd .cse4 (_ bv9 32)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_81)))))) (= c_append_~head.offset |c_append_#in~head.offset|) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_append_~node~0.base)) (_ bv1 1))) (= (select |c_#length| .cse2) (_ bv9 32)) (= (select |c_#length| (select (select |c_#memory_$Pointer$.base| c_append_~head.base) .cse1)) (_ bv9 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_append_~head.base)) (_ bv1 1))) (= (select |c_#length| c_append_~node~0.base) (_ bv9 32))))) is different from false [2021-12-06 20:02:36,792 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_append_#in~head.base|) .cse0))) (and (= (select (select |c_#memory_$Pointer$.offset| |c_append_#in~head.base|) .cse0) (_ bv0 32)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| .cse1)) (_ bv1 1))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (select |c_#valid| |c_append_#in~head.base|)))) (forall ((v_append_~node~0.base_81 (_ BitVec 32))) (or (and (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1297 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1292 (_ BitVec 32))) (let ((.cse2 (bvadd (_ bv4 32) |c_append_#in~head.offset|))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_81 v_ArrVal_1298) |c_append_#in~head.base|) .cse2) (_ bv9 32)) (select (store |c_#length| v_append_~node~0.base_81 v_ArrVal_1292) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_81 v_ArrVal_1297) |c_append_#in~head.base|) .cse2))))) (forall ((v_ArrVal_1298 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| v_append_~node~0.base_81 v_ArrVal_1298) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))) (bvule (bvadd .cse3 (_ bv5 32)) (bvadd .cse3 (_ bv9 32)))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_81)))))) (= (select |c_#length| .cse1) (_ bv9 32))))) is different from false [2021-12-06 20:02:43,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:02:45,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:02:47,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:02:49,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:02:51,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 20:02:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:02:59,121 INFO L93 Difference]: Finished difference Result 897 states and 1235 transitions. [2021-12-06 20:02:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:02:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.133333333333334) internal successors, (77), 16 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2021-12-06 20:02:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:02:59,126 INFO L225 Difference]: With dead ends: 897 [2021-12-06 20:02:59,126 INFO L226 Difference]: Without dead ends: 897 [2021-12-06 20:02:59,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=133, Invalid=342, Unknown=7, NotChecked=220, Total=702 [2021-12-06 20:02:59,127 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 293 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 49 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2899 SdHoareTripleChecker+Invalid, 4899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 2111 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:02:59,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 2899 Invalid, 4899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2734 Invalid, 5 Unknown, 2111 Unchecked, 20.6s Time] [2021-12-06 20:02:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-12-06 20:02:59,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 617. [2021-12-06 20:02:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 436 states have (on average 1.6444954128440368) internal successors, (717), 555 states have internal predecessors, (717), 57 states have call successors, (57), 13 states have call predecessors, (57), 7 states have return successors, (163), 56 states have call predecessors, (163), 57 states have call successors, (163) [2021-12-06 20:02:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 937 transitions. [2021-12-06 20:02:59,144 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 937 transitions. Word has length 56 [2021-12-06 20:02:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:02:59,144 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 937 transitions. [2021-12-06 20:02:59,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.133333333333334) internal successors, (77), 16 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 20:02:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 937 transitions. [2021-12-06 20:02:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 20:02:59,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:02:59,145 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-12-06 20:02:59,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 20:02:59,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:02:59,346 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:02:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:02:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1149564732, now seen corresponding path program 1 times [2021-12-06 20:02:59,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:02:59,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180054066] [2021-12-06 20:02:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:02:59,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:02:59,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:02:59,352 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:02:59,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 20:02:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:02:59,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:02:59,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:02:59,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:03:00,131 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32)) (v_ArrVal_1437 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_1437) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| append_~node~0.base))))))) is different from true [2021-12-06 20:03:00,181 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| append_~node~0.base))))) (or (not |c_append_#t~short58|) (exists ((v_ArrVal_1437 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_1437) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32)))))) is different from true [2021-12-06 20:03:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-12-06 20:03:00,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:03:00,522 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_92 (_ BitVec 32)) (v_ArrVal_1440 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_92 v_ArrVal_1440) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_92)))))))))) is different from false [2021-12-06 20:03:00,524 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:03:00,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180054066] [2021-12-06 20:03:00,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180054066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:03:00,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [978913090] [2021-12-06 20:03:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:03:00,524 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:03:00,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:03:00,525 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:03:00,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-06 20:03:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 20:03:01,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:03:01,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:03:02,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:03:04,140 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 20:03:04,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:03:06,246 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:03:06,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 20:03:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:03:06,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 20:03:06,389 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:03:06,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 20:03:06,540 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 20:03:06,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 63 [2021-12-06 20:03:07,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:03:07,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:03:07,639 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-12-06 20:03:07,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 105 [2021-12-06 20:03:07,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:03:07,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 81 [2021-12-06 20:03:07,670 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 20:03:07,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2021-12-06 20:03:07,710 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:03:07,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-12-06 20:03:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:03:14,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:03:14,580 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1591 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_96 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_96 v_ArrVal_1591) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_96)))))) is different from false [2021-12-06 20:03:14,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [978913090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:03:14,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:03:14,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 30 [2021-12-06 20:03:14,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127870078] [2021-12-06 20:03:14,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:03:14,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 20:03:14,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:03:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 20:03:14,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=623, Unknown=68, NotChecked=220, Total=992 [2021-12-06 20:03:14,584 INFO L87 Difference]: Start difference. First operand 617 states and 937 transitions. Second operand has 30 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 26 states have internal predecessors, (106), 6 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:03:19,098 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (bvneg (select |c_old(#valid)| c_append_~node~0.base)))) (and (= |c_append_#in~head.base| c_append_~head.base) (or (not |c_append_#t~short58|) (exists ((v_ArrVal_1578 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_1578) |c_append_#in~head.base|) |c_append_#in~head.offset|) (_ bv0 32)))) (= (_ bv0 1) .cse0) (not (= c_append_~node~0.base (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg .cse0))) (= c_append_~head.offset |c_append_#in~head.offset|) (exists ((v_ArrVal_1578 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_1578) |c_#memory_$Pointer$.base|)))) is different from true [2021-12-06 20:03:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:03:46,873 INFO L93 Difference]: Finished difference Result 638 states and 975 transitions. [2021-12-06 20:03:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:03:46,873 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 26 states have internal predecessors, (106), 6 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 68 [2021-12-06 20:03:46,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:03:46,877 INFO L225 Difference]: With dead ends: 638 [2021-12-06 20:03:46,877 INFO L226 Difference]: Without dead ends: 638 [2021-12-06 20:03:46,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=222, Invalid=1904, Unknown=150, NotChecked=480, Total=2756 [2021-12-06 20:03:46,878 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 19 mSDsluCounter, 4620 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 4912 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1200 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:03:46,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 4912 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1241 Invalid, 0 Unknown, 1200 Unchecked, 2.2s Time] [2021-12-06 20:03:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-06 20:03:46,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 616. [2021-12-06 20:03:46,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 436 states have (on average 1.6444954128440368) internal successors, (717), 555 states have internal predecessors, (717), 56 states have call successors, (56), 13 states have call predecessors, (56), 7 states have return successors, (158), 55 states have call predecessors, (158), 56 states have call successors, (158) [2021-12-06 20:03:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 931 transitions. [2021-12-06 20:03:46,895 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 931 transitions. Word has length 68 [2021-12-06 20:03:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:03:46,896 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 931 transitions. [2021-12-06 20:03:46,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 26 states have internal predecessors, (106), 6 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:03:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 931 transitions. [2021-12-06 20:03:46,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 20:03:46,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:03:46,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2021-12-06 20:03:46,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-12-06 20:03:47,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 20:03:47,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:03:47,298 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:03:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:03:47,300 INFO L85 PathProgramCache]: Analyzing trace with hash 112512729, now seen corresponding path program 1 times [2021-12-06 20:03:47,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:03:47,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781399348] [2021-12-06 20:03:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:03:47,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:03:47,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:03:47,302 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:03:47,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 20:03:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:47,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:03:47,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:03:47,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:03:48,123 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32)) (v_ArrVal_1724 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_1724) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:03:48,239 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_1724 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_1724) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:03:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-12-06 20:03:48,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:03:48,531 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1727 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_100 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_100)))))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_100 v_ArrVal_1727) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))))) is different from false [2021-12-06 20:03:48,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:03:48,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781399348] [2021-12-06 20:03:48,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781399348] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:03:48,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [171284413] [2021-12-06 20:03:48,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:03:48,533 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:03:48,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:03:48,534 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:03:48,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-06 20:03:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:03:49,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 20:03:49,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:03:49,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:03:50,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:03:52,162 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 20:03:52,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:03:54,262 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:03:54,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 20:03:54,271 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 20:03:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 20:03:54,403 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:03:54,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 20:03:56,561 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 20:03:56,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2021-12-06 20:03:57,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:03:57,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:03:57,831 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-12-06 20:03:57,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 105 [2021-12-06 20:03:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:03:57,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 81 [2021-12-06 20:03:57,864 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 20:03:57,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-06 20:03:57,910 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:03:57,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-12-06 20:04:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 20:04:06,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:04:06,287 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_104 (_ BitVec 32)) (v_ArrVal_1878 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_104 v_ArrVal_1878) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_104)))))))) is different from false [2021-12-06 20:04:06,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [171284413] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:04:06,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:04:06,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 30 [2021-12-06 20:04:06,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172020862] [2021-12-06 20:04:06,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:04:06,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 20:04:06,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:04:06,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 20:04:06,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=70, NotChecked=220, Total=992 [2021-12-06 20:04:06,290 INFO L87 Difference]: Start difference. First operand 616 states and 931 transitions. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 28 states have internal predecessors, (110), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:04:08,703 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_append_#in~head.base| c_append_~head.base) (= (_ bv0 1) (bvneg (select |c_old(#valid)| c_append_~node~0.base))) (not (= c_append_~node~0.base (_ bv0 32))) (or (not |c_append_#t~short58|) (exists ((v_ArrVal_1865 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_1865) |c_append_#in~head.base|) |c_append_#in~head.offset|)))) (exists ((v_ArrVal_1865 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_1865) |c_#memory_$Pointer$.base|)) (= c_append_~head.offset |c_append_#in~head.offset|)) is different from true [2021-12-06 20:04:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:04:32,213 INFO L93 Difference]: Finished difference Result 632 states and 960 transitions. [2021-12-06 20:04:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 20:04:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 28 states have internal predecessors, (110), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 71 [2021-12-06 20:04:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:04:32,217 INFO L225 Difference]: With dead ends: 632 [2021-12-06 20:04:32,217 INFO L226 Difference]: Without dead ends: 626 [2021-12-06 20:04:32,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 134 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=234, Invalid=1976, Unknown=162, NotChecked=490, Total=2862 [2021-12-06 20:04:32,218 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 40 mSDsluCounter, 4051 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 4345 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1259 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:04:32,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 4345 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 956 Invalid, 0 Unknown, 1259 Unchecked, 1.8s Time] [2021-12-06 20:04:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-12-06 20:04:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 606. [2021-12-06 20:04:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 431 states have (on average 1.6450116009280742) internal successors, (709), 549 states have internal predecessors, (709), 52 states have call successors, (52), 13 states have call predecessors, (52), 6 states have return successors, (143), 51 states have call predecessors, (143), 52 states have call successors, (143) [2021-12-06 20:04:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 904 transitions. [2021-12-06 20:04:32,231 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 904 transitions. Word has length 71 [2021-12-06 20:04:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:04:32,231 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 904 transitions. [2021-12-06 20:04:32,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 28 states have internal predecessors, (110), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:04:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 904 transitions. [2021-12-06 20:04:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 20:04:32,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:04:32,232 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-12-06 20:04:32,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-12-06 20:04:32,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 20:04:32,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:04:32,633 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:04:32,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:04:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash 567147210, now seen corresponding path program 1 times [2021-12-06 20:04:32,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:04:32,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812242330] [2021-12-06 20:04:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:04:32,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:04:32,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:04:32,635 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:04:32,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 20:04:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:32,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:04:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:04:33,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:04:33,433 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32)) (v_ArrVal_2011 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2011) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|))) is different from true [2021-12-06 20:04:33,489 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (or (not |c_append_#t~short58|) (exists ((v_ArrVal_2011 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2011) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:04:33,516 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (exists ((v_ArrVal_2011 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2011) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32))))) is different from true [2021-12-06 20:04:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2021-12-06 20:04:33,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:04:33,768 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_108 (_ BitVec 32)) (v_ArrVal_2014 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_108 v_ArrVal_2014) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_108))))))))) is different from false [2021-12-06 20:04:33,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:04:33,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812242330] [2021-12-06 20:04:33,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812242330] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:04:33,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2080653274] [2021-12-06 20:04:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:04:33,770 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:04:33,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:04:33,771 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:04:33,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-06 20:04:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:04:34,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 20:04:34,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:04:34,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:04:35,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:04:35,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 20:04:35,247 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 20:04:35,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:04:35,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:04:35,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 20:04:35,348 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:04:35,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 20:04:35,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 20:04:35,391 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:04:35,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2021-12-06 20:04:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:04:35,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 20:04:35,539 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:04:35,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 20:04:35,567 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:04:35,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-12-06 20:04:35,752 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 20:04:35,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-12-06 20:04:36,277 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_append_#in~head.base| c_append_~head.base) (exists ((v_ArrVal_2159 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2159) |c_#memory_$Pointer$.base|)) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| c_append_~node~0.base))))) (let ((.cse0 (= (select (select |c_#memory_$Pointer$.base| c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (or (and (not |c_append_#t~short58|) (or (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (not .cse0))) (and |c_append_#t~short58| .cse0 (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))))) (= c_append_~head.offset |c_append_#in~head.offset|)) is different from true [2021-12-06 20:04:36,338 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_append_#in~head.base| c_append_~head.base) (exists ((v_ArrVal_2159 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2159) |c_#memory_$Pointer$.base|)) (or (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (not (= (select (select |c_#memory_$Pointer$.base| c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| c_append_~node~0.base))))) (= c_append_~head.offset |c_append_#in~head.offset|)) is different from true [2021-12-06 20:04:36,371 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| c_append_~head.base))) (and (= |c_append_#in~head.base| c_append_~head.base) (= (select .cse0 (bvadd c_append_~head.offset (_ bv4 32))) |c_append_#t~mem59.base|) (exists ((v_ArrVal_2159 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2159) |c_#memory_$Pointer$.base|)) (or (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (not (= (select .cse0 c_append_~head.offset) (_ bv0 32)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| c_append_~node~0.base))))) (= c_append_~head.offset |c_append_#in~head.offset|))) is different from true [2021-12-06 20:04:36,398 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_append_#in~head.base| c_append_~head.base) (or (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (exists ((v_ArrVal_2159 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2159) c_append_~head.base) c_append_~head.offset) (_ bv0 32))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| c_append_~node~0.base))))) (= c_append_~head.offset |c_append_#in~head.offset|) (exists ((v_ArrVal_2161 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2161) |c_#memory_$Pointer$.base|))) is different from true [2021-12-06 20:04:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:04:37,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:04:37,820 INFO L354 Elim1Store]: treesize reduction 58, result has 33.3 percent of original size [2021-12-06 20:04:37,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 115 [2021-12-06 20:04:37,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:04:37,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 111 [2021-12-06 20:04:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 20:04:37,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 81 [2021-12-06 20:04:37,855 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 20:04:37,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-12-06 20:04:37,897 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 20:04:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-12-06 20:04:38,829 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2166 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2166) |c_append_#in~head.base|) |c_append_#in~head.offset|) (_ bv0 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:04:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 34 proven. 20 refuted. 1 times theorem prover too weak. 0 trivial. 11 not checked. [2021-12-06 20:04:38,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:04:39,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_112 (_ BitVec 32)) (v_ArrVal_2171 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_112 v_ArrVal_2171) |c_ULTIMATE.start_main_~list~0#1.base|) |c_ULTIMATE.start_main_~list~0#1.offset|) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_112))))))) is different from false [2021-12-06 20:04:39,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2080653274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:04:39,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:04:39,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 30] total 38 [2021-12-06 20:04:39,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605199811] [2021-12-06 20:04:39,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:04:39,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 20:04:39,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:04:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 20:04:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=735, Unknown=78, NotChecked=650, Total=1560 [2021-12-06 20:04:39,062 INFO L87 Difference]: Start difference. First operand 606 states and 904 transitions. Second operand has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 35 states have internal predecessors, (117), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:04:55,184 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_append_#in~head.base| c_append_~head.base) (exists ((v_ArrVal_2159 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2159) |c_#memory_$Pointer$.base|)) (not (= c_append_~node~0.base (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| c_append_~node~0.base))))) (let ((.cse0 (= (select (select |c_#memory_$Pointer$.base| c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (or (and (not |c_append_#t~short58|) (or (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (not .cse0))) (and |c_append_#t~short58| .cse0 (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))))) (= c_append_~head.offset |c_append_#in~head.offset|)) is different from true [2021-12-06 20:04:55,190 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_append_#in~head.base| c_append_~head.base) (exists ((v_ArrVal_2159 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2159) |c_#memory_$Pointer$.base|)) (or (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (not (= (select (select |c_#memory_$Pointer$.base| c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (not (= c_append_~node~0.base (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| c_append_~node~0.base))))) (= c_append_~head.offset |c_append_#in~head.offset|)) is different from true [2021-12-06 20:04:55,197 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| c_append_~head.base))) (and (= |c_append_#in~head.base| c_append_~head.base) (= (select .cse0 (bvadd c_append_~head.offset (_ bv4 32))) |c_append_#t~mem59.base|) (exists ((v_ArrVal_2159 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2159) |c_#memory_$Pointer$.base|)) (or (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (not (= (select .cse0 c_append_~head.offset) (_ bv0 32)))) (not (= c_append_~node~0.base (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| c_append_~node~0.base))))) (= c_append_~head.offset |c_append_#in~head.offset|) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_append_~head.base)) (_ bv1 1))))) is different from true [2021-12-06 20:04:55,204 WARN L860 $PredicateComparison]: unable to prove that (and (= |c_append_#in~head.base| c_append_~head.base) (or (exists ((v_ArrVal_2158 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.offset)| c_append_~node~0.base v_ArrVal_2158) c_append_~head.base) c_append_~head.offset) (_ bv0 32)))) (exists ((v_ArrVal_2159 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2159) c_append_~head.base) c_append_~head.offset) (_ bv0 32))))) (not (= c_append_~node~0.base (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| c_append_~node~0.base))))) (= c_append_~head.offset |c_append_#in~head.offset|) (exists ((v_ArrVal_2161 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_2161) |c_#memory_$Pointer$.base|)) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_append_~head.base)) (_ bv1 1)))) is different from true [2021-12-06 20:04:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:04:58,657 INFO L93 Difference]: Finished difference Result 611 states and 914 transitions. [2021-12-06 20:04:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:04:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 35 states have internal predecessors, (117), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 74 [2021-12-06 20:04:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:04:58,660 INFO L225 Difference]: With dead ends: 611 [2021-12-06 20:04:58,660 INFO L226 Difference]: Without dead ends: 611 [2021-12-06 20:04:58,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=225, Invalid=2103, Unknown=178, NotChecked=1526, Total=4032 [2021-12-06 20:04:58,662 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 13 mSDsluCounter, 4628 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4933 SdHoareTripleChecker+Invalid, 4352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2941 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:04:58,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 4933 Invalid, 4352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1387 Invalid, 0 Unknown, 2941 Unchecked, 2.6s Time] [2021-12-06 20:04:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-12-06 20:04:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 606. [2021-12-06 20:04:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 431 states have (on average 1.6450116009280742) internal successors, (709), 549 states have internal predecessors, (709), 52 states have call successors, (52), 13 states have call predecessors, (52), 6 states have return successors, (142), 51 states have call predecessors, (142), 52 states have call successors, (142) [2021-12-06 20:04:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 903 transitions. [2021-12-06 20:04:58,674 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 903 transitions. Word has length 74 [2021-12-06 20:04:58,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:04:58,674 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 903 transitions. [2021-12-06 20:04:58,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 35 states have internal predecessors, (117), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 20:04:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 903 transitions. [2021-12-06 20:04:58,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 20:04:58,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:04:58,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:04:58,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-06 20:04:58,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-12-06 20:04:59,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 20:04:59,076 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:04:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:04:59,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1596800488, now seen corresponding path program 2 times [2021-12-06 20:04:59,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:04:59,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286472877] [2021-12-06 20:04:59,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:04:59,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:04:59,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:04:59,081 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:04:59,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 20:04:59,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:04:59,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:04:59,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:04:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:04:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 20:04:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:04:59,803 INFO L354 Elim1Store]: treesize reduction 62, result has 37.4 percent of original size [2021-12-06 20:04:59,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 61 [2021-12-06 20:04:59,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-12-06 20:05:00,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 20:05:00,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2021-12-06 20:05:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 20:05:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 20:05:00,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:05:00,484 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2308 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_2308) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))))))))))) is different from false [2021-12-06 20:05:00,562 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_113 (_ BitVec 32)) (v_ArrVal_2308 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2305 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_113)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_113 v_ArrVal_2305) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_113 v_ArrVal_2308) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))))) (_ bv1 1))))) is different from false [2021-12-06 20:05:00,587 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_113 (_ BitVec 32)) (v_ArrVal_2308 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2305 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_113))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_113 v_ArrVal_2305) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_113 v_ArrVal_2308) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))))))))))) (_ bv1 1))))) is different from false [2021-12-06 20:05:00,722 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_113 (_ BitVec 32)) (v_ArrVal_2308 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2305 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_113))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_113 v_ArrVal_2305) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_113 v_ArrVal_2308) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))))))))))) (_ bv1 1))))) is different from false [2021-12-06 20:05:00,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:05:00,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2021-12-06 20:05:00,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:05:00,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 73 [2021-12-06 20:05:00,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 20:05:13,246 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-06 20:05:13,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 302 treesize of output 1 [2021-12-06 20:05:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 9 not checked. [2021-12-06 20:05:13,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:05:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286472877] [2021-12-06 20:05:13,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286472877] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:05:13,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:05:13,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-12-06 20:05:13,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344133365] [2021-12-06 20:05:13,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:05:13,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:05:13,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:05:13,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:05:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=147, Unknown=7, NotChecked=108, Total=306 [2021-12-06 20:05:13,269 INFO L87 Difference]: Start difference. First operand 606 states and 903 transitions. Second operand has 18 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:05:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:05:16,994 INFO L93 Difference]: Finished difference Result 860 states and 1172 transitions. [2021-12-06 20:05:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 20:05:16,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2021-12-06 20:05:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:05:16,999 INFO L225 Difference]: With dead ends: 860 [2021-12-06 20:05:16,999 INFO L226 Difference]: Without dead ends: 860 [2021-12-06 20:05:16,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=77, Invalid=204, Unknown=7, NotChecked=132, Total=420 [2021-12-06 20:05:16,999 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 325 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 3844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2563 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 20:05:16,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 3487 Invalid, 3844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1235 Invalid, 0 Unknown, 2563 Unchecked, 2.8s Time] [2021-12-06 20:05:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-12-06 20:05:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 560. [2021-12-06 20:05:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 398 states have (on average 1.6758793969849246) internal successors, (667), 517 states have internal predecessors, (667), 39 states have call successors, (39), 10 states have call predecessors, (39), 6 states have return successors, (105), 38 states have call predecessors, (105), 39 states have call successors, (105) [2021-12-06 20:05:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 811 transitions. [2021-12-06 20:05:17,013 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 811 transitions. Word has length 74 [2021-12-06 20:05:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:05:17,013 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 811 transitions. [2021-12-06 20:05:17,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 6.2) internal successors, (93), 15 states have internal predecessors, (93), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:05:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 811 transitions. [2021-12-06 20:05:17,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 20:05:17,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:05:17,014 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 20:05:17,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-06 20:05:17,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:05:17,216 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:05:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:05:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1239972184, now seen corresponding path program 1 times [2021-12-06 20:05:17,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:05:17,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583706289] [2021-12-06 20:05:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:05:17,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:05:17,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:05:17,220 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:05:17,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 20:05:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:05:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:05:17,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:05:17,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:05:18,073 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32)) (v_ArrVal_2476 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2476) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:05:18,186 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (exists ((v_ArrVal_2476 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2476) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32))))) is different from true [2021-12-06 20:05:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 2 not checked. [2021-12-06 20:05:18,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:05:18,437 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_127 (_ BitVec 32)) (v_ArrVal_2479 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_127 v_ArrVal_2479) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_127))))))))) is different from false [2021-12-06 20:05:18,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:05:18,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583706289] [2021-12-06 20:05:18,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583706289] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:05:18,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [394485117] [2021-12-06 20:05:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:05:18,439 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:05:18,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:05:18,440 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:05:18,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-12-06 20:05:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:05:20,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 20:05:20,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:05:21,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:05:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 20:05:21,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:05:21,756 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2650 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_131 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_131 v_ArrVal_2650) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_131)))))) is different from false [2021-12-06 20:05:21,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [394485117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:05:21,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:05:21,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-12-06 20:05:21,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270120197] [2021-12-06 20:05:21,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:05:21,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 20:05:21,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:05:21,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 20:05:21,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=211, Unknown=29, NotChecked=132, Total=420 [2021-12-06 20:05:21,759 INFO L87 Difference]: Start difference. First operand 560 states and 811 transitions. Second operand has 19 states, 17 states have (on average 5.764705882352941) internal successors, (98), 16 states have internal predecessors, (98), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 20:05:28,170 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((append_~node~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_2645 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2645) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) (exists ((append_~node~0.base (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (exists ((v_ArrVal_2476 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2476) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32)))))) is different from true [2021-12-06 20:05:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:05:39,823 INFO L93 Difference]: Finished difference Result 1392 states and 1887 transitions. [2021-12-06 20:05:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 20:05:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 5.764705882352941) internal successors, (98), 16 states have internal predecessors, (98), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 85 [2021-12-06 20:05:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:05:39,829 INFO L225 Difference]: With dead ends: 1392 [2021-12-06 20:05:39,829 INFO L226 Difference]: Without dead ends: 1392 [2021-12-06 20:05:39,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=83, Invalid=398, Unknown=45, NotChecked=230, Total=756 [2021-12-06 20:05:39,830 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 767 mSDsluCounter, 7894 mSDsCounter, 0 mSdLazyCounter, 3019 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 8507 SdHoareTripleChecker+Invalid, 6807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3690 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:05:39,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 8507 Invalid, 6807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3019 Invalid, 0 Unknown, 3690 Unchecked, 5.5s Time] [2021-12-06 20:05:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2021-12-06 20:05:39,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 779. [2021-12-06 20:05:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 607 states have (on average 1.8220757825370675) internal successors, (1106), 727 states have internal predecessors, (1106), 49 states have call successors, (49), 10 states have call predecessors, (49), 6 states have return successors, (134), 49 states have call predecessors, (134), 49 states have call successors, (134) [2021-12-06 20:05:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1289 transitions. [2021-12-06 20:05:39,846 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1289 transitions. Word has length 85 [2021-12-06 20:05:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:05:39,846 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 1289 transitions. [2021-12-06 20:05:39,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 5.764705882352941) internal successors, (98), 16 states have internal predecessors, (98), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 20:05:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1289 transitions. [2021-12-06 20:05:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 20:05:39,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:05:39,847 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 20:05:39,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-12-06 20:05:40,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-12-06 20:05:40,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:05:40,249 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:05:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:05:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1882104939, now seen corresponding path program 2 times [2021-12-06 20:05:40,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:05:40,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022091952] [2021-12-06 20:05:40,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:05:40,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:05:40,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:05:40,256 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:05:40,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 20:05:40,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:05:40,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:05:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:05:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:05:41,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:05:41,405 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2815 (Array (_ BitVec 32) (_ BitVec 32))) (append_~node~0.base (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_2815) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|))) is different from true [2021-12-06 20:05:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 83 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 1 not checked. [2021-12-06 20:05:41,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:05:41,829 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2818 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_135 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_135 v_ArrVal_2818) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_135)))))) is different from false [2021-12-06 20:05:41,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:05:41,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022091952] [2021-12-06 20:05:41,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022091952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:05:41,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [579728254] [2021-12-06 20:05:41,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:05:41,832 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:05:41,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:05:41,833 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:05:41,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-12-06 20:05:42,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:05:42,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:05:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:05:42,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:05:43,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:05:43,142 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:05:43,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 20:05:43,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 20:05:43,274 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:05:43,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 20:05:47,470 INFO L354 Elim1Store]: treesize reduction 75, result has 15.7 percent of original size [2021-12-06 20:05:47,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 61 [2021-12-06 20:05:47,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 20:05:47,505 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 20:05:47,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2021-12-06 20:05:47,698 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 20:05:47,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 67 [2021-12-06 20:05:47,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-12-06 20:05:48,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-12-06 20:05:48,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-12-06 20:05:48,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 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 20 [2021-12-06 20:05:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 75 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 20:05:48,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:05:50,934 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2991 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_2991) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))))) (_ bv1 1)))) is different from false [2021-12-06 20:05:50,982 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2991 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_136 (_ BitVec 32)) (v_ArrVal_2987 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_136 v_ArrVal_2987) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_136 v_ArrVal_2991) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_136)))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_2987)) (_ bv1 1)))))) is different from false [2021-12-06 20:05:51,030 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2991 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_136 (_ BitVec 32)) (v_ArrVal_2987 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_136)))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_2987)) (_ bv1 1)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_136 v_ArrVal_2987) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_136 v_ArrVal_2991) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))))))))) (_ bv1 1))))) is different from false [2021-12-06 20:05:51,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:05:51,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2021-12-06 20:05:51,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 412 treesize of output 286 [2021-12-06 20:05:51,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 238 [2021-12-06 20:05:51,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 115 [2021-12-06 20:05:53,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [579728254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:05:53,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:05:53,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 27 [2021-12-06 20:05:53,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970673497] [2021-12-06 20:05:53,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:05:53,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:05:53,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:05:53,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:05:53,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=762, Unknown=29, NotChecked=300, Total=1190 [2021-12-06 20:05:53,481 INFO L87 Difference]: Start difference. First operand 779 states and 1289 transitions. Second operand has 27 states, 24 states have (on average 5.083333333333333) internal successors, (122), 21 states have internal predecessors, (122), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 20:06:28,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:06:28,311 INFO L93 Difference]: Finished difference Result 1253 states and 1572 transitions. [2021-12-06 20:06:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:06:28,312 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 5.083333333333333) internal successors, (122), 21 states have internal predecessors, (122), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 87 [2021-12-06 20:06:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:06:28,317 INFO L225 Difference]: With dead ends: 1253 [2021-12-06 20:06:28,317 INFO L226 Difference]: Without dead ends: 1253 [2021-12-06 20:06:28,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=198, Invalid=1639, Unknown=75, NotChecked=440, Total=2352 [2021-12-06 20:06:28,318 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 1020 mSDsluCounter, 6645 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 7249 SdHoareTripleChecker+Invalid, 5432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2884 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:06:28,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1020 Valid, 7249 Invalid, 5432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2419 Invalid, 0 Unknown, 2884 Unchecked, 4.2s Time] [2021-12-06 20:06:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-12-06 20:06:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 775. [2021-12-06 20:06:28,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 607 states have (on average 1.8220757825370675) internal successors, (1106), 727 states have internal predecessors, (1106), 45 states have call successors, (45), 10 states have call predecessors, (45), 6 states have return successors, (122), 45 states have call predecessors, (122), 45 states have call successors, (122) [2021-12-06 20:06:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1273 transitions. [2021-12-06 20:06:28,334 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1273 transitions. Word has length 87 [2021-12-06 20:06:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:06:28,335 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1273 transitions. [2021-12-06 20:06:28,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 5.083333333333333) internal successors, (122), 21 states have internal predecessors, (122), 6 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-06 20:06:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1273 transitions. [2021-12-06 20:06:28,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 20:06:28,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:06:28,336 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:06:28,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-12-06 20:06:28,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 20:06:28,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:06:28,738 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:06:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:06:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash -79612932, now seen corresponding path program 2 times [2021-12-06 20:06:28,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:06:28,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436470364] [2021-12-06 20:06:28,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:06:28,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:06:28,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:06:28,743 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:06:28,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-06 20:06:29,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:06:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:06:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:06:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:06:29,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:06:29,636 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32)) (v_ArrVal_3164 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_3164) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:06:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 97 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 1 not checked. [2021-12-06 20:06:29,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:06:30,042 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3167 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_143 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_143 v_ArrVal_3167) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_143)))))) is different from false [2021-12-06 20:06:30,045 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:06:30,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436470364] [2021-12-06 20:06:30,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436470364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:06:30,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2092918692] [2021-12-06 20:06:30,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:06:30,045 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:06:30,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:06:30,046 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:06:30,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-12-06 20:06:30,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:06:30,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:06:30,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:06:30,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:06:31,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:06:31,629 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:06:31,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 20:06:31,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 20:06:31,783 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:06:31,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 20:06:34,153 INFO L354 Elim1Store]: treesize reduction 75, result has 15.7 percent of original size [2021-12-06 20:06:34,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 61 [2021-12-06 20:06:34,197 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 20:06:34,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 20:06:34,430 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 20:06:34,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 61 [2021-12-06 20:06:34,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-12-06 20:06:34,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 20:06:35,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 20:06:35,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-12-06 20:06:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-06 20:06:35,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:06:35,580 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3340 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_3340) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32))))))))))) (_ bv1 1)))) is different from false [2021-12-06 20:06:37,842 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3336 (_ BitVec 1)) (v_append_~node~0.base_144 (_ BitVec 32)) (v_ArrVal_3340 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_144)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_144 v_ArrVal_3336) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_144 v_ArrVal_3340) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_3336)) (_ bv1 1)))))) is different from false [2021-12-06 20:06:37,893 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3336 (_ BitVec 1)) (v_append_~node~0.base_144 (_ BitVec 32)) (v_ArrVal_3340 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_144 v_ArrVal_3336) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_144 v_ArrVal_3340) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))))))))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_144))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_3336)) (_ bv1 1)))))) is different from false [2021-12-06 20:06:38,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:06:38,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2021-12-06 20:06:38,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 240 treesize of output 180 [2021-12-06 20:06:38,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2021-12-06 20:06:38,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 134 [2021-12-06 20:06:40,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2092918692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:06:40,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:06:40,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 27 [2021-12-06 20:06:40,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653463302] [2021-12-06 20:06:40,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:06:40,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:06:40,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:06:40,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:06:40,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=764, Unknown=27, NotChecked=300, Total=1190 [2021-12-06 20:06:40,344 INFO L87 Difference]: Start difference. First operand 775 states and 1273 transitions. Second operand has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 24 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:07:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:07:35,416 INFO L93 Difference]: Finished difference Result 1241 states and 1549 transitions. [2021-12-06 20:07:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 20:07:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 24 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 96 [2021-12-06 20:07:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:07:35,422 INFO L225 Difference]: With dead ends: 1241 [2021-12-06 20:07:35,422 INFO L226 Difference]: Without dead ends: 1241 [2021-12-06 20:07:35,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 182 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=281, Invalid=2203, Unknown=86, NotChecked=510, Total=3080 [2021-12-06 20:07:35,423 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 1031 mSDsluCounter, 7623 mSDsCounter, 0 mSdLazyCounter, 3679 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 8228 SdHoareTripleChecker+Invalid, 6188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2405 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:07:35,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 8228 Invalid, 6188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3679 Invalid, 0 Unknown, 2405 Unchecked, 6.1s Time] [2021-12-06 20:07:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-12-06 20:07:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 746. [2021-12-06 20:07:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 581 states have (on average 1.846815834767642) internal successors, (1073), 702 states have internal predecessors, (1073), 42 states have call successors, (42), 8 states have call predecessors, (42), 6 states have return successors, (116), 43 states have call predecessors, (116), 42 states have call successors, (116) [2021-12-06 20:07:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1231 transitions. [2021-12-06 20:07:35,439 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1231 transitions. Word has length 96 [2021-12-06 20:07:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:07:35,440 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1231 transitions. [2021-12-06 20:07:35,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.814814814814815) internal successors, (130), 24 states have internal predecessors, (130), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 20:07:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1231 transitions. [2021-12-06 20:07:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 20:07:35,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:07:35,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-06 20:07:35,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-12-06 20:07:35,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-12-06 20:07:35,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 20:07:35,842 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:07:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:07:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1104503420, now seen corresponding path program 1 times [2021-12-06 20:07:35,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:07:35,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915108194] [2021-12-06 20:07:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:07:35,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:07:35,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:07:35,848 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:07:35,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-06 20:07:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:07:36,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:07:36,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:07:36,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:07:36,974 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32)) (v_ArrVal_3545 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_3545) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|))) is different from true [2021-12-06 20:07:37,017 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (or (not |c_append_#t~short58|) (exists ((v_ArrVal_3545 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_3545) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:07:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 116 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 1 not checked. [2021-12-06 20:07:37,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:07:37,348 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_151 (_ BitVec 32)) (v_ArrVal_3548 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_151 v_ArrVal_3548) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_151)))))))) is different from false [2021-12-06 20:07:37,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:07:37,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915108194] [2021-12-06 20:07:37,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915108194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:07:37,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [580944012] [2021-12-06 20:07:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:07:37,351 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:07:37,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:07:37,351 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:07:37,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-12-06 20:07:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:07:43,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 20:07:43,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:07:43,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:07:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 116 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 20:07:43,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:07:44,028 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3751 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_155 (_ BitVec 32))) (or (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_155 v_ArrVal_3751) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_155)))))) is different from false [2021-12-06 20:07:44,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [580944012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:07:44,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:07:44,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-12-06 20:07:44,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734498450] [2021-12-06 20:07:44,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:07:44,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:07:44,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:07:44,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:07:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=190, Unknown=23, NotChecked=124, Total=380 [2021-12-06 20:07:44,032 INFO L87 Difference]: Start difference. First operand 746 states and 1231 transitions. Second operand has 18 states, 16 states have (on average 6.125) internal successors, (98), 15 states have internal predecessors, (98), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 20:07:50,363 WARN L860 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| c_append_~node~0.base))) (exists ((append_~node~0.base (_ BitVec 32))) (and (or (not |c_append_#t~short58|) (exists ((v_ArrVal_3545 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_3545) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) (or (not |c_append_#t~short58|) (exists ((v_ArrVal_3746 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| c_append_~node~0.base v_ArrVal_3746) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32))))) is different from true [2021-12-06 20:07:57,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:07:57,495 INFO L93 Difference]: Finished difference Result 1363 states and 1835 transitions. [2021-12-06 20:07:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:07:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 6.125) internal successors, (98), 15 states have internal predecessors, (98), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 102 [2021-12-06 20:07:57,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:07:57,501 INFO L225 Difference]: With dead ends: 1363 [2021-12-06 20:07:57,501 INFO L226 Difference]: Without dead ends: 1363 [2021-12-06 20:07:57,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=78, Invalid=369, Unknown=35, NotChecked=220, Total=702 [2021-12-06 20:07:57,502 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 1018 mSDsluCounter, 6036 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 6647 SdHoareTripleChecker+Invalid, 5405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2695 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:07:57,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 6647 Invalid, 5405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 2578 Invalid, 0 Unknown, 2695 Unchecked, 5.0s Time] [2021-12-06 20:07:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-12-06 20:07:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 747. [2021-12-06 20:07:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 581 states have (on average 1.846815834767642) internal successors, (1073), 702 states have internal predecessors, (1073), 43 states have call successors, (43), 8 states have call predecessors, (43), 6 states have return successors, (118), 44 states have call predecessors, (118), 43 states have call successors, (118) [2021-12-06 20:07:57,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1234 transitions. [2021-12-06 20:07:57,519 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1234 transitions. Word has length 102 [2021-12-06 20:07:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:07:57,519 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1234 transitions. [2021-12-06 20:07:57,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 6.125) internal successors, (98), 15 states have internal predecessors, (98), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 20:07:57,520 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1234 transitions. [2021-12-06 20:07:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 20:07:57,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:07:57,520 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:07:57,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-12-06 20:07:57,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-12-06 20:07:57,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:07:57,922 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:07:57,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:07:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash -220892089, now seen corresponding path program 2 times [2021-12-06 20:07:57,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:07:57,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275571912] [2021-12-06 20:07:57,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:07:57,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:07:57,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:07:57,927 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:07:57,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-12-06 20:07:58,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:07:58,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:07:58,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:07:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:07:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:07:58,979 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32)) (v_ArrVal_3948 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_3948) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|))) is different from true [2021-12-06 20:07:59,028 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (or (not |c_append_#t~short58|) (exists ((v_ArrVal_3948 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_3948) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))) is different from true [2021-12-06 20:07:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 118 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 2 not checked. [2021-12-06 20:07:59,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:07:59,334 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3951 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_159 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_159))))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_159 v_ArrVal_3951) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))))) is different from false [2021-12-06 20:07:59,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:07:59,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275571912] [2021-12-06 20:07:59,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275571912] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:07:59,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1550443538] [2021-12-06 20:07:59,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:07:59,337 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:07:59,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:07:59,338 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:07:59,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-12-06 20:08:00,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:08:00,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:08:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:08:00,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:08:00,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:08:00,907 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:08:00,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 20:08:00,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 20:08:01,050 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:08:01,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 20:08:01,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 20:08:01,254 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-06 20:08:01,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 39 [2021-12-06 20:08:01,439 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 20:08:01,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 66 [2021-12-06 20:08:01,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 20:08:02,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 20:08:02,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-12-06 20:08:02,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 30 [2021-12-06 20:08:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 110 proven. 17 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 20:08:02,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:08:05,007 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_160 (_ BitVec 32)) (v_ArrVal_4156 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4152 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_160 v_ArrVal_4152) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_160 v_ArrVal_4156) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_160)))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_4152)) (_ bv1 1)))))) is different from false [2021-12-06 20:08:05,063 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_160 (_ BitVec 32)) (v_ArrVal_4156 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4152 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_160 v_ArrVal_4152) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_160 v_ArrVal_4156) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_160)))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_4152)) (_ bv1 1)))))) is different from false [2021-12-06 20:08:05,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:08:05,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2021-12-06 20:08:05,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 206 treesize of output 146 [2021-12-06 20:08:05,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2021-12-06 20:08:05,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-12-06 20:08:07,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1550443538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:08:07,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:08:07,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 28 [2021-12-06 20:08:07,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108038257] [2021-12-06 20:08:07,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:08:07,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 20:08:07,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:08:07,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 20:08:07,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=820, Unknown=22, NotChecked=310, Total=1260 [2021-12-06 20:08:07,529 INFO L87 Difference]: Start difference. First operand 747 states and 1234 transitions. Second operand has 28 states, 25 states have (on average 4.88) internal successors, (122), 22 states have internal predecessors, (122), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 20:08:36,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:08:36,867 INFO L93 Difference]: Finished difference Result 1223 states and 1525 transitions. [2021-12-06 20:08:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 20:08:36,868 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.88) internal successors, (122), 22 states have internal predecessors, (122), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 104 [2021-12-06 20:08:36,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:08:36,872 INFO L225 Difference]: With dead ends: 1223 [2021-12-06 20:08:36,873 INFO L226 Difference]: Without dead ends: 1223 [2021-12-06 20:08:36,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=202, Invalid=1736, Unknown=62, NotChecked=450, Total=2450 [2021-12-06 20:08:36,874 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 772 mSDsluCounter, 7287 mSDsCounter, 0 mSdLazyCounter, 3228 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 7885 SdHoareTripleChecker+Invalid, 7367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4032 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:08:36,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 7885 Invalid, 7367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3228 Invalid, 0 Unknown, 4032 Unchecked, 5.0s Time] [2021-12-06 20:08:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-12-06 20:08:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 745. [2021-12-06 20:08:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 581 states have (on average 1.846815834767642) internal successors, (1073), 702 states have internal predecessors, (1073), 41 states have call successors, (41), 8 states have call predecessors, (41), 6 states have return successors, (112), 40 states have call predecessors, (112), 41 states have call successors, (112) [2021-12-06 20:08:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1226 transitions. [2021-12-06 20:08:36,888 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1226 transitions. Word has length 104 [2021-12-06 20:08:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:08:36,889 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1226 transitions. [2021-12-06 20:08:36,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.88) internal successors, (122), 22 states have internal predecessors, (122), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-06 20:08:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1226 transitions. [2021-12-06 20:08:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-06 20:08:36,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:08:36,890 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-12-06 20:08:36,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-12-06 20:08:37,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2021-12-06 20:08:37,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 20:08:37,292 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:08:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:08:37,293 INFO L85 PathProgramCache]: Analyzing trace with hash -399169983, now seen corresponding path program 1 times [2021-12-06 20:08:37,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:08:37,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333574744] [2021-12-06 20:08:37,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:08:37,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:08:37,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:08:37,297 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:08:37,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-12-06 20:08:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:08:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:08:37,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:08:38,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:08:38,402 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4393 (Array (_ BitVec 32) (_ BitVec 32))) (append_~node~0.base (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| append_~node~0.base))))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_4393) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|))) is different from true [2021-12-06 20:08:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 151 proven. 7 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-06 20:08:38,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:08:38,875 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_167 (_ BitVec 32)) (v_ArrVal_4396 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_167 v_ArrVal_4396) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_167))))))) is different from false [2021-12-06 20:08:38,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:08:38,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333574744] [2021-12-06 20:08:38,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333574744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:08:38,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [761104981] [2021-12-06 20:08:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:08:38,878 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:08:38,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:08:38,878 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:08:38,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-12-06 20:08:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:08:49,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:08:49,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:08:50,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:08:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 151 proven. 7 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-06 20:08:50,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:08:50,581 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4629 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_171 (_ BitVec 32))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_171 v_ArrVal_4629) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_171)))))) is different from false [2021-12-06 20:08:50,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [761104981] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:08:50,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:08:50,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-12-06 20:08:50,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877258746] [2021-12-06 20:08:50,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:08:50,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:08:50,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:08:50,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:08:50,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=9, NotChecked=72, Total=240 [2021-12-06 20:08:50,585 INFO L87 Difference]: Start difference. First operand 745 states and 1226 transitions. Second operand has 14 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 20:09:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:03,263 INFO L93 Difference]: Finished difference Result 1362 states and 1829 transitions. [2021-12-06 20:09:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 20:09:03,264 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 121 [2021-12-06 20:09:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:03,271 INFO L225 Difference]: With dead ends: 1362 [2021-12-06 20:09:03,271 INFO L226 Difference]: Without dead ends: 1362 [2021-12-06 20:09:03,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=64, Invalid=267, Unknown=23, NotChecked=108, Total=462 [2021-12-06 20:09:03,272 INFO L933 BasicCegarLoop]: 606 mSDtfsCounter, 1030 mSDsluCounter, 3891 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 4497 SdHoareTripleChecker+Invalid, 3874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1592 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:03,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 4497 Invalid, 3874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2151 Invalid, 0 Unknown, 1592 Unchecked, 4.3s Time] [2021-12-06 20:09:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-12-06 20:09:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 746. [2021-12-06 20:09:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 581 states have (on average 1.846815834767642) internal successors, (1073), 702 states have internal predecessors, (1073), 42 states have call successors, (42), 8 states have call predecessors, (42), 6 states have return successors, (114), 41 states have call predecessors, (114), 42 states have call successors, (114) [2021-12-06 20:09:03,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1229 transitions. [2021-12-06 20:09:03,293 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1229 transitions. Word has length 121 [2021-12-06 20:09:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:03,294 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1229 transitions. [2021-12-06 20:09:03,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 7.0) internal successors, (84), 11 states have internal predecessors, (84), 5 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 20:09:03,294 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1229 transitions. [2021-12-06 20:09:03,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 20:09:03,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:03,295 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:09:03,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-12-06 20:09:03,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-12-06 20:09:03,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 20:09:03,696 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:09:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:03,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1943662404, now seen corresponding path program 2 times [2021-12-06 20:09:03,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:09:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050465992] [2021-12-06 20:09:03,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:09:03,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:09:03,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:09:03,700 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:09:03,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-12-06 20:09:04,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:09:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:09:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:04,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:09:04,697 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4858 (Array (_ BitVec 32) (_ BitVec 32))) (append_~node~0.base (_ BitVec 32))) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_4858) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:09:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 153 proven. 8 refuted. 0 times theorem prover too weak. 76 trivial. 1 not checked. [2021-12-06 20:09:04,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:05,162 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4861 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_175 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_175))))))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_175 v_ArrVal_4861) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))))) is different from false [2021-12-06 20:09:05,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:09:05,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050465992] [2021-12-06 20:09:05,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050465992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:05,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531113498] [2021-12-06 20:09:05,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:09:05,165 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:09:05,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:09:05,166 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:09:05,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-12-06 20:09:06,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:09:06,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:09:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:09:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:06,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:09:07,105 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:09:07,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 20:09:07,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 20:09:07,260 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:09:07,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 20:09:07,496 INFO L354 Elim1Store]: treesize reduction 75, result has 15.7 percent of original size [2021-12-06 20:09:07,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 65 [2021-12-06 20:09:07,529 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 20:09:07,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 20:09:07,861 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 20:09:07,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 69 [2021-12-06 20:09:08,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 20:09:08,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 20:09:08,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-12-06 20:09:09,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-12-06 20:09:09,289 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 145 proven. 17 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-06 20:09:09,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:09,603 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5098 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_5098) c_append_~head.base) (bvadd c_append_~head.offset (_ bv4 32)))))))) (_ bv1 1)))) is different from false [2021-12-06 20:09:09,681 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5094 (_ BitVec 1)) (v_append_~node~0.base_176 (_ BitVec 32)) (v_ArrVal_5098 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_176 v_ArrVal_5094) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_176 v_ArrVal_5098) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg v_ArrVal_5094) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_176)))))) is different from false [2021-12-06 20:09:09,732 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5094 (_ BitVec 1)) (v_append_~node~0.base_176 (_ BitVec 32)) (v_ArrVal_5098 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvadd (bvneg v_ArrVal_5094) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_176)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_176 v_ArrVal_5094) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_176 v_ArrVal_5098) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))))))))))) is different from false [2021-12-06 20:09:09,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:09:09,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 40 [2021-12-06 20:09:09,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 389 treesize of output 263 [2021-12-06 20:09:09,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 107 [2021-12-06 20:09:09,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 206 [2021-12-06 20:09:12,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531113498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:12,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:09:12,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 26 [2021-12-06 20:09:12,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701075192] [2021-12-06 20:09:12,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:09:12,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 20:09:12,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:09:12,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 20:09:12,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=707, Unknown=31, NotChecked=290, Total=1122 [2021-12-06 20:09:12,314 INFO L87 Difference]: Start difference. First operand 746 states and 1229 transitions. Second operand has 26 states, 24 states have (on average 5.25) internal successors, (126), 21 states have internal predecessors, (126), 6 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 20:09:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:09:40,536 INFO L93 Difference]: Finished difference Result 1223 states and 1524 transitions. [2021-12-06 20:09:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 20:09:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 5.25) internal successors, (126), 21 states have internal predecessors, (126), 6 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 123 [2021-12-06 20:09:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:09:40,542 INFO L225 Difference]: With dead ends: 1223 [2021-12-06 20:09:40,542 INFO L226 Difference]: Without dead ends: 1223 [2021-12-06 20:09:40,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 238 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=175, Invalid=1415, Unknown=70, NotChecked=410, Total=2070 [2021-12-06 20:09:40,543 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 1018 mSDsluCounter, 7231 mSDsCounter, 0 mSdLazyCounter, 2825 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 7825 SdHoareTripleChecker+Invalid, 5183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2260 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:09:40,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 7825 Invalid, 5183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2825 Invalid, 0 Unknown, 2260 Unchecked, 5.0s Time] [2021-12-06 20:09:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-12-06 20:09:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 745. [2021-12-06 20:09:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 581 states have (on average 1.846815834767642) internal successors, (1073), 702 states have internal predecessors, (1073), 41 states have call successors, (41), 8 states have call predecessors, (41), 6 states have return successors, (111), 39 states have call predecessors, (111), 41 states have call successors, (111) [2021-12-06 20:09:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1225 transitions. [2021-12-06 20:09:40,557 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1225 transitions. Word has length 123 [2021-12-06 20:09:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:09:40,557 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1225 transitions. [2021-12-06 20:09:40,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 5.25) internal successors, (126), 21 states have internal predecessors, (126), 6 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 20:09:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1225 transitions. [2021-12-06 20:09:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 20:09:40,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:09:40,558 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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] [2021-12-06 20:09:40,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-12-06 20:09:40,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2021-12-06 20:09:40,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 20:09:40,960 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:09:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:09:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1753302012, now seen corresponding path program 1 times [2021-12-06 20:09:40,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:09:40,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610962908] [2021-12-06 20:09:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:40,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:09:40,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:09:40,967 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:09:40,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-12-06 20:09:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:09:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:09:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:09:42,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:09:42,314 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32)) (v_ArrVal_5367 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (= |c_append_#t~mem57.base| (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_5367) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))) is different from true [2021-12-06 20:09:42,439 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (exists ((v_ArrVal_5367 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 32) (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_5367) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)))))) is different from true [2021-12-06 20:09:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 186 proven. 5 refuted. 0 times theorem prover too weak. 133 trivial. 2 not checked. [2021-12-06 20:09:42,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:09:42,742 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_183 (_ BitVec 32)) (v_ArrVal_5370 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 32) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_183 v_ArrVal_5370) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_183)))))))) is different from false [2021-12-06 20:09:42,744 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:09:42,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610962908] [2021-12-06 20:09:42,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610962908] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:09:42,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1106229140] [2021-12-06 20:09:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:09:42,744 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:09:42,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:09:42,745 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:09:42,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-12-06 20:10:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:10:02,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 20:10:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:02,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:10:03,404 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5632 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_5632) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:10:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 186 proven. 5 refuted. 0 times theorem prover too weak. 133 trivial. 2 not checked. [2021-12-06 20:10:03,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:03,640 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5637 (Array (_ BitVec 32) (_ BitVec 32))) (v_append_~node~0.base_187 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_187)))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_187 v_ArrVal_5637) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))))) is different from false [2021-12-06 20:10:03,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1106229140] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:03,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:10:03,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-12-06 20:10:03,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138408715] [2021-12-06 20:10:03,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:03,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 20:10:03,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:10:03,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 20:10:03,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=163, Unknown=24, NotChecked=150, Total=380 [2021-12-06 20:10:03,643 INFO L87 Difference]: Start difference. First operand 745 states and 1225 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 17 states have internal predecessors, (95), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 20:10:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:10:21,134 INFO L93 Difference]: Finished difference Result 1359 states and 1823 transitions. [2021-12-06 20:10:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 20:10:21,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 17 states have internal predecessors, (95), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 139 [2021-12-06 20:10:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:10:21,139 INFO L225 Difference]: With dead ends: 1359 [2021-12-06 20:10:21,139 INFO L226 Difference]: Without dead ends: 1359 [2021-12-06 20:10:21,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 284 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=71, Invalid=326, Unknown=43, NotChecked=210, Total=650 [2021-12-06 20:10:21,140 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 1012 mSDsluCounter, 4863 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 5463 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3239 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 20:10:21,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1030 Valid, 5463 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2284 Invalid, 0 Unknown, 3239 Unchecked, 4.7s Time] [2021-12-06 20:10:21,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-12-06 20:10:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 753. [2021-12-06 20:10:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 587 states have (on average 1.8449744463373083) internal successors, (1083), 708 states have internal predecessors, (1083), 43 states have call successors, (43), 8 states have call predecessors, (43), 6 states have return successors, (115), 42 states have call predecessors, (115), 43 states have call successors, (115) [2021-12-06 20:10:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1241 transitions. [2021-12-06 20:10:21,154 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1241 transitions. Word has length 139 [2021-12-06 20:10:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:10:21,154 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1241 transitions. [2021-12-06 20:10:21,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 17 states have internal predecessors, (95), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-12-06 20:10:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1241 transitions. [2021-12-06 20:10:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 20:10:21,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:10:21,155 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:10:21,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-12-06 20:10:21,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-12-06 20:10:21,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 20:10:21,557 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting appendErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 143 more)] === [2021-12-06 20:10:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:10:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash 842236505, now seen corresponding path program 2 times [2021-12-06 20:10:21,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 20:10:21,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976215467] [2021-12-06 20:10:21,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:10:21,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 20:10:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 20:10:21,562 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 20:10:21,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-12-06 20:10:22,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:10:22,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:10:22,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 20:10:22,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:22,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:10:23,016 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32)) (v_ArrVal_5898 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_5898) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) |c_append_#t~mem57.base|))) is different from true [2021-12-06 20:10:23,139 WARN L860 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base (_ BitVec 32))) (and (exists ((v_ArrVal_5898 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_old(#memory_$Pointer$.base)| append_~node~0.base v_ArrVal_5898) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|)) (_ bv0 32))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| append_~node~0.base))))) is different from true [2021-12-06 20:10:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 188 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 3 not checked. [2021-12-06 20:10:23,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:23,377 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_191 (_ BitVec 32)) (v_ArrVal_5901 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| v_append_~node~0.base_191))))) (not (= (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_191 v_ArrVal_5901) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|)) (_ bv0 32))))) is different from false [2021-12-06 20:10:23,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 20:10:23,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976215467] [2021-12-06 20:10:23,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976215467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982824543] [2021-12-06 20:10:23,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:10:23,380 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 20:10:23,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 20:10:23,380 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 20:10:23,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0429488e-3044-4581-a8ff-354d135599db/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-12-06 20:10:24,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:10:24,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:10:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 20:10:24,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:10:25,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 20:10:25,516 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:10:25,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-12-06 20:10:25,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-06 20:10:25,649 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 20:10:25,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-12-06 20:10:27,858 INFO L354 Elim1Store]: treesize reduction 75, result has 15.7 percent of original size [2021-12-06 20:10:27,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 62 [2021-12-06 20:10:27,889 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-06 20:10:27,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-12-06 20:10:28,107 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-12-06 20:10:28,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 64 [2021-12-06 20:10:28,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 20:10:28,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-12-06 20:10:29,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 20:10:29,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-12-06 20:10:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 180 proven. 17 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-06 20:10:29,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:10:29,784 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_192 (_ BitVec 32)) (v_ArrVal_6170 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6166 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_192)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_192 v_ArrVal_6166) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_192 v_ArrVal_6170) |c_append_#in~head.base|) (bvadd (_ bv4 32) |c_append_#in~head.offset|))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_6166))) (_ bv1 1)))))) is different from false [2021-12-06 20:10:29,838 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_append_~node~0.base_192 (_ BitVec 32)) (v_ArrVal_6170 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6166 (_ BitVec 1))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_append_~node~0.base_192)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| v_append_~node~0.base_192 v_ArrVal_6166) (select (select (store |c_#memory_$Pointer$.base| v_append_~node~0.base_192 v_ArrVal_6170) |c_ULTIMATE.start_main_~list~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~list~0#1.offset|))))))))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg v_ArrVal_6166))) (_ bv1 1)))))) is different from false [2021-12-06 20:10:30,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 20:10:30,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2021-12-06 20:10:30,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 154 [2021-12-06 20:10:30,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2021-12-06 20:10:30,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-12-06 20:10:32,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [982824543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:10:32,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:10:32,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 27 [2021-12-06 20:10:32,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441245160] [2021-12-06 20:10:32,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:10:32,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 20:10:32,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 20:10:32,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 20:10:32,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=714, Unknown=22, NotChecked=290, Total=1122 [2021-12-06 20:10:32,320 INFO L87 Difference]: Start difference. First operand 753 states and 1241 transitions. Second operand has 27 states, 27 states have (on average 4.7407407407407405) internal successors, (128), 24 states have internal predecessors, (128), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14)